SIP TRUNK from VCS to SBC

[Neobt]

Hi Community,

We are triying to implement a sip trunk directly from VCS to SBC without CUCM, once the sip trunk is established the calls are rejected with the error "Message Too big",  we have created a pipe limited to 64K reducing codec but sip invite still have several m lines within invite (video, ix, etc). Do you know if is there any way to remove these m lines from invite or set delay offer to outgoing calls to this zone?

Thanks in advance

[Eric Ingram]

Q: What side of the call presents the error message?? The SBC or VCS

Q: What type of SBC is deployed?? CUBE, Oracle etc

[Neobt]

Hi Eric,

The error message comes from SBC (Oracle) due all m lines and attributes within invite + SDP

[Nick Halbert-Lillyman]

You could try reducing the "SIP Max size" parameter on VCS under Configuration > Protocols > SIP

[Neobt]

Hi, 

Our main concern is that if we change this configuration it will apply to all SIP calls through VCS, so it may have impact on video calls