References – AC International MTA128ST-USB User Manual
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Chapter 2 - Hardware Installation
P1
Data Protocol
Lights in combination with P2 and 128 LEDs to indicate which data protocol
(V.110 [build MTA128ST-USB only] , V.120, X.75, PPP, MLPPP) is in use as shown in the
table below.
P2
Data Protocol
Lights in combination with P1 and 128 LEDs to indicate which data protocol
(V.110*, V.120, X.75, PPP, MLPPP) is in use as shown
below:
Data Protocol 128 LED P1 LED P2 LED
V.110
V.120
X.75
PPP (1 channel)
MLPPP (2 channels)
OFF ON
* 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.
References
The World Wide Web is an excellent source of information about terminal adapters, terminal adapter
installation, configuration, and troubleshooting. The following Web sites are good places to start:
•
Costmo’s Other Resources Page:
•
Data Communications FAQ:
•
Multi-Tech Systems, Inc.: