I'm attempting to put SIP trunks on an XTSc is there any programming that is needed other than what is in the tech manual. Seems there should be more than what I'm reading.

That should be enough as long as you have the corect software version and a voip card.

Will the XTSc support SIP trunks? Everything I've read is for XTS. I think it should be OK on XTSc,but want to make sure before diving in.

Yes it will but you need FP3.5 software or greater to make it work. I recommend uploading the latest version which is 4.016 .

Thanks for the help. Is that version of software on the vertical ftp. site