Nortel Networks Circuit Card 311 User Manual
Page 438
438
NT7D16 Data Access card
Dynamic control of DCD This feature must be supported by all gateways
to be connected to the DAC. It allows the gateway to drive the DCD lead
ON when the data call is established, and OFF when the data call is
disconnected.
The baud rate of the Hotline call is determined by the AUTB and BAUD
parameters in LD 11. The system should be programmed to allow inbound
modem calls only.
Programing DAC for mode 5 in service change LD 11
The DAC must be configured as R232 (the Autodial feature is used for this
mode). The DAC must not be configured as an ADM trunk.
Mode 6
This mode should be selected when the DAC is connected to a gateway that
requires DTR to be ON always except during call disconnection. In this
mode, the DAC can be used for both inbound and outbound operations. The
operation of this mode is similar to mode 4 except for the following:
•
The DTR lead is ON in the idle state.
•
The DTR lead is dropped OFF for 0.2 seconds when an established
call is disconnected.
Programing DAC for mode 6 in service change LD 11
When used for inbound or outbound gateway access, the DAC can be
configured as R232 in LD 11. When used for both inbound and outbound
gateway access, the DAC must be configured as R232. When the DAC is
programmed as station hunting, outbound gateway access should be in the
opposite direction to the hunting for inbound gateway access. See
111 "DAC to Gateway-Inbound/Outbound connectivity" (page 437)
for more
details.
Note: If CDR is required, use separate outbound and inbound gateway
access.
Mode 7
This mode should be selected when the DAC is connected to a gateway for
inbound Hotline operation. The operation of this mode is similar to mode 5
except for the following:
•
The DTR lead is ON in the idle state.
•
The DTR lead is dropped OFF for 0.2 second when an established call
is disconnected.
The baud rate of inbound Hotline calls is determined by programmable
database. The system should be programmed to allow inbound calls only
on the DAC unit.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.