Yealink T48S Phones constantly disconnecting from system

[RubenPena]

We have a small office with 5 phones. 4 of the 5 phones are constantly losing their connection. When this happens they can call out but can't receive calls. Worst part is that this affects the main receptionist phone. When I look at the activity log I see the following:

05/25/2018 11:02:50 AM - There's another STUN server that resolves to the same IP: 158.69.11.6:3478/UDP fk=0; ignored
05/25/2018 11:01:07 AM - [CM503003]: Call(C:220): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 11:00:43 AM - [CM503003]: Call(C:220): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5488
05/25/2018 10:56:02 AM - [CM503003]: Call(C:219): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 10:55:46 AM - [CM503003]: Call(C:219): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5488
05/25/2018 10:47:05 AM - [CM503003]: Call(C:217): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 10:46:57 AM - [CM503003]: Call(C:215): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 10:46:32 AM - x-call-control DROP: call is not found: zv3YqTLHEMk3FrN4QnAo8w..;from-tag=1c73b44b;to-tag=fdefb219
05/25/2018 10:46:31 AM - [CM503003]: Call(C:216): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5488
05/25/2018 10:46:31 AM - [CM503003]: Call(C:216): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Cancelled/INVITE from 70.120.249.221:5065
05/25/2018 10:46:28 AM - [CM503003]: Call(C:215): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5488
05/25/2018 10:46:26 AM - [CM503003]: Call(C:213): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 10:46:07 AM - [CM503003]: Call(C:212): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 10:46:04 AM - x-call-control DROP: call is not found: moCtd4Vk0vDJp_UOMBnkRw..;from-tag=8a11527d;to-tag=12a1dc69
05/25/2018 10:46:03 AM - [CM503003]: Call(C:214): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5488
05/25/2018 10:46:03 AM - [CM503003]: Call(C:214): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Cancelled/INVITE from 70.120.249.221:5065
05/25/2018 10:46:01 AM - [CM503003]: Call(C:211): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 10:45:59 AM - [CM503003]: Call(C:213): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5488
05/25/2018 10:45:52 AM - [CM503003]: Call(C:210): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 10:45:41 AM - [CM503003]: Call(C:212): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5488
05/25/2018 10:42:50 AM - There's another STUN server that resolves to the same IP: 158.69.11.6:3478/UDP fk=0; ignored
05/25/2018 10:39:50 AM - [CM503003]: Call(C:209): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 10:39:24 AM - [CM503003]: Call(C:209): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5488
05/25/2018 10:38:06 AM - [CM503003]: Call(C:208): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 10:37:55 AM - [CM503003]: Call(C:208): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5488
05/25/2018 10:22:50 AM - There's another STUN server that resolves to the same IP: 158.69.11.6:3478/UDP fk=0; ignored
05/25/2018 10:02:50 AM - There's another STUN server that resolves to the same IP: 158.69.11.6:3478/UDP fk=0; ignored
05/25/2018 9:42:50 AM - There's another STUN server that resolves to the same IP: 158.69.11.6:3478/UDP fk=0; ignored
05/25/2018 9:22:50 AM - There's another STUN server that resolves to the same IP: 158.69.11.6:3478/UDP fk=0; ignored
05/25/2018 9:02:49 AM - There's another STUN server that resolves to the same IP: 158.69.11.6:3478/UDP fk=0; ignored
05/25/2018 8:42:49 AM - There's another STUN server that resolves to the same IP: 158.69.11.6:3478/UDP fk=0; ignored
05/25/2018 8:42:46 AM - [CM503003]: Call(C:206): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
05/25/2018 8:42:21 AM - [CM503003]: Call(C:206): Call to <sip:[email protected]:5060> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5488
05/25/2018 8:22:49 AM - There's another STUN server that resolves to the same IP: 158.69.11.6:3478/UDP fk=0; ignored

Rebooting fixes the problem temporarily. Would like to find a permanent fix.

This is a 3CX v 15.5 install on Google Cloud.

 

[Marari]

Are all phones being provisioned via STUN?
If so, you may want to get yourself a SBC.

https://www.3cx.com/docs/3cx-tunnel-session-border-controller/

 

[leejor]

If you don't use an SBC, then the first step is to confirm that each set has a unique local port assigned. (not all using port 5060). Even doing this doesn't guarantee that it will be problem free. The type of router being used at the site can make a difference. A check of the 3CX Activity Log after each set attempts a registration will show how 3CX "sees" each set. It should be as PublicIP: port, with each port being unique.

As suggested, the best solution is to use an SBC.

 

[Saqqara]

check out https://www.3cx.com/community/threa...etgear-nighthawk-x4s-d7800.54620/#post-225296, explains how to configure the phones for stun use and the ports setup for each phone

Or use a SBC server as mentioned above

 

[YiannisH_3CX]

Hello @RubenPena

You may also find the following tutorial useful: https://www.3cx.com/3cxacademy/videos/intermediate/configuring-remote-extensions/