SIP Release Notes | 2. Supported Features |
2.1.2.5.1 1xx Response – Information Responses
Table 2-6: Supported 1xx SIP Responses
1xx Response | Supported | Comments | |
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100 | Trying | Yes | The device generates this response upon receiving a Proceeding |
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| message from ISDN or immediately after placing a call for CAS |
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| signaling. |
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180 | Ringing | Yes | The device generates this response for an incoming INVITE |
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| message. Upon receiving this response, the device waits for a |
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| 200 OK response. |
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181 | Call is | Yes | The device doesn't generate these responses. However, the |
| Being |
| device does receive them. The device processes these |
| Forwarded |
| responses the same way that it processes the 100 Trying |
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| response. |
182 | Queued | Yes | The device generates this response in Call Waiting service. |
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| When the SIP device receives a 182 response, it plays a special |
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| waiting Ringback tone to the telephone side. |
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183 | Session | Yes | The device generates this response if the Early Media feature is |
| Progress |
| enabled and if the device plays a Ringback tone to IP |
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2.1.2.5.2 | 2xx Response – Successful Responses |
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| Table |
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| 2xx Response | Supported |
| Comments | |
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200 |
| OK | Yes |
| - |
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202 |
| Accepted | Yes |
| - |
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2.1.2.5.3 3xx Response – Redirection Responses
Table 2-8: Supported 3xx SIP Responses
3xx Response | Supported | Comments | |
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300 | Multiple | Yes | The device responds with an ACK, and then resends the |
| Choice |
| request to the first new address in the contact list. |
301 | Moved | Yes | The device responds with an ACK, and then resends the |
| Permanently |
| request to the new address. |
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302 | Moved | Yes | The device generates this response when call forward is |
| Temporarily |
| used to redirect the call to another destination. If such a |
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| response is received, the calling device initiates an INVITE |
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| message to the new destination. |
305 | Use Proxy | Yes | The device responds with an ACK, and then resends the |
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| request to a new address. |
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380 | Alternate | Yes | The device responds with an ACK, and then resends the |
| Service |
| request to a new address. |
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Version 6.2 | 123 | December 2010 |
