
NT8D14 Universal Trunk card
Page 581 of 906
Circuit Card
Description and Installation
reverse-wired trunk becomes correctly wired, the first subsequent call clears
the threshold counter and normal ground start processing is implemented.
Note 1:
The far-end can reverse battery and ground upon receipt of
attendant answer.
Note 2:
The near-end provides a high-impedance (>150k ohms)
disconnect signal of at least 50 ms before reconnecting the ground
detector.
Outgoing calls
For outgoing calls, the trunk provides a ground to the ring lead. The CO
responds by grounding the tip and returning dial tone. After the tip ground is
detected by the card, a low-resistance path is placed between the tip and ring
leads and the ground is removed from the ring. Addressing is then applied
from the system in the form of loop (interrupting) dial pulses or DTMF tones.
See Figure 121 on
page 582
and Figure 122 on
page 583
.
The Polarity-Sensitive/Polarity-Insensitive Packs (PSP and PIP) feature must
be set to provide for proper outgoing call-duration recording with ground start
operation. Refer to the description of loop start operation in this section for a
more complete discussion of PSP and PIP.
Содержание Circuit Card
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Страница 4: ...Page 4 of 906 Revision history 553 3001 211 Standard 3 00 August 2005...
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Страница 156: ...Page 156 of 906 Option settings 553 3001 211 Standard 3 00 August 2005...
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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...
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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...
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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...
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