User`s manual

Mediant 2000 & TP-1610 & TP-260
SIP User's Manual 350 Document #: LTRT-68805
Table C-8: 4xx SIP Responses (continues on pages 349 to 350)
4xx Response Supported Comments
420 Bad Extension Yes
The
gateway does not generate this response. On reception of
this message, before a 200OK has been received, the gateway
responds with an ACK and disconnects the call.
480
Temporarily
Unavailable
Yes
If the
gateway receives a 480 Temporarily Unavailable
response, it notifies the User with a Reorder Tone.
This response is issued if there is no response from remote.
481
Call
Leg/Transaction
Does Not Exist
Yes
The
gateway does not generate this response. On reception of
this message, before a 200OK has been received, the gateway
responds with an ACK and disconnects the call.
482 Loop Detected
Yes
The
gateway does not generate this response. On reception of
this message, before a 200OK has been received, the gateway
responds with an ACK and disconnects the call.
483 Too Many Hops
Yes
The
gateway does not generate this response. On reception of
this message, before a 200OK has been received, the gateway
responds with an ACK and disconnects the call.
484
Address
Incomplete
Yes
The
gateway does not generate this response. On reception of
this message, before a 200OK has been received, the gateway
responds with an ACK and disconnects the call.
485 Ambiguous Yes
The
gateway does not generate this response. On reception of
this message, before a 200OK has been received, the gateway
responds with an ACK and disconnects the call.
486
Busy Here
Yes
The SIP
gateway generates this response if the called party is
off hook and the call cannot be presented as a call waiting call.
On receiving this response, the
gateway notifies the User and
generates a busy tone.
487
Request
Canceled
Yes
This response indicates that the initial request is terminated with
a BYE or CANCEL request.
488
Not Acceptable
Yes
The
gateway does not generate this response. On reception of
this message, before a 200OK has been received, the gateway
responds with an ACK and disconnects the call.
C.5.5 5xx Response – Server Failure Responses
Table C-9: 5xx SIP Responses
5xx Response Comments
500 Internal Server Error
501 Not Implemented
502
Bad gateway
503 Service Unavailable
504 Gateway Timeout
505 Version Not Supported
On reception of any of these Responses, the GW
releases the call, sending appropriate release cause
to PSTN side.
The GW generates 5xx response according to PSTN
release cause coming from PSTN.