Appendix A SIP Compliance
RFC 2543 and RFC 3261
RFC 2543 and RFC 3261
SIP Functions
Table | SIP Functions |
Function
Proxy server
Redirect server
Registrar server
Supported?
Yes (transaction stateful, parallel forking, and recursive)
Yes
Yes
SIP Methods
Cisco SPS supports five of the six methods used by SIP. It handles unknown methods such as
NEWMETHOD in the same manner as known methods such as OPTIONS and REFER.
Table | SIP Methods |
| |
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Method |
| Supported? | Cisco SPS Action |
|
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|
ACK |
| Yes | Forwards ACK requests.1 |
BYE |
| Yes | Forwards BYE requests. |
|
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CANCEL |
| Yes | Forwards CANCEL requests.2 |
INFO |
| Yes | Forwards INFO requests. |
|
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INVITE |
| Yes | Forwards INVITE requests. |
|
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NOTIFY |
| Yes | Forwards NOTIFY requests. |
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OPTIONS |
| Yes | Responds to OPTIONS requests. |
|
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REFER |
| Yes | Forwards REFER requests. |
|
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REGISTER |
| Yes | Supports both user and device registration. |
|
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SUBSCRIBE |
| Yes | Forwards SUBSCRIBE requests. |
|
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UPDATE |
| Yes | Forwards UPDATE requests. |
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|
1.The SPS can generate a local ACK for a
2.The SPS can generate a local CANCEL for a pending branch when it receives a 200 OK or 6xx response from the branch.
SIP Responses
Cisco SPS supports the following SIP responses:
•1xx
•2xx
•3xx
•4xx
Cisco SIP Proxy Server Administrator Guide
