Dialogic 05-2239-009 User Manual

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Dialogic Corporation

The most commonly used SIP request messages are:

INVITE

ACK

BYE

REGISTER

CANCEL

OPTIONS

For more information on specific SIP request types, see RFC 3261 at 

.

SIP response messages are numbered. The first digit in each response number indicates the type of 
response. The response types are as follows:

1xx

Information responses; for example, 180 Ringing

2xx

Successful responses; for example, 200 OK

3xx

Redirection responses; for example, 302 Moved Temporarily

4xx

Request failure responses; for example, 402 Forbidden

5xx

Server failure responses; for example, 504 Gateway Timeout

6xx

Global failure responses; for example, 600 Busy Everywhere

For more information on SIP response messages, see RFC 3261 at the URL given above.