DTMF tones for VOIP

[#1]

I have 6 phones using VOIP, they are fine on another network but using plusnet they will not pass DTMF, so users cannot select option 1  etc during a call. Is there a setting in the router to change?

I called plusnet support only to be told they have not been trained in voip so cant do anything. No 2nd line support either

[#2]

Which router do you have ?

[#3]

thanks, Plusnet Hub two

[#4]

The only setting that relates to voip (sip) is SIP ALG on or off. Its in the advanced>firewall>configuration settings. I would normally suggest it should be off, try changing from whatever it is. I'm not sure it would affect dtmf signalling though....

[#5]

thanks I will try, but I have my doubts on that one. Had to change it on another router for a different purpose

thanks for your help

[#6]

I doubt it as well. I really can't see why dtmf signalling should be any different using plusnet.

I assume the plusnet connection is a similar speed and latency to the other which works ?

[#7]

yes much the same, they were using 4g previously

[#8]

Moderators Note

This topic has been moved from Broadband to Everything Else