Cisco Cisco Expressway
Update Device Profiles to Encrypt Calls to Unified CM-registered Endpoints
Endpoints registered to Unified CM need to be configured with a "SIP Secure profile" to provide encrypted media and
call negotiation. If such profiles are not available by default, create them at System > Security > Phone Security. On
the secure profiles, you must set Device Security Mode to Encrypted.
call negotiation. If such profiles are not available by default, create them at System > Security > Phone Security. On
the secure profiles, you must set Device Security Mode to Encrypted.
for further information on using the Cisco CTL Client and configuring
Unified CM for secure communications.
Update the Expressway Neighbor Zone to Unified CM to Use TLS
Note that Expressway will report that the Unified CM zone is active even while it is communicating with Unified CM
over TCP. The changes below are necessary to enable communications over TLS.
over TCP. The changes below are necessary to enable communications over TLS.
On Expressway:
1.
Go to Configuration > Zones > Zones, then select the zone to Unified CM.
2.
Configure the following fields:
SIP section
Port
5061
Transport
TLS
TLS verify mode
On
Authentication trust mode
Off
Leave other parameters as previously configured.
3.
Click Save.
Verify That the TLS Connection is Operational
To verify correct TLS operation, check that the Expressway zone reports its status as active and then make some test
calls.
calls.
1.
Check the Expressway zone is active:
a.
Go to Configuration > Zones > Zones.
b.
Check the SIP status of the zone.
If the zone is not active, try resetting or restarting the trunk again on Unified CM.
2.
Make a test call from a system routed through an Expressway to a Unified CM phone.
3.
Make a test call from a Unified CM phone to a system routed through an Expressway.
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Cisco Expressway SIP Trunk to Unified CM Deployment Guide
Connecting Expressway to Unified CM Using TLS