Brekeke SIP Server Wiki

Here are some examples of error messages returned for rejecting calls. Error responses specified in the handling variable $action are sent to the request sender. The session for which an error response was returned will not be routed to the call destination.

For the response codes, refer to RFC3261.

Ex 1. Returning a “603 Decline” response if the callee isn’t registered

$request = ^INVITE
$registered = false

$action = 603

Ex 2. Returning a “486 Busy” response if the callee’s SIP URI is sip:user@host

$request = ^INVITE
$geturi( To ) = sip:user@host

$action = 486

Ex 3. Returning a “402 Payment Required” response if the callee’s name prefix is “9”

$request = ^INVITE
To = sip:9.+@

$action = 402

Ex 4. Returning a “404 Not Found” response if the caller’s name is “user”

$request = ^INVITE
From = sip:user@

$action = 404

 Ex 5. Returning a “403 Forbidden” response if the call is from an IP address with the prefix “192.168”

$request = ^INVITE
$addr = 192\.168\.

$action = 403

Ex 6. Returning a “406 Not Acceptable” response if the Content-Type header is  “application/text”

$request = ^INVITE
Content-Type=^application/text$

$action = 406

Ex 7. Returning a “503 Service Unavailable” response if the User-Agent header contains “TEST”

$request = ^INVITE
User-Agent = TEST

$action = 503

Ex 8. Returning a “483 Too Many Hops” response if the Max-Forwards’ value is 5 or less

$request = ^INVITE
Max-Forwards = ^[0-5]$

$action = 483

Ex 9. Returning a “480 Temporarily Unavailable” response from 0:00AM to 7:59AM

$request = ^INVITE
$time　=　^0[0-7]:

$action = 480

Ex 10. Returning a “400 Bad Request” response if the request method is SUBSCRIBE

$request = ^SUBSCRIBE

$action = 400