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Full Version: Caller ID not correct when performing an attended transfer
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Hi,

We have a system in place using 3CX and a number of Yealink handsets including T26P, T32G, T38G and T20p. All are exhibiting the same behaviour.

If you perform a blind transfer the caller ID is passed to the receiving phone correctly. If you perform an attended transfer the caller ID of the intermediate phone is displayed on the receiving phone, even after the intermediate phone hangs up.

I have tested 3CX with other makes including Grandstream and Snom and they both work correctly passing the ID on both blind and attended transfers. In 3CX there is no way to transfer via the PBX itself and as such there is no work-around to solve this issue.

Having looked around and goggled this at some length there are a number of people that have noticed this issue but no resolution as been posted. I wondered if anyone on here had come up with a solution or spoken to Yealink about this directly?
Sorry. What is your firmware now?
We are running several types of handset - however, all are running latest firmware:

32.70.0.180 - 32G

9.72.0.30 - 20P

As examples the above two I have been using for testing and both were updated yesterday from the Yealink site.

Thanks, Tim
Support - Is this a known issue? I.e. Should this be working correctly?

I have seen a number of people on other forums mention this issue but no resolution. It would be good to know if this is actually a bug or a configuration fault.
Hi,

I managed to make it works using the "Caller ID Header" parameter of Yealink Phones. (Set to PAI in my case).

http://www.yealink.com/Upload/T2X/201311...Phones.pdf

note : working with Asterisk 1.8.X

./Kriss
Hi Kriss,

Thanks for the reply - I have tired different settings for "Caller ID Header" and none of them result in the required setting. On 3CX PAI just comes up as unknown caller.

Tim
Excellent. Those FW versions worked. Thanks!!

I have one more question. Since V12 of 3CX it does not seem to be possible to update phones to a firmware file provided.

Is there a way to bulk update phones over a network without using 3CX? We have around 100 phones to update.
Hi Tim,

I am still running v11, but I manually change the template file so that it points to the correct firmware that I want to run. As per the example below.

If you have the phones setup to autoprovison, then the next time they reboot, they will see that the firmware doesn't match and auto upgrade/ downgrade as required.

################################################################################​#######
## Configure the access URL of firmware ##
################################################################################​#######
{IF network=LOCALLAN}
{IF model=Yealink T32}
firmware.url = http://%%pbx_ip%%:%%pbx_http_port%%/provisioning/firmware/T32/32.70.0.198.rom
{ENDIF}
{IF model=Yealink T38}
firmware.url = http://%%pbx_ip%%:%%pbx_http_port%%/provisioning/firmware/T38/38.70.1.6.rom
{ENDIF}
{ENDIF}
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