TR41.9.2-05-08-003-TSB31C-Draft13f - Telecommunications ...

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PN
-
3
-
3602
-
RV3 to be published as TIA/TSB31
-
C



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Telecommunications


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Telephone Terminal Equipment
-

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i

FOREWORD

1


2

This
Document

is a TIA Telecommunications Systems Bulletin (TSB), produced
3

by Working Group TR
-
41.9.2 under subcommittee TR
-
41.9 of Engineering Committee
4

TR
-
41, User Premises Telecommunications Requirements, under the sponsor
ship of
5

the Telecommunications Industry Association

[TIA]
. Telecommunications Systems
6

Bulletins are distinguished from TIA Standards in that TSBs contain a compilation of
7

engineering data or information useful to the technical community and represent
8

appro
aches to good engineering practices suggested by formulating group TR
-
41.9.

9


10

This Bulletin is not intended to preclude or discourage other approaches which
11

similarly represent good engineering practice, or which may be acceptable to, or have
12

been accepted
by, appropriate bodies such as the Federal Communications
13

Commission

[FCC]
. Parties who wish other approaches to be considered for inclusion
14

in future revisions of this Bulletin are encouraged to bring them to the attention of the
15

formulating group. It i
s the intention of the formulating group to revise and update this
16

Bulletin from time to time as may be occasioned by changes in technology, industry
17

practice, government regulations, technical criteria, or other appropriate reasons.

18


19

This
Document

outline
s test methods for the technical criteria contained in the
20

following documents:

21

CFR, Title 47,
FCC
Part 68

22

TIA
-
968
-
A

23

T1.TRQ.6
-
2001

24


25

The changes to this
Document

from TSB
-
31
-
B are extensive due to the
26

restructuring of
FCC Part 68

and new technical criteria
that have come into effect since
27

TSB
-
31
-
B was published. This
Document

supercedes TIA
-
TSB
-
31
-
B and represents the
28

consensus of the formulating group.

29


30

31



ii

TR
-
41 COMMITTEE MEMBERS

1


2

{to include others who may have been
missed}


Larry Bell

Adtran

Roger Hunt

AT
LINKS

Rafi Rahamim

Broadcom Corporation

Tim Lawler

Cisco Systems

Efrain Guevara

Industry Canada

Gary Flom

Intertek Testing Services

Greg Slingerland

Mitel Networks Corporation

Peter Walsh

Paradyne

Bryan Skarbek

Sharp Electronics

Tailey Tung

Siemens

ICN

Cliff Chamney

Sprint

Al Martin

Tyco Electronics

Anh Nguyen

Underwriters Labs

Trone Bishop

Verizon

Steve Whitesell

VTech


3


4


5


6

TR
-
41.9 GENERAL COMMITTEE MEMBERS

7

NOTE: THIS IS NOT IN THE MATRIX

8


9

Organization Represented

Name of Representative



{

TR41.9 roster to be provided here}





























10

11



iii

TABLE OF CONTENTS

1

FOREWORD

................................
................................
................................
.........................

I

2

TR
-
41 COMMITTEE MEMBERS

................................
................................
.........................

II

3

TABLE OF CONTENTS

................................
................................
................................
......

III

4

LIST OF FIGURES
................................
................................
................................
............

VIII

5

1

INTRODUCTION

................................
................................
................................
.........

1

6

2

SCOPE

................................
................................
................................
........................

2

7

3

NORMATIVE REFERENCES
................................
................................
......................

3

8

4

DEFINITIONS, ACRONYM
S AND ABBR
EVIATIONS

................................
................

5

9

5

GENERAL INFORMATION

................................
................................
.......................

11

10

5.1

Safety Warning About The Procedures In This Document

................................
..........

11

11

5.2

General Document Structure

................................
................................
......................

11

12

5.3

Simulator Circuit Theory

................................
................................
.............................

11

13

5.4

Test Conditions

................................
................................
................................
...........

11

14

5.5

Suggested Equipment List (SEL)

................................
................................
................

12

15

5.6

Test Requirements Matrix

................................
................................
...........................

17

16

6

ENVIRONMENTAL SIMULA
TION TIA
-
968
-
A, 4.2

................................
....................

18

17

6.1

Sequencing of Environmental Simulations

................................
................................
..

18

18

6.2

Mechanical Shock TIA
-
968
-
A, 4.2
.1
................................
................................
...........

23

19

6.3

Telephone Line Surge
-

Type A, Metallic. TIA
-
968
-
A, 4.2.2.1

................................
...

24

20

6.4

Telephone Line Surge
-

Type A, Longitudinal. TIA
-
968
-
A, 4.2.2.2

.............................

26

21

6.5

Telephone Line Surge
-

Type B, Metallic. TIA
-
968
-
A, 4.2.3.1

................................
...

28

22

6.6

Telephone Line Surge
-

Type B, Longi
tudinal. TIA
-
968
-
A, 4.2.3.2

..............................

31

23

6.7

Power Line Surge TIA
-
968
-
A, 4.2.4

................................
................................
...........

33

24

7

LEAKAGE CURRENT LIMI
TATIONS (ANALOG AND
DIGITAL) TIA
-
968
-
A, 4.3

.....

35

25

8

HAZARDOUS VOLTAGE LI
MITATIONS 68.306 TI
A
-
968
-
A, 4.4

.............................

40

26

8.1

Hazardous Voltage Limitations, General TIA
-
968
-
A, 4
.4.1

................................
.........

40

27

8.2

Hazardous Voltage Limitations, E&M TIA
-
968
-
A, 4.4.1.1, 4.4.1.2, 4.4.1.3

................

42

28

8.3

Hazardous Voltage Limitations, OPS

TIA
-
968
-
A, 4.4.1.4

................................
...........

48

29

8.4

Hazardous Voltage Limitations, DID TIA
-
968
-
A, 4.4.1.5

................................
............

51

30

8.5

Hazardous Voltage Limitations, LADC TI
A
-
968
-
A, 4.4.1.6

................................
.........

53

31



iv

8.6

Ringdown Voiceband Private Line and Metallic Channel Interface

1

TIA
-
968
-
A, 4.4.1.7

................................
................................
................................
..............

55

2

8.7

Physical Separation of Leads TIA
-
968
-
A, 4.4.2

................................
..........................

58

3

8.8

Ringing Sources TIA
-
968
-
A, 4.4.4

................................
................................
.............

60

4

8.9

Inten
tional Operational Paths to Ground TIA
-
968
-
A, 4.4.5.1

................................
......

66

5

8.10

Intentional Protective Paths to Ground TIA
-
968
-
A, 4.4.5.2

................................
........

69

6

9

S
IGNAL POWER LIMITATI
ONS TIA
-
968, 4.5

................................
..........................

72

7

9.1

Voiceband Signal Power


Not Network Control signals TIA
-
968, 4.5.2.1

..................

