Nortel Networks Circuit Card - Manual (Page 461)

NT7D16 Data Access card Page 461 of 906
Circuit Card Description and Installation
Note: If AUTB is set to ON, the BAUD parameter is not prompted. If
AUTB is set to OFF, you may select a fixed baud rate in response to the
prompt BAUD.
When the DAC receives a call, it adapts to the caller’s baud rate.
See Table 158 for connect and disconnect protocol.
Table 158
Connect and disconnect protocol (Part 1 of 12)
Mode of
operation
Interface application Comments
Mode 0 Inbound and Outbound
modem pools
For inbound modem pools,
most dumb modems may be
used.
For outbound modem pools,
only smart modems
(auto-dialer) may be used.
Outbound modem pooling:
Modem sends ring/no ring cycle (2 seconds ON, 4
seconds OFF) to initiate connection.
DAC responds by driving DTR ON within the first
ring cycle.
Modem responds by answering the incoming call
and driving DCD ON within 35 seconds.
If modem does not drive DCD ON within 35
seconds, the DAC drops DTR and goes idle.
Remote DTE sends <CR> to the DAC. The DAC
autobauds and sends initial prompt.