Remote SIP Workers on Avaya IX Workplace behind their consumer NAT (Only works after going on hold)

[Craig Foley]

Hey Everyone,

Like everyone else, our workers are trying to work remotely now.

We have licenses from Avaya to run Avaya IX Workplace and have the clients registering via SIP. We've been told to set up a VPN for the staff working remotely, but they don't need it for anything else but the phones - seems like a waste? Without the VPN, they can make/receive calls, but there's no audio, until they hit the pause/hold button. The person on the other end can then hear our system's on hold recordings and after taking the call back off hold, the audio then works in both directions? Everything works fine. Go figure?

Any suggestions on why that might be?

They're connecting via their home ISPs.

Cheers.

 

[chriscon]

Check your codecs and disable sip transformations on router.

 

[janni78]

Have you enabled Remote Extn on System -> LAN -> VoIP ?

"Trying is the first step to failure..." - Homer

 

[Craig Foley]

Thanks for the suggestions.

Remote Extn is enabled and the router isn't configured to be doing any magic. I might try another router and see what happens. It's just a consumer grade system.

I'm not sure about the codecs, but I disabled ulaw and alaw with no difference.

 

[Craig Foley]

No change with a different router either.

It working, after putting the call on hold, but then no longer working after subsequent holds, really throws me.

 

[Nutritional_Info]

What software release are they on?

 

[janni78]

What ports are you forwarding from the outside to the IP Office?

"Trying is the first step to failure..." - Homer

 

[Craig Foley]

Hey All,

Version: R11.0.4.0

Ports are
SIP 5060/61 TCP (But not trying with TLS) (Which works fine)
RTCP Monitoring 5005 TCP/UDP. (Don't think this is needed?)
RTP 46750-50750 UDP

There's also a SIP Trunk running through the same internet connection. I'm wondering if there's a conflict. I had tried a different RTP range of 55000-55500 but with no change in behaviour.

Do people have this working generally? Or do they all use VPNs?