Nortel Networks 311 Mode 10, Programing DACfor mode 10 in service change LD 11, Mode 11

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 DACdoes 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 DACfor mode 10 in service change LD 11

When used forinbound or outboundhost access, the DAC can be conﬁgured

as R232 in LD 11. When used for both inbound and outbound host access,

the DAC mustbe 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 AutodialDN as longas 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 DACautomatically

tries to Hotline again to reestablish the call.

If the data unit being called does not answer the Hotline call, the DACtries

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 23May 2008