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D-Link DIV-140 User Guide 14
In this mode of fax communication, G711 codec is used. Device will automatically switch to G711 codec on detection of FAX tone from the FAX
machine.
In this mode of fax communication, T.38 codec is used. Device will automatically switch to T.38 codec on detection FAX tone from the FAX machine.
If both the modes of fax communication are selected then preference will be given to Fax Relay mode. Following (FEC, Packet Redundancy Level,
and Ellipsis) are configurable parameters for Fax Relay features.
This feature can be selected to activate forward error correction in T.38 Fax Relay communication.
This feature can be selected to activate packet redundancy in T.38 Fax Relay communication.
This feature can be enabled to activate newer version of T.38 Fax protocol corrigendum 1. By enabling this feature, device will be able to work with
newer version fax devices.
The device cancels the echo generated by the hybrid of local telephone interface and phone set so that the other party connected to the channel
will not hear the echo. The parameters associated with echo cancellation can be configured here. Note: The default values should be good enough
for most cases and it is recommended that you don’t change it without assistance.
Echo Tail Length: This specifies the time span over which echo is expected to arrive. Tail length of 4 ~ 8 milliseconds is good enough for most cases.
Range: 2 to 64 in steps of 2 (corresponding to 1 to 32 milliseconds). Default: 36 (i.e. 18 milliseconds).
This is used to properly align the delayed signal with reference signal. Range: 0 to 240 (corresponding to 0 to 30 milliseconds). Default: 0 (i.e. 0
milliseconds).
When this is enabled, the DIV-140 detects a silence interval and uses silence compression to save on bandwidth. This feature works irrespective
of the codec selected. Default: Enabled.
There are four modes in which DTMF can be transmitted.
• In Band Mode
• Out Of Band Mode
• Info Mode
• Auto Mode.
In In Band Mode, DTMF packets are sent in band. In Out Of Band Mode, DTMF packets are sent as RTP Packets with different payload type as
configured in DTMF Payload field. In Info Mode, DTMF packets are sent as SIP INFO Packets and in Auto Mode the mode of DTMF transmission
is selected automatically to In Band, Out Of Band or Info according to the remote ends capability. Default: Auto Mode.
Enter the payload type to use for out of band DTMF packets. Range: 96 to 127. Default: 101.
Fax Pass Through:
Fax Relay:
FEC:
Packet Redundancy:
Elipsis:
Echo Tail Length:
Echo Delay
Compensation:
VAD:
DTMF Mode:
DTMF Pay Load: