Send outbound faxes through different trunk

[Justin Richter]

I have a system using Cox as the SIP provider. They do not support T.38. I want to add a TRUNK like SIPTRUNK.com that does support T.38 and route all faxes through it. I have not been able to figure out how to get the fax server to use a different TRUNK. Does anyone know how to do this? Or am I going to have to switch my fax numbers over to extensions?

 

[nub]

outbound rules, rule name, Fax SIPTRUNK.com

Calls to Numbers with a length of 12
Route SIPTRUNK.com Strip Digits 2
Route Block Calls

Tell people that if they want to send a fax to number 555-555-1212 they need to dial 99-555-555-1212


that is how I do it anyway.

 

[YiannisH_3CX]

Or you can create an outbound rule with "Calls to numbers starting with prefix " 99 and strip the 2 digits.
Either method will work and "99" is an example. You can use any prefix you want.

 

[eddv123]

For Outbound FAX'ing with a FAX machine and 3CX you require an FXS supported gateway:
https://www.3cx.com/voip-gateways/

3CX on its own with a SIP trunk will only do inbound FAX to email.

 

[Justin Richter]

Thanks for the replies. I will try the prefix. Also, I do have an FXS supported gateway.

 

[leejor]

If you create an outbound rule, only applicable to the fax extension, and place it above the same rule all others use, then you would not require the prefix.

 

[eddv123]

What model and brand of gateway are you using?

 

[Justin Richter]

The prefix works great. Thanks!