[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.

Thread Closed 
Thread Rating:
  • 1 Votes - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Phones sending INVITEs for CallForward OFF and DND OFF
Author Message
derekb Offline
Junior Member

Posts: 3
Joined: Jan 2016
Reputation: 0
Post: #1
Phones sending INVITEs for CallForward OFF and DND OFF
Yealink Support:

We’re getting reports of various Yealink phones dialing feature codes randomly. We’ve done testing with T46G, but also with T29 and T27 phones which are producing the same results.

From what we have found, when a new phone is plugged into the network and provisioned via RPS and also when a phone auto-provisions via HTTP/HTTPS and something is updated such as a DSS key, the phones send an INVITE to the SIP Server with the Always Forward Off Code and also the DND Off Code.

I have made 2 PCAPs:
1. T46-boot.pcap – this is a factory default T46G plugged into the network, booting up, contacting RPS and downloading it’s provisioning for the first time. After provisioning is complete, you can see 2 INVITES for *73 and *79 (CF OFF and DND OFF code) sent to the SIP Server (pbx.empiresip.com).
2. T46-provison.pcap – this is a T46 that is already setup and working. Some DSS keys were changed by the SIP Provider. The phone reached the auto-provision interval and downloaded the new DSS Key layout. You can see 2 INVITES for *73 and *79 (CF OFF and DND OFF code) sent to the SIP Server..

These captures are on a T46G with Firmware Again, I have also tested this with other models such as T27 and T29 with the same result.

Why does this happen? This is very bad, as users may intentionally set DND or Call Forward and this gets TURNED OFF when provisioning occurs.

I have sent this request to support.usa@yealink.com just now. Please let me know if you would also like the PCAPs and where I should send them.

I also have made a trace from the phone while making the issue occur. I have the config.bin and syslog, etc if you would like me to send it.
(This post was last modified: 05-17-2016 03:34 AM by derekb.)
05-17-2016 03:13 AM
Find all posts by this user    like0    dislike0
Thread Closed 

Messages In This Thread
Phones sending INVITEs for CallForward OFF and DND OFF - derekb - 05-17-2016 03:13 AM

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Encryption utility for MP56 phones rtrefz 0 772 01-23-2023 10:15 PM
Last Post: rtrefz
  Configure Yealink Phones autoprov and Action URLS on demand adeo 1 4,401 11-16-2022 10:52 PM
Last Post: bomberyealink
  T4xx phones, load additional configuration after start possible? DanH 0 3,226 04-03-2020 04:02 PM
Last Post: DanH
  Phones volume keeps turning down John8675309 1 5,399 05-11-2019 05:38 AM
Last Post: Evan_Yealink
  how to erase SIP accounts on SIP-T3X Phones amvalente 6 24,152 01-22-2015 12:29 AM
Last Post: xpedeus_jc
  3CX and Yealink T-32G phones 805tech 2 10,949 12-04-2014 12:53 AM
Last Post: 805tech
  Auto provision for t26 phones mitcheal 1 9,640 08-06-2013 03:00 PM
Last Post: Yealink Support

Forum Jump:

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

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