Cisco Cisco Expressway
Creating a transform that converts number@<IP address of
cucm> to number@exp.domain
cucm> to number@exp.domain
When a call is made from Unified CM to Expressway, the callback address is presented as number@<ip
address of cucm>. If the destination endpoint returns the call, the Expressway needs to be able to route it
back to Unified CM. To enable this, the domain portion of the address must have the IP address removed and
the video domain added (so that the existing search rule can route the call to Unified CM). A transform is
required:
address of cucm>. If the destination endpoint returns the call, the Expressway needs to be able to route it
back to Unified CM. To enable this, the domain portion of the address must have the IP address removed and
the video domain added (so that the existing search rule can route the call to Unified CM). A transform is
required:
1. Go to
Configuration > Dial plan > Transforms
.
2. Click New.
3. Configure the fields as follows:
Priority
3
Description
“CUCM IP to domain” for example
Pattern type
Regex
Pattern string
(.*)@<ip address of Unified CM>((:|;).*)?
If a Unified CM cluster is in use, the regex must cater for the IP address of every
possible node, for example (.*)@(10\.1\.2\.22|10\.1\.2\.23)((:|;).*)?
possible node, for example (.*)@(10\.1\.2\.22|10\.1\.2\.23)((:|;).*)?
Pattern behavior
Replace
Replace string
\1@exp.domain\2
State
Enabled
4. Click Create transform.
Creating a transform to convert other Unified CM-supplied
domain variants to number@exp.domain
domain variants to number@exp.domain
This transform converts URIs received from Unified CM to the format used in the Expressway’s neighbor
zones.
zones.
Unified CM with Cisco Expressway (SIP Trunk) Deployment Guide (X8.1)
Page 22 of 40
Configuring Expressway routing