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Remote Extensions
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complex1 Offline
3CX Adv. Cert. Engineer

Posts: 1,536
Joined: Jan 2014
Reputation: 45
Post: #2
RE: Remote Extensions
(12-09-2022 08:58 PM)STDSupport Wrote:  Hello everyone,

I have about 6 phones at a remote office and having a small issue. These phones register back to the parent company's PBX which are both protected with firewalls on each end. For the most part the phones during the day stay connected, voice quality is excellent, but at times especially when I come into work in the morning 1 or more phones is actually indicating Unreachable. It's as if the phones have gone to sleep and once staff on the remote end start working the phones then are reachable again. However I were to call the extension when its indicating "Unreachable" will automatically send me to voice mail.

UDP Server expires is at default 3600, Keep Alive - 30 secs, Subscription period 1800. Now one thing I have mentioned is the Yealinks are registered on an iPtitomy PBX and it always seems one of the 6 phones, is indeed an iPitomy phone it never appears to disconnect. Any suggestions are gladly welcomed, I checked the PBX and it has set Max Length of registration 7200, Default length of registration 120 and RTP Keep Alive 30.


Try using STUN to keep the phones alive.

Kind regards,

I am not an employee of Yealink.
Dutch is my native language, not English. Apologies for my imperfect grammar.
Please do not send unsolicited PM messages. I will not answer them.
12-09-2022 11:42 PM
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Messages In This Thread
Remote Extensions - STDSupport - 12-09-2022, 08:58 PM
RE: Remote Extensions - complex1 - 12-09-2022 11:42 PM

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