Specifications

AT&T IP Flexible Reach
Quintum Configuration Guide
Page 35 of 47
5.3 Configuration for Super G3 FAX
When there are Super G3 FAX machines on both ends of the call, the Tenor does not
detect "fax" and never switches from voice to T.38. This causes the FAX call to fail.
This issue can be circumvented by configuring the Tenor to use G.711 exclusively.
Unfortunately G.729 is the preferred codec for voice calls. On the Tenor it is not possible
to configure one analog line for G.711 and the remaining lines for G.729. All lines on the
Tenor use the same default codec values.
To help avoid the failure of outbound Super G3 FAX calls, it is possible to configure a
static route for specific telephone numbers or number patterns and associate the G.711
Codec with those numbers. So, if the customer has a SG3 fax machine attached to a
Tenor and makes calls to other SG3 machines at specific numbers, they can configure
G.711 for just those numbers. This does not work for incoming calls.
The following steps describe the additional configuration necessary for the Tenor to use a
Default Route with a G.711 Codec for known SG3 machines.
Step Description
1.
Connect to the Tenor AS from the Tenor Configuration Manager. Highlight the Tenor
AS switch and click on Connect.