[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
T22P delay in placing / answering call
Author Message
glamb Offline
Junior Member

Posts: 1
Joined: Nov 2014
Reputation: 0
Post: #1
T22P delay in placing / answering call

We are setting up a 3CX platform and have a Yealink T22P on an external site for testing. The phone provisions and registers fine, but when placing a call from the extension, it takes ~4 seconds for the call to initiate and start ringing. Similarly, if we call the extension on its DDI, the handset starts ringing immediately but when the receiver is picked up, the caller continues to hear the ringing tone for ~4 seconds and then the call is finally connected. Once connected, it works flawlessly with excellent voice quality and no delay, nor do we have any one sided audio.

I've ran the firewall checker and all is fine, I've tried changing the 3CX STUN servers to others and disabling altogether and setting its external IP all to no avail. I've even opened our firewall to allow ALL IP traffic from the external IP of the handsets network.

There are no errors in the 3CX event log nor does the phone report any problems.

The 3CX Client (mobile and desktop) work fine from this external location as do other generic SIP clients.

Any assistance would be appreciated.
11-13-2014 06:17 PM
Find all posts by this user    like0    dislike0 Quote this message in a reply
James_Yealink Offline

Posts: 1,159
Joined: Aug 2014
Reputation: 8
Post: #2
RE: T22P delay in placing / answering call
Hi Glamb,

You siad that when placing a call from the extension of T22 on an external site it takes 4 seconds to start ringing? I think the ringing means ringback tone?

If yes, it's likely that phone don't receive a 180/183 message in time. Cause phone will play ringback tone when it receive a 180/183 message from server.

Can you get a pcap file? From the pcap trace we can know why phone takes so long to act.

11-14-2014 04:53 PM
Find all posts by this user    like0    dislike0 Quote this message in a reply
Post Reply 

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  T28P foward call doesn´t work with Tato 4 688 09-14-2020 03:49 PM
Last Post: complex1
  T22P Action URI ATrans and BTrans not working? DaveThompson 2 4,703 09-10-2019 10:47 AM
Last Post: DaveThompson
  T22P Stuck on FW justingoldberg 0 904 08-16-2019 01:19 PM
Last Post: justingoldberg
  Call forwarding with SIP devices Yealink and Cisco Call Manager CUCM joao.schlemm 7 11,056 08-03-2018 08:03 PM
Last Post: MarkLReed
Photo Yealink T21P E2 displays VIA and FROM headers on incoming call DmitryTsyganov 1 2,444 07-12-2018 07:28 PM
Last Post: johnkiniston
  T22P DSSKey linekey labels andcza 2 3,358 05-10-2018 06:02 AM
Last Post: andcza
  T22p does not get IP, and does not access the web interface even by manually config jason.luka 5 4,379 04-18-2018 01:29 AM
Last Post: Samuel_Yealink
  T22P -0 3CX firmware web server fails preterion 1 2,925 04-17-2018 02:35 PM
Last Post: will3
  T21P-E2 sends a CANCEL to put a call in hold Diego Juan 0 1,766 03-23-2018 02:52 PM
Last Post: Diego Juan
  Call Queue not working with the Grandstream UCM6202 ttran 8 9,507 03-04-2018 06:42 PM
Last Post: Adnanka

Forum Jump:

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

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