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Yealinks T2xP do not respond to INVITE requests
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gtsionos Offline
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Yealinks T2xP do not respond to INVITE requests

We are using 3cx IP PBX and Yealink T26P and T28P IP phones.
Lately we have noticed the following issue from time to time:

During incoming calls, 6 (six) Yealinks which are members of a Ring Group receive the INVITE requests from the 3cx server, but they do not respond, neither with a provisional response (1xx) nor with a final. As a result, the server retransmits the INVITEs towards the Yealinks and the Yealinks never ring.

We have captured Wireshark traces on the 3cx server and we can see indeed that the INVITE requests leave the server and head towards the Yealinks.
The server and the Yealinks are within the same LAN, and the Yealinks were all registered by the time of the incoming call.

They are running and respectively.
Is this a known issue in the above versions?

Please let me know if you need additional information.
(This post was last modified: 01-23-2019 03:09 PM by gtsionos.)
01-23-2019 03:08 PM
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Yealinks T2xP do not respond to INVITE requests - gtsionos - 01-23-2019 03:08 PM

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