[OpenSIPS-Users] SIP IM with exclusive User-Agent

[Dani Popa]

Hi,

How can i send MESSAGES only to users who are registered with exclusiv 
User-Agent. I mean, A is registerd with User-Agent Jitsi and B is with 
jitsi and Cisco phone. If A try to send messages to B, i need that 
messages to be sent only to B on Jitsi, because cisco will replay with 
"Not Impelemented" and opensips will reply to A with "Not Implemented".

Thanks,
Dani