[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 (and probably others) does not send DNS request after TTL timeout
Author Message
dnk2012 Offline
Junior Member
**

Posts: 5
Joined: Jan 2013
Reputation: 0
Post: #1
T28P (and probably others) does not send DNS request after TTL timeout
Yealink phones have a firmware bug. We have tested this on the model T28P phone, but believe it to occur in all yealink models.

When the phone does a DNS lookup it is ignoring the published "time to live" value. When the DNS lookup expires, the phone is supposed to do another DNS lookup. Instead, the phone caches the value of the domain name, and continue to use the name past its expiration.

Further, if a phone tries to register to a domain, and no answer is received, it should do another DNS lookup immediately.

Please find that attached file, which shows that after 2 minutes of TTL, the phone did not send another DNS request.


Attached File(s) Thumbnail(s)
   
(This post was last modified: 07-31-2013 01:22 AM by dnk2012.)
07-31-2013 01:21 AM
Find all posts by this user    like0    dislike0 Quote this message in a reply
Post Reply 


Messages In This Thread
T28P (and probably others) does not send DNS request after TTL timeout - dnk2012 - 07-31-2013 01:21 AM

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Request help with WH67 mcontour 2 3,666 04-28-2022 05:03 PM
Last Post: complex1
  DSS Page flip Timeout WadeR7464 0 1,943 04-19-2022 04:35 AM
Last Post: WadeR7464
Question why phone send gateway ip detect packet pig_tails 1 5,170 06-04-2021 08:38 PM
Last Post: KaithlynMoore
  Yealink w80: handsets do not send 100 trying bjorn.peeters 4 9,544 11-23-2020 03:09 PM
Last Post: bjorn.peeters
  DSSKEY - http GET request how to? Chiara 3 8,150 10-14-2020 01:13 PM
Last Post: Yisroel_MongoTEL
  T28p - Firmware version advice Tato 2 14,769 09-11-2020 01:04 PM
Last Post: Tato
Information Request: example .tar file openvpn kooskoets 5 16,002 07-13-2020 04:39 AM
Last Post: node
  Yealink Phone to Send Private IP Address on Register Ari 4 12,061 10-23-2019 10:04 PM
Last Post: Ari
  T28P & T38G: Speed Dial delay or pause between DTMF yoda72 68 315,904 08-18-2019 09:06 PM
Last Post: HotlineExperts
  Disabling screen timeout on T29G oliver@olivermarshall.net 1 10,433 05-24-2019 01:30 PM
Last Post: complex1

Forum Jump:


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

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