72

8

9.2

Voiceba
nd Signal Power
-

Network Control Signals TIA
-
968
-
A, 4.5.2.2

....................

80

9

9.3

Through
-
Transmission Equipment


DC Conditions for On
-
Premises

10

TIA
-
968
-
A, 4.5.2.3.1

................................
................................
................................
...........

85

11

9.4

Through
-
Transmission Equipment


Data TIA
-
968
-
A 4.5.2.3.2

...............................

88

12

9.5

Voiceband Signal Power
-

Data TIA
-
968
-
A, 4.5.2.4

................................
...................

89

13

9.6

Through
-
Transmission


Port to Port Amplification TIA
-
968
-
A, 4.5.2.5.1

...................

94

14

9.7

Through
-
Transmission
-

SF Cutoff TIA
-
968
-
A, 4
.5.2.5.1(7)

................................
....

100

15

9.8

Through
-
Transmission
-

SF/Guard Bands TIA
-
968
-
A, 4.5.2.5.2

..............................

103

16

9.9

Return Loss, Tie Trunk
-

Two Wire TIA
-
96
8
-
A, 4.5.2.6.1

................................
.........

109

17

9.10

Return Loss, Tie Trunk
-

Four Wire TIA
-
968
-
A, 4.5.2.6.2

................................
.........

112

18

9.11

Transducer Loss, Tie Trunk
-

Four Wire

TIA
-
468
-
A, 4.5.2.6.3

................................
.

116

19

9.12

DC Conditions, OPS TIA
-
968
-
A, 4.5.2.7

................................
................................
..

120

20

9.13

Signal Power 3995 Hz
-

4005 Hz


Not Network Con
trol Signals

21

TIA
-
968
-
A, 4.5.3.1

................................
................................
................................
............

123

22

9.14

Through Transmission


3995
-
4005 Hz vs 600
-
4000 Hz TIA
-
968
-
A, 4.5.3.2

...........

127

23

9.15

Non
-
LADC Longitudinal Voltage


0.1
-

4 kHz TIA
-
968, 4.5.4
, 4.5.7.1to 4.5.7.3

.......

131

24

9.16

Non
-
LADC Metallic Voltage
-

4 kHz to 30 MHz TIA
-
968, 4.5
.5.1, 4.5.7.2 to 4.5.7.4

..

136

25

9.17

Non
-
LADC Longitudinal Voltage
-

4 kHz to 6 MHz


26

TIA
-
968, 4.5.5.2, 4.5.7.1 to 4.5.7.4

................................
................................
...................

144

27

9.18

Metallic Voltage
-

0.01 kHz to 30 MHz, LADC

28

TIA
-
968
-
A, 4.5.6.1, 4.5.6.2, 4.5.7.5 to 4.5.7.8

................................
................................
...

153

29

9.19

Longitudinal Voltage
-

0.01 kHz to 6 MHz, LADC

30

TIA
-
968
-
A, 4.5.6.3, 4.5.7.5 to 4.5.7.8

................................
................................
................

165

31

9.20

Subrate/PSDSPulse Repetition Rate TIA
-
968
-
A, 4.5.8.1.1 and 4.5.8.3.1

.................

176

32

9.21

Encoded Analog Content TIA
-
968
-
A 4.5.8.1.2, 4.5.8.4, 4.5.8.2.5, 4.5.10

...............

179

33

9.22

EQUIVALENT PSD FOR MAXIMUM OUTPUT, SUBRATE


TIA
-
968
-
A, 4.5.8.1.3

.

182

34

9.23

Averag
e Power, Subrate, Non
-
Secondary Channel Rates, Secondary


35

Channel Rates TIA
-
968
-
A, 4.5.8.1.4 and 4.5.8.1.5

................................
..........................

185

36

9.24

Subrate and PSDS Pulse Template TIA
-
968
-
A, 4.5.8.1.6 and 4.5.8.3.2

...................

187

37

9.25

Average Power, Subrate TIA
-
968
-
A, 4.5.8.1.7

................................
.........................

190

38



v

9.26

Pulse Repetition Rate, 1.544 Mb/s TIA
-
968
-
A, 4.5.8.2.1

................................
..........

193

1

9.27

Output Pulse Template, 1.544 Mb/s TIA
-
968
-
A, 4.5.8.2.2, 4.5.8.2.3

.........................

195

2

9.28

Output Power, 1.544 Mb/s TIA
-
968
-
A, 4.5.8.2.4

................................
......................

198

3

9.29

Unequipped Sub
-
rate Channels TIA
-
968
-
A, 4.5.8.2.6

................................
...............

202

4

9.30

Conditioning ADSL EUT to Transmit Continuously TIA
-
968
-
A, 4.5.8.3.2

.................

203

5

9.31

Signal Power Limitations, ADSL Terminal Equipment TIA
-
968
-
A, 4.5.9.1

..............

204

6

9.32

Power Spectral Density, ADSL Terminal Equipment TIA
-
968
-
A, 4.5.9.1.2, 4.5.9
.1.3

206

7

9.33

Longitudinal Output Voltage, ADSL Terminal Equipment TIA
-
968
-
A, 4.5.9.3

.........

217

8

9.34

Voiceband Signal Power
-

Non
-
ap
proved external signal sources TIA
-
968
-
A
-
3, 4.5.2.2
221

9

10

TRANSVERSE BALANCE L
IMITATIONS TIA
-
968, 4.6

................................
.........

225

10

10.1

Transverse Bala
nce, Analog TIA
-
968
-
A, 4.6.2

................................
.........................

225

11

10.2

Transverse Balance, Digital TIA
-
968
-
A, 4.6.3, 4.6.4

................................
................

231

12

11

ON HOOK IMPEDANCE LI
MITATIONS

TIA
-
968, 4.7

................................
.............

236

13

11.1

DC Resistance TIA
-
968, 4.7.2.1, 4.7.2.2

................................
................................
.

236

14

11.2

DC Current During Ringing TIA
-
968
-
A, 4.7.2.3, 4.7.3.1

................................
............

241

15

11.3

AC Impedance During ringing (Metallic and Longitudinal) TIA
-
968
-
A, 4.7.2.4, 4.7.2.5,
16

4.7.3.2

244

17

11.4

REN Calculation TI
A
-
968
-
A, 4.7.4, 4.7.5

................................
................................
..

249

18

11.5

OPS Ring Trip, PBX with DID TIA
-
968
-
A, 4.7.6

................................
.......................

251

19

11.6

Transitioning to the Off
-
Hook State and Ma
ke
-
busy TIA
-
968
-
A, 4.7.8

.....................

254

20

11.7

Manual programming of Repertory Numbers, TIA
-
968
-
A, 4.7.8.1

.............................

256

21

11.8

Automatic stutter dial t
one detection TIA
-
968
-
A, 4.7.8.2

................................
...........

258

22

12

BILLING PROTECTION T
IA
-
968
-
A, 4.8

................................
................................
..

