Configure Isdn To Answer V.120 Calls - Digi TransPort WR11 User Manual

Configuring network interfaces
Configure ISDN to answer V.120 calls
V.120 is a protocol designed to provide high-speed point-to-point communication over ISDN. It
provides rate adaptation and can optionally provide error control. Both the calling and called routers
must be configured to use V.120 before data can be transferred. Similarly, if one router is configured
to use the error control facility, the other must be configured in the same way.
Initial setup
Before using V.120 you must first bind one of the two available V.120 instances to the required ASY
port.
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1. Go to Configuration > Network > Interfaces > Serial > Protocol Bindings and bind one of
the V.120 instances to the ASY port. See
about these settings.
2. Select the appropriate method of flow control for the ASY port. Go to Configuration > Network
> Interfaces > Serial > Serial Port n .
Command line
1. Use the bind command; for example:
bi nd v120 0 asy 0
2. Use the AT&K command to configure flow control for the ASY port. Configure other ASY port
options such as command echo, result code format, etc. as needed.
Initiating a V.120 call
Command line
Once the initial configuration is complete, initiate V.120 calls using the appropriate ATD command. For
example:
at d01234567890
A successful connection is indicated by a CONNECT result code being issued to the ASY port, and the
router will switch into on-line mode. In this mode, all data from the terminal attached to the bound
ASY port is passed transparently through the router across the ISDN network to the remote system.
Similarly, all data from the remote system is passed directly to the terminal attached to the bound
ASY port.
If a V.120 call fails the router will issue the NO ANSWER or NO CARRIER result code to the ASY port
and remain in command mode.
You can use the ATD command to route a call to an ISDN sub-address by following the telephone
number with the letter S and the required sub-address value. For example:
at d01234567890s003
In this case, the remote system only answers the call if it was configured to accept incoming calls on
the specified sub-address.
Digi TransPort® Routers User Guide
Configure protocol bindings
Configure ISDN interfaces
for more information
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