Nortel Networks Circuit Card 311 - Manual (Page 448)

448 NT7D16 Data Access card
Mode of
operation
Interface application Comments
Call disconnection (DAC):
DAC drops DTR if the local DM user drops the call.
The Gateway must drop DCD.
DAC drops DTR if the DAC receives a long break or
three short breaks. The Gateway must drop DCD.
Call disconnection (Gateway):
Gateway drops DCD (DCD OFF for 100 ms or more).
The DAC drops DTR and disconnects the local call.
Gateway drops DSR (DSR OFF for 100 ms or more).
The DAC drops DTR and disconnects the local call.
Mode 5 Inbound Hotline Gateway
access Inbound Hotline Gateway protocol:
Gateway raises DCD to initiate connection.
DAC responds by trying to establish a Hotline call to
a specific Data Module (Autodial).
When Data Module answers, then and only then, the
DAC turns DTR ON.
Gateway does not need to turn DSR ON. However,
toggling DSR or DCD from ON to OFF causes the
DAC to drop the call.
Gateway is not transparently linked to the equipment
connection to the DM.
Call disconnection:
Disconnection is identical to mode 4.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.