Cisco Cisco Expressway
Appendix 6: Additional information
TEL URI handling for Expressway to Lync calls
If an endpoint wants to dial a telephone number rather than selecting a user from a directory, the Unified CM
must format the telephone number appropriately for Lync to be able to look it up. Lync expects to see
telephone numbers (known as TEL: URIs) in the form: +<country code><full dialed number>
must format the telephone number appropriately for Lync to be able to look it up. Lync expects to see
telephone numbers (known as TEL: URIs) in the form: +<country code><full dialed number>
Unified CM can use transforms to appropriately format the telephone numbers. These transforms can either
be implemented globally using
be implemented globally using
Configuration > Dial plan > Transforms
or just for the Lync neighbor zone
or B2BUA neighbor zone by configuring the transform in the appropriate search rules.
For example, for 4 digit extension number dialing to be expanded to a full telephone number for a company in
the UK whose telephone number is 781xxx, an extension number 1008 would need to be expanded to
+441344781008. This can be implemented by configuring a transform as follows:
the UK whose telephone number is 781xxx, an extension number 1008 would need to be expanded to
+441344781008. This can be implemented by configuring a transform as follows:
Priority
80 (match in preference to the no transform needed rule - 80 is higher priority than 100)
Source
Any
Mode
Alias pattern match
Pattern type
Regex
Pattern string
(1…)@ciscotp\.com(.*)
Patter behavior
Replace
Replace string
+44134478\1;@ciscotp.com;user=phone\2
On successful match
Continue
Target Zone
To Microsoft Lync Server via B2BUA
Microsoft Lync and Cisco Expressway Deployment Guide (X8.1)
Page 61 of 63
Appendix 6: Additional information