Nortel Networks Circuit Card 311 - Manual (Page 441)

Operating modes 441
Mode 10
This mode should be selected when the DAC is connected to a host for
inbound host accessing. The host in this mode is not required to monitor RI
or drive DTR. This mode is similar to mode 8, except for the following:
• The status of DTR lead is assumed to be always ON, even when the
actual condition of that lead is OFF (forced-DTR). The DAC always
answers an incoming call regardless of the status of DTR.
• The host cannot release an established data call by driving DTR OFF.
As a result, the host cannot initiate call release except with a long break
or three short breaks.
In this mode, the DAC does not send any menus or prompts to the host.
However, the host can still originate an outgoing call by blind-dialing
(sending commands to the DAC without receiving echoes).
Programing DAC for mode 10 in service change LD 11
When used for inbound or outbound host access, the DAC can be configured
as R232 in LD 11. When used for both inbound and outbound host access,
the DAC must be configured as R232. When the DAC is programmed as
station hunting, outbound host access should be in the opposite direction to
the hunting for inbound host access.
Note: If CDR is required, use separate outbound and inbound gateway
access.
Mode 11
This mode provides a "virtual leased line" and the meaning of the Forced
DTR switch is re-defined. The operation is similar to having a leased
line feature, where the connection between two extensions is always
established. The DAC does not send any menus or prompts to the host.
The baud rate of the Hotline call is determined by switches 6, 7, and 8.
This mode should be selected when the DAC is connected to a host and
continuous Hotline operation is required. In this mode, the DAC repeatedly
tries to Hotline to the Autodial DN as long as DTR is ON. When the DAC tries
to Hotline to a busy Data Module, it activates Ring Again and the connection
is established as soon as the called unit is free. After establishing the data
call, if the called unit releases the call for any reason, the DAC automatically
tries to Hotline again to reestablish the call.
If the data unit being called does not answer the Hotline call, the DAC tries
to place another Hotline call once every 40 seconds until the called unit
answers. This mode is recommended only when a permanent connection
between a host and another data unit is required.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.