
NT1R20 Off-Premise Station Analog Line card
Page 175 of 906
Circuit Card
Description and Installation
Before the appropriate balance network can be selected, the loop length
between the near-end and the far-end station must be known. To assist in
determining loop length, “Port-to-port loss” on
page 180
describes some
typical resistance and loss values for the most common cable lengths for
comparison with values obtained from actual measurements.
Application
Off-premise station application
The NT1R20 OPS analog line card is designed primarily to provide an
interface for off-premise station lines. An OPS line serves a terminal – usually
a telephone – remote from the PBX either within the same serving area as the
Gain treatment
(Note 5)
No
Yes
Note 1:
Configured in the Analog (500/2500-type) Telephone Administration program LD 10.
Note 2:
The maximum signaling range supported by the OPS analog line card is 2300 ohms.
Note 3:
Loss of untreated (no gain devices) metallic line facility. Upper loss limits correspond to
loop resistance ranges for 26 AWG wire.
Note 4:
The following are the default software impedance settings:
ONP CLS
OPX CLS
Termination Impedance
(TIMP):
600 ohms
600 ohms
Balanced Impedance (BIMP):
600 ohms
3CM2
Note 5:
Gain treatment, such as a Voice Frequency Repeater (VFR) is required to limit the
actual OPS loop loss to 4.5 dB, maximum. VFR treatment of metallic loops having untreated
loss greater than 15 dB (equivalent to a maximum signaling range of 2300 ohms on 26 AWG
wire) is not recommended.
Note 6:
Jumper strap settings JX.0 and JX.1 apply to all eight units; “X” indicates the unit
number, 0 – 7. “Off” indicates that a jumper strap is not installed across both pins on a jumper
block. Store unused straps on the OPS analog line card by installing them on a single jumper.
Table 71
OPS analog line card – configuration (Part 2 of 2)
Application
On-premise station (ONS)
Off-premise station (OPS)
Содержание Circuit Card
Страница 2: ......
Страница 4: ...Page 4 of 906 Revision history 553 3001 211 Standard 3 00 August 2005...
Страница 18: ...Page 18 of 906 Contents 553 3001 211 Standard 3 00 August 2005...
Страница 78: ...Page 78 of 906 Overview 553 3001 211 Standard 3 00 August 2005...
Страница 100: ...Page 100 of 906 Acceptance tests 553 3001 211 Standard 3 00 August 2005...
Страница 156: ...Page 156 of 906 Option settings 553 3001 211 Standard 3 00 August 2005...
Страница 192: ...Page 192 of 906 NT4N39AA CP Pentium IV Card 553 3001 211 Standard 3 00 August 2005...
Страница 248: ...Page 248 of 906 NT5D11 and NT5D14 Lineside T1 Interface cards 553 3001 211 Standard 3 00 August 2005...
Страница 378: ...Page 378 of 906 NT5K21 XMFC MFE card 553 3001 211 Standard 3 00 August 2005...
Страница 384: ...Page 384 of 906 NT6D70 SILC Line card 553 3001 211 Standard 3 00 August 2005...
Страница 388: ...Page 388 of 906 NT6D71 UILC Line card 553 3001 211 Standard 3 00 August 2005...
Страница 533: ...NT8D02 and NTDK16 Digital Line cards Page 533 of 906 Circuit Card Description and Installation Figure 106 NTDK16 DLC...
Страница 544: ...Page 544 of 906 NT8D02 and NTDK16 Digital Line cards 553 3001 211 Standard 3 00 August 2005...
Страница 546: ...Page 546 of 906 NT8D03 Analog Line card 553 3001 211 Standard 3 00 August 2005...
Страница 564: ...Page 564 of 906 NT8D09 Analog Message Waiting Line card 553 3001 211 Standard 3 00 August 2005...
Страница 626: ...Page 626 of 906 NT8D14 Universal Trunk card 553 3001 211 Standard 3 00 August 2005...
Страница 680: ...Page 680 of 906 NT8D41AA Serial Data Interface Paddle Board 553 3001 211 Standard 3 00 August 2005...
Страница 694: ...Page 694 of 906 NT8D41BA Quad Serial Data Interface Paddle Board 553 3001 211 Standard 3 00 August 2005...
Страница 720: ...Page 720 of 906 NTAK09 1 5 Mb DTI PRI card 553 3001 211 Standard 3 00 August 2005...
Страница 734: ...Page 734 of 906 NTAK10 2 0 Mb DTI card 553 3001 211 Standard 3 00 August 2005...
Страница 744: ...Page 744 of 906 NTAK20 Clock Controller daughterboard 553 3001 211 Standard 3 00 August 2005...
Страница 762: ...Page 762 of 906 NTAK79 2 0 Mb PRI card 553 3001 211 Standard 3 00 August 2005...
Страница 768: ...Page 768 of 906 NTAK93 D channel Handler Interface daughterboard 553 3001 211 Standard 3 00 August 2005...
Страница 772: ...Page 772 of 906 NTBK22 MISP card 553 3001 211 Standard 3 00 August 2005...
Страница 844: ...Page 844 of 906 NTVQ01xx Media Card 553 3001 211 Standard 3 00 August 2005...
Страница 850: ...Page 850 of 906 NTVQ55AA ITG Pentium card 553 3001 211 Standard 3 00 August 2005...
Страница 884: ...Page 884 of 906 QPC841 Quad Serial Data Interface card 553 3001 211 Standard 3 00 August 2005...
Страница 906: ...Page 906 of 906 Appendix A LAPB Data Link Control protocol 553 3001 211 Standard 3 00 August 2005...
Страница 907: ......