anyone knows if there is a configuration of a Cisco Router with voice functionalities to act as a SIP phone?
A customer's scenario is the following: - the customer has no.5 SIP phone - each phone has its own number registered to an external SIP provider - external SIP provider can't establish a trunk SIP with customer router that is a Cisco 2821 with voice functionalities
I am wondering if a Cisco 2821 router could do the following: - register IP phones on router (with SIP or SCCP)
- register SIP lines provided by the external VoIP provider directly from router - route the calls from ip phones to SIP PBX of my provider through Cisco 2821 based on some policies defined on the router without configuring a SIP Trunk.
In this way the router behaves, in the VoIP world, similarly when running NAT for IP address.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
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This provides an easy to use form where you simply answer a few
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