[YMCS/YDMP Free Trial Program]Yealink would like to offer Free Trial Program of Yealink device management service for our current eligible customers. You can see the details below.

Post Reply 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
T20P/T26P audio problem on call transfer
Author Message
carlos.franco Offline
Junior Member

Posts: 8
Joined: May 2014
Reputation: 0
Post: #3
RE: T20P/T26P audio problem on call transfer
(05-08-2014 02:02 PM)Yealink Support Wrote:  >Why don't you use G711 codec?
Good question, but I'll answer with another one: Isn't it expectable that the phone should work with G722 ? The audio experience in G722 is very different from narow band codecs...

>This issue happens in two callers in Yealink Phones or from other
The problem happens when the two callers are Yealink Phones.
The other brands, like I wrote in the original post, doesn't have the problem. I they also use G722 (aastra and recent models of grandstream).

>I advise you ask your distributor for help and supply syslog level 6,
>config.bin and trace pcap to them.
They can submit your issue to the corresponding Yealink technical specialist and arrange the solvement asap.
I'll do that, but I was trying to reach Yealink directly as this problem is affecting 1800 yealink users, and it happens very often because it's very common assistants (T26P models) to transfer calls to technical guys in their department and the result is calls should be hung bercause we can't understand what our client is saying...
I'll post traces from phone here too.

Thank you for your quick answer and recommendation.

Best regards,
Carlos Franco
How to Get the Correct Syslog, Config.bin and Trace

Hello again,

Here are the trace I will send to my distributor.

The event sequence that generate this trace was:

1. PhoneA calls PhoneB - both audio feeds are OK;
2. Phone B hits * key to transfer the call, but as no number is dialed,
the transfer function times out and returns to call between PhoneA
and PhoneB - both audio remains OK;
3. Phone B hits * key to transfer the call and after 2 seconds hits
again * to abort the transfer:
- audio from phone B to Phone A remains good, but audio from
phone A to phone B is completly corrupted;

In this example, the call transfer isn't completed (so I don't need to
collect packet from a third phone) but the effect is the same: Phone
C (to where the call is transfered) will not be able to understand
what phone A is saying.

thanks again for the help you could give me (maybe redirecting this information to your technical dept).

Best regards,

Carlos Franco

Attached File(s)
.txt  Event_Sequence_phoneA_PhoneB.txt (Size: 688 bytes / Downloads: 3)
.zip  PhoneA-files.zip (Size: 351.57 KB / Downloads: 3)
.zip  PhoneB-files.zip (Size: 325.71 KB / Downloads: 1)
(This post was last modified: 05-08-2014 05:34 PM by carlos.franco.)
05-08-2014 05:01 PM
Find all posts by this user    like0    dislike0 Quote this message in a reply
Post Reply 

Messages In This Thread
RE: T20P/T26P audio problem on call transfer - carlos.franco - 05-08-2014 05:01 PM

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Call forwarding with SIP devices Yealink and Cisco Call Manager CUCM joao.schlemm 8 26,454 12-27-2023 06:49 PM
Last Post: nolto
  Possible upgrade T26P Zdenda_Enter 3 5,320 07-12-2022 04:23 PM
Last Post: Zdenda_Enter
  T26P failed to register with TLS transport tvt 0 3,747 10-29-2021 02:58 PM
Last Post: tvt
  Lost my configuration trying to fix a static audio problem nestman 0 4,277 06-22-2021 06:33 AM
Last Post: nestman
  Multiline Transfer T29G pedro_indy 0 5,503 11-27-2020 01:11 AM
Last Post: pedro_indy
  T26P Can not upgrade firmware martien.poels@bank2loyalty.com 2 10,084 09-21-2020 05:16 PM
Last Post: complex1
  T28P foward call doesn´t work with Tato 4 12,351 09-14-2020 03:49 PM
Last Post: complex1
  T28P LDAP Problem oguzhan 1 8,111 06-10-2020 01:14 PM
Last Post: beldimon
  "On hook" event problem Rafal 6 17,708 03-26-2020 03:35 AM
Last Post: Normfred
  Attended transfer not working T29G chysky@slany.cz 1 6,698 02-11-2020 02:48 PM
Last Post: chysky@slany.cz

Forum Jump:

User(s) browsing this thread: 1 Guest(s)

Contact Us   Yealink   Return to Top   Return to Content   Lite (Archive) Mode   RSS Syndication