Microsoft Office Communications Server
From SubmitYourSIP
OCS is somewhat unique in the SIP space because it only supports TCP for transport instead of UDP, which is primarily supported by just about every SIP implementation. There are a few solutions out there to address this, but you have two basic options:
- Implement TCP support in your SIP stack/device. If it's open source, you have the choice. If not, beg your vendor.
- Implement a SIP Proxy that understands all transport protocols. The SER/Kamailio family is a popular choice for this approach. YMMV.
