Asterisk not asnwer 200OK when receive the OPTION

Asterisk Asterisk SIP
1

I use Asterisk in version 13.38.1 and have a sip trunk with a operator. This operator work with Heartbeat. When I receive the OPTION in this trunk, my asterisk answer with 404 Not Found, but I need answer with 200OK. Following the option message and 404 not found messages:

How can I configure 200OK to answer to OPTIONS received?

2

OPTIONS:
OPTION:

From: sip:SBC@189.25.33.44;tag=m0pc3pnq
To: sip:200.27.181.45
CSeq: 1 OPTIONS
Contact: sip:189.25.33.44:36520;transport=udp;Hpt=8ea8_16;expires=65535
Accept: application/sdp
Max-Forwards: 70
Content-Length: 0

3

404 NOT FOUND:

From: sip:SBC@189.25.33.44;tag=m0pc3pnq
To: sip:200.27.181.45;tag=as44df6fc3
Call-ID: 0cm0r8rxtnvqrx0mpcn0vltcn0rvggco@44.33.25.189
[Generated Call-ID: 0cm0r8rxtnvqrx0mpcn0vltcn0rvggco@44.33.25.189]
CSeq: 1 OPTIONS
Server: Asterisk PBX 13.38.1
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Accept: application/sdp
Content-Length: 0

4

sip.conf:

[SBC]
type=friend
context=heartbeat
host=189.25.33.44
qualify=yes

extension.conf:

[heartbeat]
exten => _.,1,Answer()
exten => _.,n,Playback(ss-noservice)
exten => _.,n,Hangup()

5

OPTIONS should produce the same response as Dial, except for SDP handling.

With sensible use, 404 is just as good as 200, as both indicate that there is a valid SIP UAS there. However, if you need a 200, you must set up extensions.conf so that call will match a valid extension. You haven’t provided the request URI line, but assuming it is the same as the To: URI, there is no user part, which means that Asterisk will treat it as an attempt to access extension “s”. The extension just has to exist; it won’t get run, but priority 1 must exist.

6

From what you’re telling me, I should have an Asterisk extension answer the call and hang up. I have a doubt, in the To field, beacuse this just only have IP address. How should I do it in context?

For example:

[my-context]
exten => s,1,Answer()
…

7

I actually said.

What the extension actually does depends on what should happen if someone really calls it.

8

The Request URI is used, not the To URI. If no user portion is present then “s” is used.

9

I explicitly assumed that the request URI was the same as the To: one and silently mapped the empty user to “s”.

10

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