Hi Filippo,
Make sure that the port range for Cisco Expressway-E, Cisco VCS Expressway, or other edge traversal devices and firewalls allows the following:
>> Inbound SIP signaling traffic from the WebEx cloud over TCP for ports 5060 and 5061
>> outbound SIP signaling traffic to the WebEx cloud over TCP for the ports 5060 – 5070
Try reducing the SIP TCP timeout as explined in the following guide ( pages 11-12 )
http://www.cisco.com/c/dam/en/us/td/docs/telepresence/infrastructure/solutions/cmrcloud/CMRCloudEnterpriseDeployment.pdf
Manish
- Do rate helpful posts -