261

23

12.1

Call Duration for Data Equipment, Protective
Circuitry TIA
-
968
-
A, 4.8.1.1

................

261

24

12.2

Call Duration for Data Applications, Terminal Equipment TIA
-
968
-
A, 4.8.1.2

...........

265

25

12.3

On
-
hoo
k Signal Power, Analog TIA
-
968
-
A, 4.8.2

................................
.....................

269

26

12.4

Off
-
Hook Loop Current TIA
-
968
-
A, 4.8.3

................................
................................
.

273

27

12.5

Signaling Interference, Analo
g TIA
-
968
-
A, 4.8.4.1

................................
...................

278

28

12.6

Signalling Interference, Digital TIA
-
968
-
A, 4.8.4.2

................................
...................

282

29

12.7

On
-
Hook Signal Power, Subrate and 1
.544 Mb/s TIA
-
968
-
A, 4.8.5

.........................

286

30

12.8

Signalling Duration, 1.544 Mb/s TIA
-
968
-
A, 4.8.6

................................
....................

289

31

12.9

Operating Requirements for DID

TIA
-
968
-
A,

4.8
.7

................................
.................

292

32

13

MINIATURE PLUGS AND
JACKS, 6 AND 8 POSIT
ION, ANSI/TIA
-
968
-
A CLAUSE 6
296

33

13.1

Mechanical and Dimension
al Requirements

................................
.............................

296

34

13.2

Hard Gold Contact Interface

................................
................................
.....................

297

35



vi

13.3

Non
-
gold Contact Interface

................................
................................
.......................

300

1

14

SHDSL, HDSL2, HDSL4
TERMINAL EQUIPMENT

................................
................

308

2

14.1

Metallic Signals TIA
-
968
-
A
-
3, 4.5.9.2.1

................................
................................
.....

308

3

14.2

Longitudinal Output Voltage Limits TIA
-
968
-
A
-
3, 4.5.9.2.3

................................
.......

314

4

14.3

Transverse Balance Requirements TIA
-
968
-
A
-
3, 4.6.5

................................
............

318

5

15

HE
ARING AID COMPATIBIL
ITY

................................
................................
.............

314

6

15.1

Hearing
-
Aid Compatibility


Magnetic Field Intensity 68.316

................................
...

314

7

15.2

Hearing Aid Compatibility
, Volume Control FCC Part 68.317

................................
...

323

8

16

MISCELLANEOUS

................................
................................
................................
..

332

9

16.1

Limitations on Automatic Redialing 68.318(b)

................................
...........................

332

10

16.2

Line Seizure by Automatic Telephone Dialing Systems
-

FCC Part 68, 68.318(c)

....

336

11

16.3

Telephone Facsimile Machines: Identification of the S
ender of Messages (FAX
12

branding)
-

FCC Part 68.318(d)

................................
................................
..........................

33
8

13

16.4

Equal Access to Common Carriers
-

FCC Part 68, 68.318(e)

................................
...

341

14

APP
ENDIX A, TEMPLATES F
OR DIGITAL PULSES

................................
.....................

359

15

A.1

Templates for Subrate and PSDS Digital Pulses

................................
......................

359

16

A.2

Pulse Templates for ISDN PRA

and 1.544 megabits per second (Mbps) equipment
374

17

APPENDIX B, EXAMPLE
CALCULATIONS OF WAVE
FORM ENERGY LEVELS
18

(INFORMATIVE)

................................
................................
................................
..............

377

19

APPENDIX C, ALTERNAT
E TRANSVERSE BALANCE
, DIGITAL EUT (INFOR
MATIVE)
379

20

C.1

Background

................................
................................
................................
..............

379

21

C.2

Purpose

................................
................................
................................
....................

380

22

C.3

Equipment

................................
................................
................................
................

380

23

C.4

Equipment States Subject To Test

................................
................................
...........

380

24

C.5

Procedure

................................
................................
................................
.................

380

25

APPENDIX D, MODIFIED

SO
2

METHOD (INFORMATIVE)

................................
...........

383

26

APPENDIX E, INDUSTRI
AL MIXED FLOWING GAS

(INFORMATIVE)

.........................

384

27

E.1

General

................................
................................
................................
.....................

384

28

E.2

Materials

................................
................................
................................
...................

384

29

E.3

Test Equipment
................................
................................
................................
.........

385

30

E.4

Safety and Health Considerations

................................
................................
............

386

31

E.5

Sample Preparation

................................
................................
................................
..

387

32

E.6

Procedure

................................
................................
................................
.................

388

33



vii

E.7

Documentation
................................
................................
................................
..........

391

1

E.8

Summary

................................
................................
................................
..................

391

2

E.9

Historical

................................
................................
................................
...................

391

3


4

5



viii

LIST OF FIGURES

1

Figure 6.1
-
1 Environmental Flowchart

................................
................................
.....

20

2

Figure 7
-
1. Leakage Current

................................
................................
.......................

39

3

Figure 8.2
-
1 E or M
-
Lead Contact Protection

................................
...........................

47

4

Figure 8.8
-
1 Ringing Sources, Two
-
Wire

................................
................................
..

63

5

Figure 8.8
-
2 Ringing Sources, Four
-
Wire

................................
................................

64

6

Figure 8.8
-
3 Ringing Protection

................................
................................
................

65

7

Figure 8.9
-
1 Intentiona
l Operational Paths to ground

................................
.............

68

8

Figure 8.10
-
1 Intentional Protective Paths to Ground

................................
.............

71

9

Figure 9.1
-
1. Voiceband Signal Power, Two
-
Wire
................................
....................

77

10

Figure 9.1
-
2. Voiceband
Signal Power, Four
-
Wire

................................
...................

78

11

Figure 9.1
-
3. Voiceband Signal Power, E&M Tie

................................
.....................

79

12

Figure 9.2
-
1. Network Control Signal Power, Two
-
Wire

................................
..........

83

13

Figure 9.2
-
2. Network Control S
ignal Power, Four
-
Wire

................................
.........

84

14

Figure 9.3
-
1. DC Conditions for Through Transmission

................................
.........

87

15

Figure 9.5
-
1. Voiceband Signal Power, Data, TE

................................
.....................

93

16

Figure 9.6
-
1 Through Transmissi
on, Analog

................................
...........................

97

17

Figure 9.6
-
2. Through Transmission, Digital

................................
...........................

98

18

Figure 9.6
-
3. Digital EUT Arrangement for Figure 9.6
-
2

................................
..........

99

19

Figure 9.7
-
1. Single Frequency Cut
-
off

................................
................................
...

102

20

Figure 9.8
-
1. Through Transmission
-

SF Guard Bands, Analog

.........................

106

21

Figure 9.8
-
2. Through Transmission
-

SF Guard Bands, Digital

..........................

107

22

Figure 9.8
-
3. Digital EUT Arrangeme
nt for Figure 9.8
-
2

................................
........

108

23

Figure 9.9
-
1. Return Loss, Two
-
Wire

................................
................................
......

111

24

Figure 9.10
-
1. Return Loss, Four
-
Wire, T&R

................................
..........................

114

25

Figure 9.10
-
2. Return Loss, Four
-
Wire, T1&R1

................................
.....................

115

26

Figure 9.11
-
1. Transducer Loss, Forward

................................
..............................

118

27

Figure 9.11
-
2 Transducer Loss, Reverse

................................
...............................

119

28

Figure 9.12
-
1. OPS DC Conditions

................................
................................
..........

122

29

Figure 9.13
-
1. Signal Power, 3995
-
4005 Hz, Internal Sources

..............................

126

30

Figure 9.14
-
1 Signal Power, 3995
-
4005 Hz vs 600
-
4000 Hz, Through

31


Transmission

................................
................................
................................
.......

130

32

Figure 9.15
-
1. Voiceband Longitudinal Voltage

................................
.....................

135

33

Figure 9.16
-
1. Non
-
LADC Metallic 4 kHz to 30 MHz

................................
...............

142

34

Figure 9.16
-
2. Non
-
LADC Metallic 270 kHz to 30 MHz

................................
...........

143

35

Figure 9.17
-
1. Non
-
LADC Longitudinal 4 kHz to 6 MHz

................................
.........

150

36

Figure 9.17
-
2. Non
-
LADC Longitudinal 270 kHz to 6 MHz

................................
.....

152

37

Figure 9.18
-
1. LADC Metallic 10 Hz to 4 kHz, T&R

................................
.................

159

38

Figure 9.18
-
2. LADC Metallic 10 Hz to 4 kHz, T1 & R1

................................
...........

160

39

Figure 9.18
-
3. LADC Metallic 700 Hz to 270 kHz, T&R

................................
...........

161

40

Figure 9.18
-
4. LADC Metallic 700 Hz to 270 kHz, T1&R1

................................
........

162

41

Figure 9.18
-
5. LADC Metallic 270 kHz to 30 Mhz, T&
R

................................
..........

163

42

Figure 9.18
-
6. LADC Metallic 270 kHz to 30 MHz, T1&R1

................................
......

164

43

Figure 9.19
-
1. LADC Longitudinal 10 Hz
-

4 kHz, T&R

................................
...........

170

44

Figure 9.19
-
2. LADC Longitudinal 10 Hz to 4

kHz, T1 & R1

................................
..

171

45



ix

Figure 9.19
-
3. LADC Longitudinal 4 kHz to 270 kHz, T & R

................................
..

172

1

Figure 9.19
-
4. LADC Longitudinal 4 kHz to 270 kHz, T1 & R1

..............................

173

2

Figure 9.19
-
5. LADC L
ongitudinal 270 kHz to 6 MHz, T & R

................................
.

174

3

Figure 9.19
-
6. LADC Longitudinal 270 kHz to 6 Mhz, T1 & R1

..............................

175

4

Figure 9.20
-
1. Subrate, Pulse Repetition Rate

................................
........................

178

5

F
F
i
i
g
g
u
u
r
r
e
e


9
9
.
.
2
2
1
1
-
-
1
1
.
.




E
E
n
n
c
c
o
o
d
d
e
e
d
d


A
A
n
n
a
a
l
l
o
o
g
g


C
C
o
o
n
n
t
t
e
e
n
n
t
t

................................
................................

181

6

Figure 9.22
-
1. Subrate Signal Power

................................
................................
......

183

7

F
F
i
i
g
g
u
u
r
r
e
e




9
9
.
.
2
2
3
3
-
-
1
1
.
.


S
S
u
u
b
b
r
r
a
a
t
t
e
e


S
S
i
i
g
g
n
n
a
a
l
l


P
P
o
o
w
w
e
e
r
r

................................
................................
......

186

8

Figure 9.25
-
1. Subrate and PSDS, Pulse Template.
................................
...............

189

9

Figure 9.26
-
1. Subrate, Average Power

................................
................................
..

192

10

Figure 9.27
-
1. 1.544 megabits per second (Mb/s), Pulse Repetition Rate

............

194

11

Figure 9.28
-
1. 1.544 Mb/s, Pulse Template conne
ction diagram

...........................

197

12

Figure 9.29
-
1. 1.544 megabits per second (Mb/s), Output Power
..........................

201

13

Figure 9.31
-
1. Average Signal Power

................................
................................
.......

205

14

Figure 9.32
-
1. PSD Connection Diagram For
Segments 1 & 2

..............................

208

15

Figure 9.32
-
2. Sample PSD Plot For Segment 1

................................
.....................

209

16

Figure 9.32
-
3. Sample PSD Plot For Segment 2

................................
.....................

210

17

Figure 9.32
-
4. PSD Connection Diagram For Segment

3

................................
.......

211

18

Figure 9.32
-
5. Sample PSD Plot For Segment 3

................................
.....................

212

19

Figure 9.32
-
6. PSD Connection Diagram For Segment 4

................................
.......

213

20

Figure 9.32
-
7. Sample PSD Plot For Segment 4

................................
.....................

214

21

Figure 9.33
-
1. LOV Test Fixture & Connection Diagram

................................
........

218

22

Figure 9.33
-
2. Sample LOV Plot

................................
................................
...............

219

23

Figure 9.36
-
1. Voiceband Signal Power
-

Non
-
approved external signal

24


source
s

................................
................................
................................
................

224

25

Figure 10.1
-
1 Transverse Balance, Analog

................................
............................

230

26

Figure 10.2
-
1 Transverse Balance, Digital

................................
.............................

235

27

Figure 11.1
-
1. DC Resistance, T
-
R

................................
................................
.........

239

28

Figure 11.1
-
2. DC Resistance, T
-
GND & R
-
GND

................................
...................

240

29

Figure 11.2
-
1. DC Current During Ringing

................................
............................

243

30

Figure 11.3
-
1. AC Impedance, T
-
R

................................
................................
.........

247

31

Figure 11.3
-
2. AC Impedan
ce, T
-
GND & R
-
GND

................................
....................

248

32

Figure 11.5
-
1. OPS Ring Trip

................................
................................
..................

253

33

Figure 11.7
-
1. Manual Programming of Repertory Dialing Numbers

..................

257

34

Figure 12.1
-
1. Call Duration, PC, Trans
mit

................................
.............................

263

35

Figure 12.1
-
2. Call Duration, PC, Receive

................................
..............................

264

36

Figure 12.2
-
1. Call Duration, EUT, Transmit

................................
...........................

267

37

Figure 12.2
-
2. Call Duration, EUT, Receive

................................
............................

268

38

Figure 12.3
-
1. On
-
hook Signal Power, TE

................................
..............................

271

39

Figure 12.3
-
2. On
-
hook Signal Power, PC

................................
..............................

272

40

Figure 12.4
-
1. Loop Current, 200 ohm Method

................................
......................

276

41

Figure 12
.4
-
2. Loop Current, 25% Method

................................
..............................

277

42

Figure 12.5
-
1. Signaling Interference

................................
................................
.......

281

43

Figure 12.7
-
1. Subrate and 1.544 Mb/s, On
-
hook Level

................................
.........

288

44

Figure 12.8
-
1. 1.544 megabits p
er secondf (Mb/s), Signaling Duration

...............

291

45

Figure 12.9.5.1
-
1. Analog Direct Inward Dialing
................................
.....................

294

46



x

Figure 12.9.5.2
-
1 1.544 megabits per second (Mb/s) Direct Inward Dialing

.........

295

1

Figure 13.3
-
1 Non
-
gold Contact Interface, Test Flow Chart

................................
.

306

2

Figure 13.3
-
2. Contact Resistance Connections

................................
...................

307

3

Figure 14.1
-
1 Test Configuration to Establish Data Mode

................................
.....

313

4

Figure 14.1
-
2 Test Configuration to Measure PSD and Total Power

.....................

313

5

Figure 14.2
-
1 LOV TEST FIXTURE & CONNECTION DIAGRAM

............................

317

6

F
F
i
i
g
g
u
u
r
r
e
e


1
1
5
5
.
.
1
1
-
-
1
1






S
S
e
e
t
t
u
u
p
p


f
f
o
o
r
r


t
t
e
e
s
s
t
t
i
i
n
n
g
g


F
F
C
C
C
C


P
P
a
a
r
r
t
t


6
6
8
8
.
.
3
3
1
1
6
6


H
H
A
A
C
C


f
f
o
o
r
r


A
A
n
n
a
a
l
l
o
o
g
g


T
T
e
e
l
l
e
e
p
p
h
h
o
o
n
n
e
e

....

319

7

F
F
i
i
g
g
u
u
r
r
e
e


1
1
5
5
.
.
1
1
-
-
2
2






S
S
e
e
t
t
u
u
p
p


f
f
o
o
r
r


t
t
e
e
s
s
t
t
i
i
n
n
g
g


F
F
C
C
C
C


P
P
a
a
r
r
t
t


6
6
8
8
.
.
3
3
1
1
6
6


H
H
A
A
C
C


f
f
o
o
r
r


I
I
S
S
D
D
N
N


T
T
e
e
l
l
e
e
p
p
h
h
o
o
n
n
e
e

........

320

8

F
F
i
i
g
g
u
u
r
r
e
e


1
1
5
5
.
.
1
1
-
-
3
3






S
S
e
e
t
t
u
u
p
p


f
f
o
o
r
r


t
t
e
e
s
s
t
t
i
i
n
n
g
g


F
F
C
C
C
C


P
P
a
a
r
r
t
t


6
6
8
8
.
.
3
3
1
1
6
6


H
H
A
A
C
C


f
f
o
o
r
r




9



P
P
r
r
o
o
p
p
r
r
i
i
e
e
t
t
a
a
r
r
y
y


&
&


S
S
p
p
e
e
c
c
i
i
a
a
l
l


u
u
s
s
e
e


T
T
e
e
l
l
e
e
p
p
h
h
o
o
n
n
e
e

................................
................................

321

10

F
F
i
i
g
g
u
u
r
r
e
e


1
1
5
5
.
.
1
1
-
-
4
4






S
S
e
e
t
t
u
u
p
p


f
f
o
o
r
r


t
t
e
e
s
s
t
t
i
i
n
n
g
g


F
F
C
C
C
C


P
P
a
a
r
r
t
t


6
6
8
8
.
.
3
3
1
1
6
6


H
H
A
A
C
C


f
f
o
o
r
r


I
I
P
P
-
-
b
b
a
a
s
s
e
e
d
d


T
T
e
e
l
l
e
e
p
p
h
h
o
o
n
n
e
e

.

322

11

Figure 15.2
-
1 Setup for testing FCC Part 68.317 HAC volume control for Analog
12

Telephone

................................
................................
................................
............

327

13

Figure 15.2
-
2 Setup for testing FCC Part 68.317 HAC volume control for ISDN
14

Telephone

................................
................................
................................
............

329

15

F
F
i
i
g
g
u
u
r
r
e
e


1
1
5
5
.
.
2
2
-
-
3
3






S
S
e
e
t
t
u
u
p
p


f
f
o
o
r
r


t
t
e
e
s
s
t
t
i
i
n
n
g
g


F
F
C
C
C
C


P
P
a
a
r
r
t
t


6
6
8
8
.
.
3
3
1
1
7
7


H
H
A
A
C
C


v
v
o
o
l
l
u
u
m
m
e
e


c
c
o
o
n
n
t
t
r
r
o
o
l
l


f
f
o
o
r
r


16

P
P
r
r
o
o
p
p
r
r
i
i
e
e
t
t
a
a
r
r
y
y


&
&


S
S
p
p
e
e
c
c
i
i
a
a
l
l


u
u
s
s
e
e


T
T
e
e
l
l
e
e
p
p
h
h
o
o
n
n
e
e

................................
................................

330

17

F
F
i
i
g
g
u
u
r
r
e
e


1
1
5
5
.
.
2
2
-
-
4
4






S
S
e
e
t
t
u
u
p
p


f
f
o
o
r
r


t
t
e
e
s
s
t
t
i
i
n
n
g
g


FCC Part 68.317 HAC volume control for IP
-
based
18

Telephone

................................
................................
................................
............

331

19

Figure 16.1
-
1

................................
................................
................................
..............

335

20

Figure A1
-
1. Subrate, Pulse Template, 2.4 kilobits per secon
d (kb/s)

.................

360

21

Figure A1
-
2. Subrate, Pulse Template, 3.2 kilobits per second (kb/s)

.................

361

22

Figure A1
-
3. Subrate, Pulse Template, 4.8 kilobits per second (kb/s)

.................

362

23

Figur
e A1
-
4. Subrate, Pulse Template, 6.4 kilobits per second (kb/s)

.................

363

24

Figure A1
-
5. Subrate, Pulse Template, 9.6 kilobits per second (kb/s)

.................

364

25

Figure A1
-
6. Subrate, Pulse Template, 12.8 kilobits
per second (kb/s)

...............

365

26

Figure A1
-
7. Subrate, Pulse Template, 19.2 kilobits per second (kb/s)

...............

366

27

Figure A1
-
8. Subrate, Pulse Template, 25.6 kilobits per second (kb/s)

...............

367

28

Figure A1
-
9. Subrate, Pulse Template, 38.4 kilobits per second (kb/s)

...............

368

29

Figure A1
-
10. Subrate, Pulse Template, 51.2 kilobits per second (kb/s)

.............

369

30

Figure A1
-
11. Subrate, Pulse Template,

56.0 kilobits per second (kb/s)

.............

370

31

Figure A1
-
12. Subrate, Pulse Template, 72.0 kilobits per second (kb/s)

.............

371

32

Figure A1
-
13. PSDS Type II Pulse Template, 144 kilobits per second (kb/s)

.....

372

33

Figure A1
-
14. PSDS Type Iii Pulse Template, 160 kilobits per second (kb/s)

.....

373

34

Figure A2
-
1. 1.544 megabits per second (Mbps), Pulse Template, Option B

.......

375

35

Figure A2
-
2.
1.544 megabits per second (Mbps), Pulse Template, Option C

.......

376

36

Figure B1
-
1. Calculation of Energy Levels

................................
.............................

378

37

Figure C
-
1: Test Fixture To Measure Transverse Balance Using A Ratio

38



Of Currents

................................
................................
................................
.........

382

39

Figure E.6
-
1. Chamber Zone Configuration

................................
............................

392

40

Figure E.6
-
2. Control Coupon Locations

................................
................................

393

41



42



43



44



1



1

1

INTRODUCTION

2

FCC Part 68

of the Federal Communications Commission (FCC
) rules and regulations
3

(
Clause 3, ref 9
) contains and references the minimum technical standards that terminal
4

equipment must meet in order to be connected to the telephone network.
FCC Part 68

5

references technical criteria adopted by the Administrative
Council for Terminal
6

Attachments (ACTA) which provides uniform standards for the protection of the
7

telephone network from harm caused by the connection of terminal equipment.
FCC
8

Part 68

defines harm as:

9


10

electrical hazards to the personnel of providers of

wireline telecommunications;

11



damage to the equipment of providers of wireline telecommunications;

12



malfunction of the billing equipment of providers of wireline telecommunications;
13

and,

14



degradation of service to persons other than the user of the subject

terminal
15

equipment and his calling or called party.

16


17

In addition,
FCC Part 68

contains terminal equipment requirements that address
18

specific consumer protection issues. At the time of publication these were:

19


20



compatibility with magnetically coupled heari
ng aids;

21



receive volume control on devices with a handset or headset;

22



identification of the sender of the message by telephone facsimile machines;

23



access to common carriers;

24



automatic dialing and redialing capability; and,

25



line seizure by automatic telepho
ne dialing systems.

26


27

Terminal equipment may not be connected to the telephone network unless it has either
28

been certified by a Telecommunication Certification Body (TCB) or the responsible party
29

has followed all of the procedures in
FCC Part 68

for a Suppl
ier’s Declaration of
30

Conformity (SDoC). Both of these approval processes require terminal equipment to be
31

tested for compliance with the technical criteria in
FCC Part 68

and the technical crite
ria
32

adopted by the ACTA. This D
ocument recommends test proce
dures, test equipment,
33

and guidelines for determining compliance with the technical criteria in
FCC Part 68

and
34

the technical criteria adopted by the ACTA.

35


36

The ACTA can be contacted via the Internet at www.part68.org.

37


38

39



2


1

2

SCOPE

2


3

This
Document

recommends te
st procedures, test equipment, and guidelines for
4

determining compliance with the technical requirements of
FCC Part 68

and the
5

technical criteria adopted by the ACTA. At the time of publication, this
6

Telecommunications Systems Bulletin [
TSB
]

addressed req
uirements in the following
7

Document
s:

8


9

CFR, Title 47,
FCC Part 68

10

ANSI/TIA
-
968
-
A

11

ANSI/TIA
-
968
-
A
-
1 (addendum)

12

ANSI/TIA
-
968
-
A
-
2 (addendum)

13

ANSI/TIA
-
968
-
A
-
3 (addendum)

14

This
Document

proposes at least one measurement procedure for each technical
15

requirement a
nd, in some cases, an alternative measurement procedure. However, in
16

most cases, these proposed procedures are not exclusive. Other measurement
17

procedures and test equipment may provide equivalent results.

18


19

In the event of conflict between any of the sta
ndards outlined above and this
Document
,
20

the standard takes precedence.

21


22

The test procedures do not cover the administrative or other equipment authorization
23

procedures that may be required to obtain product approval. It is recommended that
24

you refer to
the administrative requirements outlined by the ACTA. TIA also has TIA
-
25

TSB
-
129
-
A that summarizes these administrative requirements.

26


27

Each test procedure is cross
-
referenced to the appropriate
subclause
of the applicable
28

requirements document.
Subclause

4.5

provides a test requirement matrix that indicates
29

the applicable requirement(s) and test guideline(s) for each specific type of network
30

interface.

31


32

Some of the tests or procedures specified in this
Document

may involve the presence of
33

hazardous voltages a
nd currents or other potential dangers. Some of these hazards
34

have been identified, and appropriate warnings have been included in the text
35

specifying such tests or procedures. Appropriate safety precautions are always
36

recommended when performing any labo
ratory test or procedure.

37


38

39



3


1

3

NORMATIVE REFERENCES

2


3


4

The following documents contain provisions that, through reference in this text,
5

constitute provisions of this Document. At the time of publication, the editions indicated
6

were valid. All documents are
subject to revision, and parties to agreements based on
7

this Document are encouraged to investigate the possibility of applying the most recent
8

editions of the documents published by them.

9


10

1.

ANSI/EIA
-
364
-
09C
-
99 (1999), TP
-
09C,
Durability Test Procedure for
Electrical
11

Connectors and Contacts

12

2.

ANSI/EIA
-
364
-
13B
-
98 (1998),
Mating and Unmating Forces Test Procedures for
13

Electrical Connectors.

14

3.

ANSI/EIA
-
364
-
53B
-
00 (2000),
Nitric Acid Vapor test, Gold Finish Test Procedure for
15

Electrical Connectors.

16

4.

ANSI/TIA
-
968
-
A (2
002),
Telecommunications


Telephone Terminal Equipment
-

17

Technical Requirements for Connection of Terminal Equipment to the Telephone
18

Network

19

5.

ASTM B568
-
98 (1998),
Standard Test Method for Measurement of Coating Thickness
20

by X
-
Ray Spectrometry.

21

6.

ASTM B735
-
9
5 (2000),
Standard Test Method for Porosity in Gold Coatings on Metal
22

Substrates by Nitric Acid Vapor

23

7.

ASTM B741
-
95 (2000),
Standard Test Method for Porosity In Gold Coatings On Metal
24

Substrates By Paper Electrography.

25

8.

ATSM E384
-
99e1 (1999),
Standard Test M
ethod for Microindentation Hardness of
26

Materials

27

9.

FCC Part 68, Code of Federal Regulations (CFR), Title 47, Part 68,
Connection of
28

Terminal Equipment to the Telephone Network.

29

10.

FCC Public Notice 9160 (November 1, 1978),
Notice of Declaratory Ruling on the
30

In
terpretation of
Subclause

68.314(d)

31

11.

IEEE 1027 (1996),
Method for Measuring of the Magnetic Field Intensity In The Vicinity
32

of a Telephone Receiver
.

33

12.

T1.TRQ.6
-
2001,
Technical Requirements for SHDSL, HDSL2, HDSL4 Digital
34

Subscriber Line Terminal Equipment to
Prevent Harm to the Telephone Network

35

13.

TIA
-
504
-
A (1997),
Telecommunications
-
Telephone Terminal Equipment
-
Magnetic
36

Field and Acoustic Gain Requirements for Headset Telephones Intended for Use by
37

the Hard of Hearing.

38


39



4

INFORMATIVE REFERENCES

1

The following doc
uments contain provisions that do not constitute provisions of this
2

Document. These documents may or may not be referenced in this text. They are
3

supplied for information purposes only. At the time of publication, the editions indicated
4

were valid. All
documents are subject to revision, and parties to agreements based on
5

this Document are encouraged to investigate the possibility of applying the most recent
6

editions of the documents published by them.

7


8

1.

ANSI/TIA
-
232
-
F (2002),
Interface Between Data Termin
al Equipment and Data Circuit
-
9

Terminating Equipment Employing Serial Binary Data Interchange

10

2.

ANSI/TIA
-
464
-
C (2002),
Telecommunications
-

Multiline Terminal Systems
-

11

Requirements for PBX Switching Equipment
.

12

3.

CS
-
03, (Issue 8, June 15, 1996, Industry Canada)
,
Specification for Terminal
13

Equipment, Terminal Systems, Network Protection Devices, Connection Arrangements
14

and Hearing Aids Compatibility.

15

4.

FCC Part 2, Code of Federal Regulations (CFR), Title 47, Part 2,
Frequency
16

Allocations and Radio Treaty Matters; G
eneral Rules and Regulations.

17

5.

IEC 60512
-
2
-
1 (2002
-
02)
Connectors for electronic equipment
-

Tests and
18

measurements
-

Part 2
-
1: Electrical continuity and contact resistance tests
-

Test 2a:
19

Contact resistance
-

Millivolt level method

20

6.

IEC 60512
-
2
-
2 (2003
-
05)
Connectors for electronic equipment
-

Tests and
21

measurements
-

Part 2
-
2: Electrical continuity and contact resistance tests
-

Test 2b:
22

Contact resistance
-

Specified test current method

23

7.

IEC 60512
-
2
-
3 (2002
-
02)
Connectors for electronic equipment
-

Tests and

24

measurements
-

Part 2
-
3: Electrical continuity and contact resistance tests
-

Test 2c:
25

Contact resistance variation.

26

8.

ITU Reccomendation K.21
(add title)

27

9.

TIA/TSB
-
129
-
A (2002),
Telecommunications


Telephone Terminal Equipment
-

U.S.
28

Network Connections Regu
latory Approval Guide

29

10.

TIA/TSB
-
168
-
A (2003),
Telecommunications


Telephone Terminal Equipment


30

Labeling Requirements

31

11.

TIA
-
579 (1991),

32

12.

TIA
-
470
-
A (1987),

33

13.

T
1.401
-
2000,

34


35

36



5


1

4

DEFINITIONS, ACRONYMS AND ABBREVIATIONS

2


3

These definitions are meant to be used within

the framework of this
Document
.
4

Additional definitions and information may be found in the publications referenced in
5

Appendix B.

6

ADSL


Asynchronous Digital Subscriber Loop

7

Cadenced Ringing

8

The process of alerting the called party with the application o
f a ringing signal which is
9

cycled on and off. Typical CO ringing consists of 2
-
second intervals of 20 Hz energy
10

applied between tip and ring, followed by a 4
-
second quiet interval. This sequence is
11

repeated until the called party answers or the call is
abandoned.

12

Capture Level

13

Equipment with AGC (Automatic Gain Control) signal power limiting has virtually no
14

output signal power for input levels below a certain value. At some input signal power,
15

the output level will become significant (usually correspon
ding to the expected output
16

level for service application). The input level at which this occurs is defined as the
17

“capture level”.

18



Central
-
office
-
implemented telephone

19

A telephone executing coin acceptance requiring coin service signaling from the centra
l
20

office on a loop
-
start access line. For
FCC Part 68

and TIA
-
968
-
A testing purposes,
21

central
-
office
-
implemented telephones are treated somewhat differently than most loop
-
22

start devices due to the use of coin service signaling. The differences are identi
fied by
23

notes and explanatory text throughout this
Document
. See also the definition for coin
-
24

implemented telephone.

25

CO

26

Telephone Central Office.

27

CODEC


Coder/Decoder (analog or digital)

28



Coin
-
implemented telephone:

29

A telephone containing all circuitry r
equired to execute coin acceptance and related
30

functions within the instrument itself and not requiring coin service signaling from the
31

central office. For
FCC Part 68

and TIA
-
968
-
A testing purposes, coin
-
implemented
32

telephones are treated like any other
loop
-
start device. See also the definition for
33

central
-
office
-
implemented telephone.

34

Common Mode

35

See Longitudinal Mode.

36

CPE
-

Customer Premises Equipment

37

Equipment which is located on the customer's side of the network interface.

38



6

DC Signal

1

A
DC

voltage or
current.

2

DC Signaling

3

The transmission of information using changes in
DC

signals. Pulse dialing is an
4

example of
DC

signaling used for the purpose of network addressing.

5

dBm

6

Power level in decibels with reference to a power of 0.001 W (e.g., 0 dBm is a p
ower
7

level of 1 mW).

8

dBV

9

Voltage in decibels with reference to a voltage level of 1 V (e.g. 0 dBV is a voltage level
10

of 1 V).

11

DID
-

Direct Inward Dialing

12

A feature that permits incoming PSTN calls to be routed directly to a PBX station upon
13

receipt of addr
essing information.

14

Differential Mode

15

See Metallic Mode.

16

DTMF
-

Dual Tone Multi
-
Frequency

17

A means of network signaling that uses a simultaneous combination of two specified
18

voiceband tones to represent a digit (i.e. twelve different combinations of seven t
ones
19

provide digits 0 through 9, *, and #).

20

Encoded Analog Content

21

The digital representation of analog signals encoded in a digital bitstream. See also
22

Section 13.10.1.

23

EUT
-

Equipment Under Test.

24

FIC
-

Facility Interface Code

25

A code which identifies the

type of network facility necessary for a connection. These
26

codes are listed in the "
FCC Part 68

Application Guide"(Ref A17).

27

Ground Start

28

A method of signaling whereby one of the network connections is grounded by
29

equipment (CO or CPE) originating a dema
nd for service.

30

Intentional Conducting Path to Ground

31

Any electrical path which, by design, has components which are intended to allow
32

currents to flow to ground.

33

ISDN
-

Integrated Services Digital Network

34

ISDN BRA
-

Basic Rate Access

35



7

ISDN Basic Rate Inte
rface

1

A two
-
wire interface between the terminal equipment and ISDN BRA.

