CUCM SIP Trunks

[Steven Stuart]

Hi, I have a CUCM version 10.5 connected to a VCS-C server. I have them connected via a SIP trunk. Can someone please let me know how many calls can be made over that SIP trunk? What is the capacity of the SIP trunk? I have searched around the internet and I have come up with nothing. Thanks

[Terry Cheema · Accepted solution]

Hi Steven,

A SIP Trunk is a logical entity and not a physical circuit. It's there for signalling transactions between the CUCM and the far end. The actual RTP audio flows between the end points.

As far as I am aware there is no such limits defined for SIP Trunks. The call capacity would depend on the  actual bandwidth available of the IP circuit you have allocated to the voice traffic or any CAC policy etc.

-Terry

[Steven Stuart]

Hi Terry,

Thanks for your help. I had forgot about the endpoints connecting directly so that RTP audio doesn't connect over the SIP trunk. It's no wonder why I couldn't find any documentation on this.

[Terry Cheema]

Not a problem Steven glad that helped.

-Terry