• Home
  • Sangoma Solutions
    • PBXact IPPBX
    • FreePBX IPPBX
      • The FreePBX Appliance
      • FreeHMS Hotel PMS
    • Sangoma Phones
    • Vega gateways
    • Zulu UC
    • Asterisk
  • Hardware & Phones
    • IPPBXs
      • Sangoma PBXact
      • FreePBX
        • Freepbx 60
        • Freepbx 100
        • Freepbx 300
        • Freepbx 1000
        • Sangoma Phones
      • Building FreePBX CallCenters
    • Voip Handsets
      • Sangoma System Handsets
      • Gigaset Pro
        • Gigaset Maxwell C DECT Desk Phone
        • Gigaset Pro R650H
        • Gigaset A540
        • Gigaset N720 IP PRO
      • Conference Phones
        • CP920 Conference Phone
        • CP960 Conference Phone
    • Headsets
    • Peripherals
    • Vega VoIP digital gateways
  • Lines & Support
    • Connectivity
      • Calls and Lines
        • Call charges and Bundles.
      • Fibre
      • EFM
      • FTTC
    • Support Contracts
      • Maintenance Terms & Conditions
    • System Monitoring
    • Submit Ticket
    • My Tickets
    • Number Porting
      • Porting Help
    • Case Studies
    • Major Fault Reports
  • Knowledge Base
    • Asterisk Support
    • Security
    • Knowledge Base
  • Contact
    • Invoice Payments
    • Your Rights under GDPR
    • Privacy Policy
  • Submit Support Ticket
  • Offers

One way audio with Yealink T23 and Gamma Sip trunks on Freepbx



We recently had a very puzzling issue with a customer who we supplied some T23 Yealink handsets. When making outgoing calls over Gamma sip trunks on their Elastix server we were getting one way audio, This was not an issue with their existing Snom handsets or a problem for internal or incoming calls over the same trunks. It also wasn’t an issue when using iax2 trunks.

It seems that there is some interoperability issue when using sip trunks and these handsets. and seems to be a little known issue as only affects a few operators.

It seems to addressed in 44.80.0.20 version software that isn’t on the Yealink UK site yet but is available here and should be loaded on all T23 handsets as they are being delivered as 44.80.0.5 firmware at the moment.

Share this:

  • Click to share on Twitter (Opens in new window)
  • Click to share on LinkedIn (Opens in new window)
  • Click to share on Facebook (Opens in new window)
  • Click to share on Google+ (Opens in new window)
Asterisk Support, Elastix Support, Knowledge Base, Support, Technical    Asterisk, digium, Elastix, freePBX, SIP, Technical, VOIP, yealink
Similar posts
  • Gigaset N870IP DECT — The Gigaset N870 Multicell System is an innovative break...
  • Sangoma Phone Firmware — This firmware version fixes a problem with the S400 and ...
  • CP920 Conference Phone — Yealink designs its audio conferencing solutions to suit...
  • CP960 Conference Phone — The Yealink CP960 is an enterprise-grade conference phon...
  • Gigaset A540 — A functional phone for those who value good design. T...
← Converting recordings to MP3 in Elastix and updating mysql CDR records
Nagios check_asterisk change for Asterisk 13 →
Sangoma

Links

  • Gradwell Account
  • Asterisk Forum
  • FreePBX Forum
  • FreePBX WIKI
  • IT Store
  • Blog
TunnelBear
Remote Access with TeamViewer choose "TeamViewer QuickSupport" when page loads
Yealink Reseller

Top Posts & Pages

  • Gigaset Maxwell C DECT Desk Phone  The DECT cordle…
  • Fortigate issues such as one way audio on Call Pickup With Hosted Asterisk and other problems.
  • ISDN alarms and what they mean.
  • IAX2 Peers going unreachable.
  • Gigaset N870IP DECT
  • Converting recordings to MP3 in Elastix and updating mysql CDR records
  • Simple Script to import Asterisk Database entries
  • Using Gmail to send Voicemail emails
  • 24x7 Asterisk server monitoring with Nagios.
  • Xorcom Astribank
2018 Cyber-Cottage.co.uk

EvoLve Pro theme by Theme4Press  •  Powered by WordPress
Sangoma, FreePBX and VoIP sales and support

Back to Top
This website uses cookies
This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish.Accept Reject Read More