Answering V.120 Calls - Digi TransPort User Manual

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In this case, the remote system will only answer the call if it has been configured to accept
incoming calls on the specified sub-address.

Answering V.120 calls

V.120 answering can be enabled from the command interface by setting register S0 for the
appropriate ASY port to a non-zero value. For example:
ats0=1
You should ensure that you have set S0 for the correct ASY port by either entering it directly on
that port or by using the AT\PORT command to select the correct port first.
The actual value used for the parameter sets the number of rings the unit will wait before
answering.
Finally, you must ensure that there are no conflicts with other protocols configured to answer on
other ASY ports. This can be done by disabling answering for the other ports/protocols or by
using the MSN and/or Sub-address parameters to selectively answer calls to different telephone
numbers using different protocols.
For example, if you have subscribed to the ISDN MSN facility, you may have been allocated say
four telephone numbers ending in 4, 5, 6 and 7. You could then set the MSN parameter for the
appropriate V.120 instance to 4 to configure V.120 to answer only incoming calls to the MSN
number ending in 4.
You should check that if PPP answering is enabled you have NOT selected the same MSN and
Sub-address values for PPP. If they are the same, V.120 will answer the call ONLY if S0 is set to 1.
Otherwise, PPP will take priority and answer the call.
Digi TransPort User Guide
Answering V.120 calls
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