Asterisk initiate call through sip notify message

Question

I have a Yealink ip phone on my desk and I want to remote control it so that I can place the calls from my computer instead than by typing the numbers directly on the phone. This link explains how to do it:

How to dial or place a call using remote control | Yealink Support

There are 2 ways of doing it. One is sending a http request to the phone. And the other option is by sending a SIP notify message.

A) Sending HTTP request (Works!)

1. First make sure the phone is configured to allow remote connections

2. Then just make this wget request

   wget --user admin --password PASSWORD_PHONE  http://IP_OF_PHONE/servlet?key=SPEAKER
   

After making that request the phone speaker key is pressed!

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B) Sending SIP Notify Message (Does NOT work)

This is the option I want to use because I do not want to store usernames and passwords. Also the ip address of the phone might change. Anyways here is what I have tried and for some reason I cannot make this option work:

1. I perform the first step that I did on part (A) by allowing the phone to be remote controled.

2. I connect the phone to my asterisk server and make sure it is connected.

3. Now that the SIP peer Eduardo is connected I need to send it a SIP Notify Message with the body containing key=SPEAKER.

4. I open /etc/asterisk/sip_notify.conf and add the following context:

   [test] Event=>ACTION-URI Content=>key=SPEAKER

5. I restart asterisk because I do not know how to reload sip_notify.conf

   asterisk -rx "core restart gracefully"
   

6. Then on asterisk CLI I type the following command in order to send the sip notify message:

   sip notify test Eduardo
   

7. when I run that command asterisk says: Sending NOTIFY of type 'test' to 'Eduardo' but the phone never presses the SPEAKER key! What could I be doing wrong?

8. Here is the sip message captured by Wireshark!

9. Even though I am following the directions the SPEAKER key is not being pressed! What could I be doing wrong?

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Helpful Info:

Answer 1

After trying all day I was able to figure it out! I was missing the content-type header!

Anyways here is the solution:

1. sip_notify.conf file should contain:

   [test]
   Content-Type=>message/sipfrag
   Event=>ACTION-URI
   Content=>key=SPEAKER
   

   The line Content-Type=>message/sipfrag is very important!

2. Restart asterisk so that sip_notify.conf reloads

   asterisk -rx "core restart gracefully"

3. Now type this asterisk command:

   sip notify test Eduardo
   

   where Eduardo is the SIP peer you want to send the key to

4. A list of all the available keys can be found in here:

   http://support.yealink.com/faq/faqInfo?id=173