Matrix NAVAN CNX200, System Manual

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Matrix NAVAN CNX200 System Manual 451
5.
Set the Data Redundancy Level to the desired value. Default: 3. This is a redundancy level for T.38
control data. Fax Data Level can be set from 0 to 7. Level 0 means no redundancy. Redundancy level
increases from 1 towards 7. The higher the level set, the slower would be the fax transmission.
EQM is directly proportional to this parameter. The higher the Fax Data Redundancy Level, the better the
EQM.
Pass Through Fax Codec
1.
When the Fax option is selected as Pass Through, you must configure the Pass Through FAX Codec as
supported by the Remote Peer. The Remote Peer may be a Proxy Server or a SIP Device.
You may select the Codec as G.711 A-law or G.711

Law

While sending a fax this Codec is sent in the re-
INVITE message to the Remote Peer, but while receiving a fax NAVAN will accept the fax with any Codec.
Pass Through Fax Rx Gain (SIP to Digital Trunk Call)
Configure this parameter if you selected Pass Through
73
as Fax Type, and the fax is to be received on a digital
trunk.
1.
Select the dB level for Data Gain (dB) from -31 to 31 dB. Default: -11 dB.
2.
Select the dB Level for Bypass Gain (dB) from -31 to 31 dB. Default: -9 dB.
Pass Through FAX Rx Gain (SIP to SLT Call)
Configure this parameter if Pass Through Fax is to be received on a fax machine connected to an SLT port.
1.
Select the dB level for Data Gain (dB) from -31 to 31 dB. Default: -11 dB.
2.
Select the dB level for Bypass Gain (dB) from -31 to 31 dB. Default: -9 dB.
73. Pass Through Fax packets are transported using RTP protocol. Normally, fax calls require less gain compared to voice calls. How-
ever, to improve fax reception, NAVAN enables you to configure gain settings for fax. Fax gain settings consist of Data Gain and
Bypass Gain. NAVAN supports Fax Receive Gain for SIP to Digital Trunk calls as well as SIP to SLT Calls.