Is it possible to place a SIP call to a SIP/SCCP endpoint that is registered with CCM from a SIP softphone (that is not registered with CCM). Basically, I am just trying to dial a SIP URI to call a phone that is registered with CallManager.
For example, I am trying to use a Linux-based softphone - Ekiga - to dial sip:email@example.com. 50956 is an extension assigned to a Linksys SIP phone that is registered to CCM 10.244.2.10. Ekiga is not registered with CCM.
Whenver I try do dial this URI, Ekiga sends a SIP INVITE to CCM UDP port 5060, which then responds with:
SIP/2.0 503 Service Unavailable
I have also had the same result with the SIP cli-based testing tool sipsakk.
Does anyone know how to make this work?
If so, can I also dial SCCP endpoints via a SIP URI (and the B2BUA functionality in CCM will handle the SIP/SCCP signaling)?
I have been playing around with CCM 5.1 for a few weeks but have been unable to find any documentation about this.