2

ISDN PRA
-

Primary Rate Access

3

ISDN Primary Rate Interface

4

A four
-
wire interface between the terminal equipment and 1.544 Mbps PRA.

5

Isolated Pulse

6

A pulse whose waveform is unaffected
by leading or trailing pulses.

7

KTS
-

Key Telephone System

8

LADC
-

Local Area Data Channel

9

A channel which allows wider than voiceband frequency transmission over network
10

private line metallic facilities.

11

LAN
-

Local Area Network

12


13

Live Voice

14

Actual human sp
eech as opposed to recorded or synthesized speech.

15

Longitudinal Mode

16

That portion of a signal, which is identical in amplitude and phase, on both leads of a
17

transmission pair with respect to ground.

18

Loop Start

19

A method of signaling using the completion of
a
DC

current path (loop).

20

Metallic Mode

21

That portion of a signal, which is identical in amplitude and opposite in phase, on both
22

leads of a transmission pair with respect to ground.

23

Off
-
Hook

24

A term used to denote the active state of telephone terminal equi
pment.

25

On
-
Hook

26

A term used to denote the inactive state of telephone terminal equipment.

27

28



8

OPS
-

Off Premises Station

1

CPE intended to be located on a premises not contiguous with the premises of its
2

associated PBX, or KTS, and where the two units are connec
ted via telephone network
3

facilities.

4

Overload Point

5

For signal power limiting circuits incorporating automatic gain control method, the
6

“overload point” is the value of the input signal that is 15 dB greater than the capture
7

level.

8

For signal power limiti
ng circuits incorporating peak limiting method, the “overload point”
9

is defined as the input level at which the equipment’s through gain decreases by 0.4 dB
10

from its nominal constant gain.

11

PBX


Private Branch Exchange

12

PC
-

Protective Circuitry.

13

Primary Pr
otector

14

Devices, installed by the telephone companies, on circuits which are exposed to
15

voltages induced on cables by lightning strikes. Such devices limit the magnitude of the
16

voltage presented to the customer premises wire and equipment.

17

PSD


Power Spe
ctral Density

18

PSDS Type II Analog Mode Loop Simulator Circuit

19

A circuit simulating the network side of the two
-
wire telephone connection that is used
20

for testing terminal equipment to be connected to the PSDS Type II loops.

21

PSTN
-

Public Switched Telephone

Network.

22

Public Switched Digital Service Type I (PSDS Type I)

23

This service functions only in a digital mode. It employs a transmission rate of 56 Kbps
24

on both the transmit and receive pairs to provide a four
-
wire full duplex digital channel.

25

Public Switc
hed Digital Service Type II (PSDS Type II)

26

This service functions in two modes, analog and digital. Analog signaling procedures
27

are used to perform supervisory and address signaling ove
r the network. After an end
-
28

to
-
end
connection is established, the Sw
itched Circuit Data Service Unit (SCDSU) is
29

switched to the digital mode.

30

Public Switched Digital Service Type III (PSDS Type III)

31

This service functions only in a digital mode. It uses a time compression multiplexing
32

(TCM) rate of 160 Kbps, over one pai
r to provide a full duplex 64 Kbps user channel.

33

34



9

REN
-

Ringer Equivalence Number

1

A normalized measure of the on
-
hook electrical impedance load presented to the PSTN
2

by the CPE and used to determine the quantity of devices that may be connected to a
3

singl
e telephone line and still have all those devices ring when that telephone number is
4

called. In most areas, the sum of the RENs of all devices connected to one line should
5

not exceed five (5.0).

6

Reverse Battery Interface

7

An interface, used with DID, where
the battery feed is provided by the CPE instead of
8

the CO and where the CPE uses a signaling method of polarity reversal to indicate call
9

status towards the CO.

10

SF
-

Single Frequency

11

SF is a method of network signaling that uses in
-
band signals. The SF sig
naling band is
12

from 2450 Hz to 2750 Hz. The SF guard band is from 800 Hz to 2450 Hz.

13

Subrate Digital Service

14

A digital service providing full
-
time, simultaneous, two
-
way transmission of digital
15

signals at speeds as specified in
Subclause

68.308
(Change to
TIA
-
968
-
A subclause)


16

Switched Circuit Data Service Unit (SCDSU)

17

A CPE device, with PSDS functionality, located between the network Interface and the
18

data terminal equipment. It is also sometimes referred to as Network Channel
19

Terminating Equipment).

20

Swi
tchhook

21

A term that refers to that component of the telephone terminal equipment controlling its
22

operating states (See also On
-
Hook and Off
-
Hook).

23

TE
-

Terminal Equipment.

24

Test Equipment

25

Equipment connected at the customer’s premises that is used on the cu
stomer’s side of
26

the network interfaces:

27

(a)
to measure characteristics of the telephone network or;

28

(b)
to detect and isolate a communications fault between a terminal equipment entity
29

and the telephone network.

30

31



10

Tie Trunk

1

A private line between two customer prem
ises switching systems.

2

WAN


Wide Area Network

3

White Noise

4

Noise, either random or impulsive type, that has a flat frequency spectrum over the
5

frequency range of interest.

6

Zero Level Decoder

7

A decoder that yields an analog level of 0 dBm at its output wh
en the input is the digital
8

mW signal (digital equivalent of a 0 dBm, 1000 Hz sine wave).

9

Zero Level Encoder

10

An encoder that yields the digital mW signal (digital equivalent of a 0 dBm, 1000 Hz sine
11

wave) at its output when the input is an analog level of
0 dBm.

12



11

5

GENERAL INFORMATION

1


2

5.1

Safety Warning About The Procedures In This Document

3

Some of the tests or procedures specified in this
Document

may involve the presence of
4

hazardous voltages and currents or other potential dangers. Some of these hazards
5

hav
e been identified, and appropriate warnings have been included in the text
6

specifying such tests or procedures. Appropriate safety precautions are always
7

recommended when performing any laboratory test or procedure.

8


9

5.2

General Document Structure

10

Each test pr
ocedure is cross
-
referenced to the appropriate sub
clause

of the applicable
11

requirements document.
Subclause

5.6

provides a test requirement matrix that indicates
12

the applicable requirement(s) and test guideline(s) for each specific type of network
13

interfac
e.

14


15

5.3

Simulator Circuit Theory

16

Operation and performance of CPE are affected by the characteristics of the PSTN.
17

Ideally, the CPE should be evaluated over the expected range of facilities and their
18

operating characteristics. However, this is impractical and

produces results that may
19

not be repeatable. Thus, circuits were devised that would reasonably simulate those
20

characteristics of the network that affect the CPE operation from a network harm
21

viewpoint.

22


23

The simul
ators are illustrated in clause

1 of
TIA
-
9
68
-
A
. They simulate the
DC

voltage
24

and resistance ranges that the CPE normally encounters when connected to the
25

network. They also include the
AC
termination to be used for each application.