T.38 is not currently supported.
The OBi110 and OBi100 support faxing transparently using the G.711 algorithm optimized for fax (automatic).
In a syslog output I see a reference to "FAX MODE". Does the OBi have T.38 fax support or a fax server hiding inside waiting to be activated in a future firmware update? Or is this related to your above quoted statement?Syslog Capture:
<7> [SLIC] FAX MODE --- OFF 172.16.240.52 10/04 02:58:31.197