ADTRAN AOS Version R10.1.0 Command Reference Manual page 3491

Command Reference Guide
t38 v21-preamble-timeout <value>
Use the t38 v21-preamble-timeout command to set the maximum amount of time that the digital signal
processor (DSP) waits for peer device activity after starting to transmit a V.21 preamble event before
spoofing a response to the time division multiplexed (TDM) endpoint. Using the no version of this
command returns the timeout value to the default setting.
Syntax Description
<value>
Default Values
By default, the V.21 preamble timeout is set to 1700 ms.
Command History
Release A5.01
Functional Notes
This command is only available on AOS voice products that have Freescale DSP. This includes the Total
Access 900(e) Series, the NetVanta 6310/6330 Series, and the NetVanta 7000 Series products.
This command is used to help in troubleshooting T.38 interoperability issues. This command should only
be issued by advanced users or at the direction of ADTRAN technical support.
Usage Examples
The following example specifies the V.21 preamble timeout value as 2000 ms:
(config)#voice trunk t01 type analog supervision loop-start
(config-t01)#t38 v21-preamble-timeout 2000
60000CRG0-35E
The time, in milliseconds, that the DSP will wait for peer activity. Valid range
is 1 to 3000 ms.
Command was introduced.
Copyright © 2012 ADTRAN, Inc.
Voice Analog Trunk Command Set
3491