Specifications

T.38 Fax Reference Manual (MGCP/NCS Version)
Mediatrix 4100
151
 To set T.38 fax transmission:
1. Enable T.38 by setting the dataIfCodecT38Enable variable to enable.
If you select the signalingProtocolDependent option of the voiceIfDtmfTransport variable (“
DTMF
Transport Type” on page 139), the signaling protocol has the control to enable or disable T.38.
2. Set the number of redundancy packets sent with the current packet in the
dataIfCodecT38ProtectionLevel variable.
This is the standard redundancy offered by T.38.
Available values range from 1 to 5, 3 being the default value.
3. Restart the Mediatrix 4100 so that the changes may take effect.
T.38 No-Signal
You can set the Mediatrix 4100 to send no-signal packets during a T.38 fax transmission. The Mediatrix 4100
sends no-signal packets if no meaningful data have been sent for a user-specified period of time.
 To send T.38 no-signal:
1. Set the period, in seconds, at which no-signal packets are sent during a T.38 transmission in the
dataIfT38NoSignalTimeout variable.
No-signal packets are sent out if there are no valid data to send.
2. Enable the sending of T.38 no-signal packets by setting the dataIfT38NoSignalEnable variable to
enable.