Nortel Networks Circuit Card 311 - Manual (Page 430)

430 NT7D16 Data Access card
the call is dropped by the DAC. If the modem turns DCD ON before the
35-second timeout, the DAC validates the incoming call and prepares to
accept <CR> from the remote modem for autobaud. See
Figure 108 "DAC
to modem connectivity" (page 430) for more details.
Figure 108
DAC to modem connectivity
Mode 0
This mode should be selected when the DAC is connected to a modem,
except Hayes-1200, for inbound and outbound modem pooling (see modes 2
and 3 for Hayes-1200 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).
Auto-dial capability This feature is required when the modem is used for
outbound modem pooling. It allows the modem to go off-hook and dial the
remote number (such as Smartmodem Hayes-2400 or Bizcomp).
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.