Nortel Circuit Card 311 Reference page 432

432 NT7D16 Data Access card
Figure 109
DAC to Modem Pool connectivity
Mode 1
This mode should be selected when the DAC is connected to an
auto-answer modem for inbound Hotline operation. In this mode, the DAC
automatically executes Hotline operation when RI is driven ON by the
modem. The following modem features are required:
Auto-answer capability This feature is required when the modem is used
for inbound modem pooling. It allows the modem to drive the RI lead ON
when ringing is present at its tip and ring. In addition, the modem should
auto-answer after the first ringing cycle if the DTR lead is ON (most modems
support this feature).
Dynamic control of DCD This feature must be supported by all modems to
be connected to the DAC. It allows the modem to drive the DCD lead ON
when the carrier is detected and OFF when the carrier is absent (most
modems support this feature).
Copyright © 2003-2008, Nortel Networks
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Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008