How get PJSIP_DIAL_CONTACTS via AMI/CLI/ARI

Asterisk Asterisk APIs
1

I was successfully able to execute the PJSIP_DIAL_CONTACTS(PJSIP/123) command from the dialplan. Now I’m trying to do the equivalent from the AMI. I’ve opened a telnet session, logged in, and typed the following command;

id: 123
action: getvar
variable: PJSIP_DIAL_CONTACTS(PJSIP/123)

This does not report any error, but returns an empty variable. I realize there is an action called PJSIPShowContacts but that returns all contacts, which I would prefer not to have to sort through.

If I could find the equivalent CLI command I could use the “action:command” parameter in the AMI. Is there a comparable CLI command? And worst case, if not, is it possible to get this information from the ARI? At the time I want to get this information there is no channel, so I can’t use the ARI’s getChannelVar function. I tried the following:

/ari/asterisk/variable?variable=PJSIP_DIAL_CONTACT%28123%29

but it too just returns an empty value

2

There is a difference between getting a variable value and making a phone call. The GetVar action retrieves the value of a channel variable or function return; it won’t start any call and also won’t retrieve any value in the way you are using it. If you want to start a call, use AMI and a local channel.

This is the most used and effective way to start a call using AMI.

3

I’m not trying to start a call, I’m just trying to lookup the contact string for a PJSIP extension. I have 3 devices registering on the same username/extension, so this PJSIP_DIAL_CONTACTS function gives me a string with the full URI of each device.

4

The documentation just say

Dial(${PJSIP_DIAL_CONTACTS(${EXTEN})}) To dial all the contacts associated with the endpoint, use the PJSIP_DIAL_CONTACTS() function

I If this function returns any specific channel variable or contact list, I have never seen any documentation about it. Try using DumpChan() to see if there is a variable with the value you need.

5

The dialplan interpreter is basically a text macro processor. When you call a dialplan function, ignoring any side effects, it simply returns a string, that you could have entered explicitly. This function just returns multiple dialstrings, separated by & in the same way as you would use & to construct an arbitrary set of destinations for simultaneous dialling.

6

I’m trying to get a list of all of the endpoints which have registered to a particular extension in PJSIP. I my case I have 3 phones all registered using extensions 123. If I originate a call to PJSIP/123 only one of them rings (per a different post).

Pjcolp suggesting using the PJSIP_DIAL_CONTACTS function to get a list of all of the URI’s to which I must connect. I tried this from within the dialplan and it works great. I split the returned string at & and I had 3 perfectly formatted URI’s to call my three phones!

Now I want to do this from the AMI, but there seems to be no way to call the PJSIP_DIAL_CONTACTS function from the AMI. There is an AMI command to list ALL endpoints, which buried in that output is the contact URI for each endpoint…but that’s a lot more work. I’m hoping to just call the PJSIP_DIAL_CONTACTS function from the AMI, but can’t figure out how.

7

You can read any dialplan function result from AMI, so you can use PJSIP_DIAL_CONTACTS. Treat it as a variable.

Why is it a different post? Starting new threads for what is the same requirement just confuses people, as they don’t see the full picture.

Extensions relate to the dialplan, not to pjsip.conf. Contacts register to AORs.

8

Could you give an example of how to call this from the AMI?

9

Different function, but the principle is the same: [asterisk-users] Get channel variables via ARI/AMI

10

There is no call in progress so no channel available…so can’t call that function. (This is AMI specific). I tried using the similar global variable command but it did not work.

11

I will have to use the “command” action, with “pjsip show endpoint 123” and then have to parse the output to get the contact lines.

I’m reaching the conclusion that I just can’t call the PJSIP_DIAL_CONTACTS function from the AMI (with no channel active).

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