SIP Notify Answer event on T4 range

[DMC_Support]

The SIP Notify Answer event does not work on Yealink T4 phones running Firmware v80 or v81. It does work on Firmware v71.

Steps to reproduce (on a phone running v81 firmware):

1) Register a T4 (e.g. T41P) to an Asterisk system. I used FreePBX 13.14.0 with chan_pjsip.

2) Configure the SIP Notify as follows:

/etc/asterisk/sip_notify_custom.conf

[yealink-answer]
Event=>answer=true

3) Restart Asterisk

4) Place a call to the endpoint

5) Send a SIP notify to Asterisk:

pjsip send notify yealink-answer endpoint 1011

6) The phone will not do anything although it does send a 200 OK response to the Asterisk system.

I downgraded the firmware to v80. I had the same problem.

I downgraded the firmware to v71. The SIP Notify Answer event worked as expected.

I have tested this on a T41 and a T46.

Has this function been deprecated or changed or is this a bug ?

Please let me know if you require any further information.

Colin
DMC

[Lucia_Yealink]

Dear DMC,

Thank you for your detail information.
It is a known issue, and we have released a new firmware version to solve it.
Please download the firmware in the link below and do test:
http://ftp.yealink.com/?ShareToken=E5750...75B8057E59

Any question, please let me know.

Best Regards
Lucia

[DMC_Support]

Just to confirm that the SIP Notify Answer event feature works on the firmware you provided.

Thank you for your help.

Colin
DMC