| 协议 | 参数 | 说明 |
| h.323 |
| h.323 v4 | itu-t | |
| h.450 | 被屏蔽 | 需局端支持 |
| h.225 | 支持 | |
| h.245 | 支持 | |
| h.235 | 支持 | |
| rcf-1889 | rtp/rtcp | |
| ip对ip | 支持 | |
| sip |
| rfc 3261 | | session initiation protocol |
| rfc 2327 | | sdp: session description protocol |
| rfc 3264 | | an offer/answer model with the session description protocol(sdp) |
| rfc 3265 | | session initiation protocol (sip)-specific eventnotification |
| rfc 3515 | | the session initiation protocol (sip) refer method |
| rfc 2976 | | the sip info method |
| rfc 2833 | | |
| rfc 3489 | | |
| rfc 3842 | | a message summary and message waiting indication event packagefor the session initiation protocol (sip) |
| rfc 3891 | | the session initiation protocol (sip) "replaces" header |
| rfc 3892 | | the session initiation protocol (sip) referred-bymechanism |
| draft-ietf-sipping-cc-transfer-04 | | session initiation protocol call control - transfer |