Nortel RLC Installation And Administration Manual page 139

June 2005
If you have enough data ports available on your Remote Gateway 9150
unit, configure ATA data adapters supported by the RLC as data ports on
the host PBX. If you do not have enough data ports available, you can set
up ATAs on voice ports on the host PBX.
Note: Remote Gateway 911x series units do not support data adapters.
Fax relay support
You can use the following compression algorithms for fax transmission:
G.711
If you select G.711, then faxes are transmitted at 64 Kbps. In this mode, the
fax protocol is not interpreted. Therefore, all non-standard fax features are
supported regardless of the manufacturer.
G.729A/Fax
If you select G.729A/Fax, then the fax protocol is interpreted, and the fax
modem is demodulated in an attempt to reduce the amount of bandwidth
that is consumed. In this mode, the fax transmission is restricted
automatically to 9.6 Kbps. The G.729A/Fax algorithm provides more
bandwidth efficiency at the expense of greater protocol-sensitivity and
potentially lower fax speeds.
Note: Error Correction Mode (ECM) is automatically disabled during fax relay.
Configuration for fax relay support
On the host PBX, you must configure the TN associated with any remote analog
ports (ATA or the Remote Gateway 9150 unit analog port) as a voice port.
Do this by ensuring that the remote ATA devices, or the Remote Gateway 9100
Series analog port, map to an ATA port on the RLC. ATA ports were introduced
in release 22 of Meridian system software. The ATA is in the data port range, but
the class of service treats the TN as a voice TN.
You can map remote analog ports (that are in the voice port range on any
supported release of Meridian software) to non-ATA voice ports on the RLC.
RLC Installation and Administration Guide
Configuring the host PBX for the RLC
113