Discussion topic: Unable to raise SIP ALG/MAP-T Issues
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‎10 Dec 2024 10:01 AM
Hi,
My backround is IT, I work with VoiP and networking everyday.
Currently having an issue getting my work VoiP phone to pass voice traffic. We have FTTP Gigabit using the SR213 and it's woefull admin panel.
When using the form linked elsewhere to raise a VPN issue (its not a VPN issue but others have had success asking for SIP ALG and MAP-T to be turned off by using it) they are unable to link my mySky login to my account, even though the broadband services are there. This is also backed up by the fact that if I try to use the broadband checker tool, it says there is a probem with my account. I've tried to walk through this with telephone support but they were recommending redownloading the app, using a different browser etc. I've tried this through Chrome and Firefox to rule out a Web engine issue and on an iPhone and Android phone to rule out an app issue. I've recieved a text last night saying the issue is fixed, its not.
The real issue that I need to get fixed though is that I have a SIP VoiP phone that connects back to an 3CX server located at my office. After the update the router recieved on the night of 5/12/24 this no longer works. The phone will register but will not pass the packets used for actual calls.. Looking at Wireshark, on both home and work networks, the packets are not getting passed the Sky SR213. I've also tried to raise this via phone support but I was told they don't have any idea what I am talking about.
Self troubleshooting wise, if I run the phone through a different connection, everything works fine. I have confirmed this using a phone hotspot and a non sky connection. I have also used a different model handset to rule out feature depreciation.
I need to escalate this issue as 1st line support via phone calls are unable to understand the issue to actually resolve.
Thanks
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‎11 Dec 2024 12:25 PM
Posted by a Sky employeeGlad to hear your SIP issue has been resolved.
So this seems to be a new bug recently introduced with the SIP ALG function in combination with MAP-T, although not directly an issue with MAP-T itself. The good news is that it will be fixed in due course, along with the fragmentation issue impacting VPNs; disabling MAP-T will not be a long-term solution.