Faxing over SCN

[avayastrongman79]

All...

We have a customer with 5 locations, using Small Community Networking. All 5 locations have IP500 (v1) control units, 6.0.14 SW.

In at least 2 of the sites, the customer is unable to fax at all from analog ports located on the ip500 control module. We've tested with equipment and analog phones and you can call out on those ports without impedance. The call looks normal when using SSA, and nothing really stands out when going through the monitor logs.

Anybody experiencing similar issues with 6.x and SCN?

Thanks for your input in advance.

 

[CarGoSki]

Is Fax Transport turned on the SCN IP trunk for both sites?

 

[avayastrongman79]

CarGoSki...

I logged into both sites, and Fax Transport is turned on, G.729 compression, Allow direct media path is ticked and call initation timeout is 4 seconds.

 

[CarGoSki]

Are your extension classification set to Fax Machine?

 

[CarGoSki]

Take that back. Looks like t38 is only for sip. You may want to set the compression to g.711. Faxes don't like to be compressed.

 

[CarGoSki]

You may be able to create a new voip trunk on both ends just for faxing between sites. You would then have to build some user short codes to use the fax ip trunk when a scn fax to fax call is dialed.

If you still need the bandwidth savings of g.729 calls then building the new fax g.711 ip trunk could be the solution.

 

[avayastrongman79]

CarGoski...

Thanks for the tips on the fax/scn. I think we may try and change the compression to g711 to see if that helps. I'll reply back with results in a couple of days on this post.

 

[CarGoSki]

Sure thing. Good luck.

 

[tlpeter]

Yes you need g.711 otherwise T.38 won't work.

Homo sapiens non urinat in ventum

honey, i fried the IP Office !!!

Sarcasm, it's only one of the services I offer.

 

[Bas1234]

Isn't it so when you have fax transport enabled and the SCN is set to G729 the fax still be send over G711, but you need a user SC on the fax with "Dial Fax" or tick the option "FAX Machine" one of the two not both. And after a fax handshake you should see the G711 change into T.38.

___________________________________________
It works! Now if only I could remember what I did...

Dain Bramaged
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[tlpeter]

I think that you could be right but then the codec set on the ipline must be set to automatic.
If it is set to G.729 then it does not work.

Homo sapiens non urinat in ventum

honey, i fried the IP Office !!!

Sarcasm, it's only one of the services I offer.