[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.
https://www.yealink.com/ydmp-freetrial-2020


Post Reply 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
T28P SIP header of death
Author Message
ldardini Offline
Junior Member
**

Posts: 15
Joined: Dec 2012
Reputation: 0
Post: #1
T28P SIP header of death
Just found a weirdness on the old Yealink T28P. If you add any kind of SIP header containing three consecutive commas, the phone seems to freeze and doesn't answer to SIP INVITE. Using asterisk dialects, Extension 104-DEVEL will not ring if called this way:

SIPAddHeader(Test: ,,,);
Dial(SIP/104-DEVEL);

It will ring if called this way:

SIPAddHeader(Test: ,a,a,);
Dial(SIP/104-DEVEL);

or if called this way:

SIPAddHeader(Test: ,,);
Dial(SIP/104-DEVEL);
04-20-2016 10:48 PM
Find all posts by this user    like0    dislike0 Quote this message in a reply
Karl_Yealink Offline
Super Moderator
******

Posts: 673
Joined: Apr 2015
Reputation: 5
Post: #2
RE: T28P SIP header of death
Thank you for your share, it's srange, we don't test like this.
Why do you want to test like this?
Do you test the same message to other phones?
And the firmware of the phones?
04-27-2016 05:50 PM
Find all posts by this user    like0    dislike0 Quote this message in a reply
ldardini Offline
Junior Member
**

Posts: 15
Joined: Dec 2012
Reputation: 0
Post: #3
RE: T28P SIP header of death
I came to this problem while working with Asterisk... an Yealink was called together to other phones requiring a custom SIP Header that happened to be in some case made of just commas.

I tested other brands and they will ring even if the weird SIP header is included in the INVITE.

The Yealink phone is running latest firmware.

Firmware Version 2.73.0.50
Hardware Version 1.0.0.39
04-28-2016 05:22 AM
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 - Firmware version advice Tato 2 14,897 09-11-2020 01:04 PM
Last Post: Tato
  T28P & T38G: Speed Dial delay or pause between DTMF yoda72 68 318,236 08-18-2019 09:06 PM
Last Post: HotlineExperts
  Disabled Keypad Tone - YEALINK T28P janduy.manzanos@gmail.com 10 30,671 05-16-2017 04:14 PM
Last Post: jolouis
  T28P re-register remotely LeeDraper 1 7,378 05-04-2017 11:55 AM
Last Post: Kevin_Yealink
  T28P Feb 14 date gcool 1 6,637 05-19-2016 05:29 PM
Last Post: Karl_Yealink
  T28P with Group Listen macbeto 5 12,851 03-18-2016 04:46 PM
Last Post: Karl_Yealink
  T28P dropping config randomly JeffWilkinson 2 9,969 02-15-2016 11:56 PM
Last Post: Frank Drews
  Auto Answer via SIP Header not working avayax 2 12,232 10-10-2015 05:13 PM
Last Post: avayax
  T28P indicating voicemails for each account dcfindlay 1 6,927 05-19-2015 05:04 AM
Last Post: James_Yealink
  T28P Arabic language ghomri28 4 16,902 03-02-2015 10:47 AM
Last Post: James_Yealink

Forum Jump:


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

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