User guide

FAX BOARDS AND FAX DRIVERS INSTALLATION
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Configuring T.38 Fax Transport Parameters
Specify values for the following T38-specific parameters in the host_module.#/t38parameters section of the call
control configuration file.
Parameter Value
media_renegotiate_ delay_inbound
Specifies how long the system waits to renegotiate the media when the
system uses media renegotiation on inbound calls. If the system initially
negotiated the media for audio (as required for Cisco routers), this
parameter controls who in the network has the responsibility for
renegotiating the media to image on inbound calls.
Note
Dialogic recommends that you contact Technical Support before
attempting to use the renegotiation parameters.
Set this parameter to a negative value when a Cisco router has the
responsibility for renegotiating the media.
Set this parameter to 0 or a positive number when the user agent client
(UAC) has responsibility for renegotiating the media to image. Numbers
greater than 0 indicate the number of milliseconds for the system to wait
before attempting media renegotiation.
Set this parameter to:
-1 Disables media renegotiation on inbound calls. Use this value for
a Cisco router
0 Does not delay before attempting to renegotiate the media.
>0 Waits this number of milliseconds before attempting to
renegotiate the media.
Note
Set at least 500 msec of time difference between inbound and outbound
media renegotiate delay parameters.
Unit: ms
Range: -1 and 0 tp 60000
Value Type: decimal
Default value: 1000 (1 second).
media_renegotiate_ delay_outbound
Specifies how long the system waits to renegotiate the media when the
system uses media renegotiation on outbound calls. If the system initially
negotiated the media for audio (as required for Cisco routers), this
parameter controls who in the network has the responsibility for
renegotiating the media to image on outbound calls.
Note
Brooktrout recommends that you contact Technical Support before
attempting to use the renegotiation parameters.
Set this parameter to a negative value when a Cisco router has the
responsibility for renegotiating the media.
Set this parameter to 0 or a positive number when the user agent client