Nortel Networks Circuit Card 311 - Manual (Page 439)

Operating modes 439
Programing DAC for mode 7 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.
Selecting the proper mode for Host connectivity
Select modes 8, 9, 10, and 11 when the DAC is connected to different types
of hosts (DTE). In these modes, the DAC operates as a DCE and drives
DSR, DCD, and RI control leads (see
Figure 112 "DAC to Host connectivity"
(page 439) ). CTS, DSR, and DCD are driven OFF in the idle state.
The DAC does not send any menu or prompt to the host, nor echoes any
command sent from the host. The CTS, DSR, and DCD are driven ON until
the call is released. An incoming call to the DAC causes the RI lead to go
ON for 2 seconds and then OFF for 4 seconds until the call is answered
by the host. When the host turns DTR ON, the DAC answers the call. If
DM-to-DM protocol exchange is successful, the DAC drives CTS, DSR, and
DCD ON. If DTR was already ON, the DAC does not drive RI ON.
Figure 112
DAC to Host connectivity
Mode 8
This mode should be selected when the DAC is connected to a host for
host accessing. In this mode, the DAC operates in a similar manner to the
MCDS. The hosts display the following characteristics:
Auto-answer capability The host should be capable of monitoring the RI
lead for detection of incoming calls. When RI is turned ON by the DAC, the
host responds by driving DTR ON, which forces the DAC to answer the
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
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