User Guide ISDN Terminal Adapter MTA128ST-USB

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MultiModemISDN User Guide
Command: !Z=n
Function: Rate Adaption Protocol
Values: n = 5, 6, 9, or 12
Default: !Z=9 (ML-PPP)
Description: Selects rate adaption protocol used to communicate with another TA. The
local and remote terminal adapters must be set to the same protocol for
communication to take place.
!Z=5 V.120 protocol
!Z=6 V.110 protocol*
!Z=9 ML-PPP protocol
!Z=12 X.75 protocol
* The MTA128ST-USB is manufactured in two builds. To determine the build of your terminal
adapter (TA), issue the ATI2 command in a terminal window. If the TA responds to the command
with MTA128ST-USB, then it supports V.110. If your TA resonds to the ATI2 command with
MTA128ST-USB-RC, V.110 support is not available. The MTA128ST-USB-RC will return ERROR in
response to the !Z=6 command.