Cisco Cisco Expressway
Allowing dialing to Expressway domain from Cisco phones
Configure a SIP route pattern that tells Unified CM that anything with, for example, a domain vc.ciscotp.com
needs to be sent down the Expressway SIP trunk. This is required to permit dialing from endpoints that
support SIP URIs with domains, and also for enabling the reverse path to the Expressway for certain
signaling.
needs to be sent down the Expressway SIP trunk. This is required to permit dialing from endpoints that
support SIP URIs with domains, and also for enabling the reverse path to the Expressway for certain
signaling.
1. On Unified CM, go to
Call Routing > SIP Route Pattern
.
2. Click Add New.
3. Configure the fields as follows:
Pattern Usage
Domain Routing
IPv4 Pattern
Domain for calls, for example ciscotp.com
Route Partition
Default is “<None>”; set according to dial plan restrictions
SIP Trunk
Required Trunk to route calls to the Unified CM
4. Click Save.
When <name>@ciscotp.com is dialed by an endpoint registered to Unified CM, Unified CM will route the call
to the Expressway as <name>@<FQDN of Expressway>:5060 (TCP) or
<name>@<FQDN of Expressway>:5061 (TLS). (The domain may alternatively be the IP address of
Expressway, depending on what is configured as the SIP Trunk Destination Address.)
to the Expressway as <name>@<FQDN of Expressway>:5060 (TCP) or
<name>@<FQDN of Expressway>:5061 (TLS). (The domain may alternatively be the IP address of
Expressway, depending on what is configured as the SIP Trunk Destination Address.)
Checking the message size limit on Unified CM
SIP messages for video are considerably larger than SIP messages for audio calls, in particular, when a
Cisco TelePresence Server is used in the video network.
Cisco TelePresence Server is used in the video network.
Ensure that the SIP Max Incoming Message Size on Unified CM is set to 11000:
Microsoft Lync and Cisco Expressway Deployment Guide (X8.1)
Page 25 of 63
Enabling endpoints registered on the video network to call clients registered on Lync