DID not working with new SIP server

[hongkongpom]

Hi there,

I've been with Orbtalk in the UK for almost a year now & my DID has been working flawlessly with Voxalot.

Recently they changed to another SIP server and ever since then my DID doesn't ring through to my SPA3102 ATA.

If I bypass Voxalot & configure my ATA with the new SIP server and same username/password it rings properly. I put things back on Voxalot and the caller gets an error tone message in in their handset.

The only difference I can see it that the ATA allows me to put a proxy server in which Voxalot doesn't. Also Orbtalk have told me to use 711u as the codec.

I notice that the Voxalot codecs don't show 711u specifically but should this make a difference?

It shows registered in my account and I have tried de-registering it with Voxalot to no avail.

I am desparate because my aged Mother uses my DID to keep in contact with me.

Thankyou
hkp