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Blind transfer not working on hangup bug - Printable Version

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Blind transfer not working on hangup bug - mrabbitt@clarkecounty.gov - 08-20-2019 06:45 PM

On my T52S phones running 84.0.10, I've noticed a bug where if I hang up the handset at a specific time to complete a blind transfer, the phone instead behaves like it's in an attended transfer. This causes another major issue which I'll get to after explaining the first one.

Here are some relevant config changes present on my phones:
Semi-attended transfer is disabled
Time Out for Dial Now Rule is set to 1

Reproducing the bug:
1. Answer a call taking the handset off hook
2. Press "Transfer" button and enter extension you want to transfer to
3. Hang up the handset after the Dial Now Rule timeout but before the transfer-to extension starts ringing

What you would expect to happen here is to have the call blind transfer. Instead, what happens is the phone goes into some kind of invalid attended transfer state where if you hang up the Yealink phone, the extension you transferred to will continue to ring. Once that call gets picked up or goes to voicemail, you will hear the audio play on the Yealink phone even though it is on the home screen and no longer in a call.

If you do the transfer and hang up before the Dial Now Rule timeout finishes or after the transfer-to extension starts ringing, the call blind transfers correctly.


RE: Blind transfer not working on hangup bug - Phil_Yealink - 12-04-2019 04:33 PM

(08-20-2019 06:45 PM)mrabbitt@clarkecounty.gov Wrote:  On my T52S phones running 84.0.10, I've noticed a bug where if I hang up the handset at a specific time to complete a blind transfer, the phone instead behaves like it's in an attended transfer. This causes another major issue which I'll get to after explaining the first one.

Here are some relevant config changes present on my phones:
Semi-attended transfer is disabled
Time Out for Dial Now Rule is set to 1

Reproducing the bug:
1. Answer a call taking the handset off hook
2. Press "Transfer" button and enter extension you want to transfer to
3. Hang up the handset after the Dial Now Rule timeout but before the transfer-to extension starts ringing

What you would expect to happen here is to have the call blind transfer. Instead, what happens is the phone goes into some kind of invalid attended transfer state where if you hang up the Yealink phone, the extension you transferred to will continue to ring. Once that call gets picked up or goes to voicemail, you will hear the audio play on the Yealink phone even though it is on the home screen and no longer in a call.

If you do the transfer and hang up before the Dial Now Rule timeout finishes or after the transfer-to extension starts ringing, the call blind transfers correctly.



Dear Customer ,

Good day ,this is Phil from Yealink Technical Support Team ,nice to meet you .

Please first to upgrade the version of T52S to newest version ,you can get newest firmware version from following address:

http://support.yealink.com/documentFront/forwardToDocumentDetailPage?documentId=185

Try to reproduce the issue and see if it is still exits .

If yes ,

(1)Please help to duplicate the issue and show us a video so that we can have a better understanding of problem scenarios .

(2)Please provide the diagnostic files including A/B/C (A calls B ,B answer the call ,A and B establish the call ,B bind transfer A to C)for further analysis ,thanks in advance .

Here is a FAQ about how to get files :http://support.yealink.com/faq/faqInfo?id=707

Best Regards,

Phil