Recent content by oliver.nash

  1. Calls not answering sporadically

    Thanks John, much appreciated. I'll double check the time config on each end test before setting up the SBC just to see if that solves it.

  2. Calls not answering sporadically

    Hi John, No, SIP-ALG has always been disabled on the router at site.

  3. Calls not answering sporadically

    Thanks Frederick. I'm reluctant to set up an SBC at this stage purely because it's only one phone at each site (distributed team) so even if this works it's not really a viable long term solution. Will definitely give this a go if other troubleshooting yields no results! Yep, SIP ALG is...

  4. Calls not answering sporadically

    Apologies, it's 2 Yealink IP phones + 2 provisioned with STUN via the 3CX app. Yes, different SIP and RTP are configured for each phone.

  5. Calls not answering sporadically

    All the phones are in STUN Yes, IP is bound to the MAC of the handset and relevant ports are forwarded to the handset.

  6. Calls not answering sporadically

    Hi there, Thanks for the link, here are the details: 3CX Version - Standard Annual 16.0.493 Server OS - Debian 9.11 Is the 3CX Server Hosted and where? - Hosted on Microsoft Azure IP Phone Make/Model/Firmware - Yealink T56A, Firmware 58.83.0.25 Provisioning Method: Local / VPN / STUN / SBC...

  7. Calls not answering sporadically

    Hi all, Firstly, apologies if this isn't supposed to be posted here. I'm having an issue whereby calls frequently aren't answered. I.e., the call rings through to the correct extensions/group but when the handset is picked up the call just keeps ringing. The phones in question are Yealink...
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