3cx Fax no longer working in SP5

[craigreilly]

We updated to SP5 yesterday and now we can not receive faxes via 3cx.
When I change the destination from a 3cx fax (8888) to a physical fax machine via "3cx Fax Extension" to GrandStream 704 it works fine.

 

[gschwab]

Upgraded to SP5 the day after it came out. Fax working fine here. sorry, I know that's no help.

 

[craigreilly]

Interesting - any chance you want to tell me your provider or codecs in use or other settings - reinvites, replaces, etc...

 

[gschwab]

Hi Craig.
My Voip Provider is Nexvortex and the assigned Codecs are
G-711 U-law
G-711 A-law
GSM-FR

supports Re-Invite: UN checked
supports replace: UN checked

 

[craigreilly]

Thanks George... I am having random luck with some fax services and not others.