User Guide ISDN Terminal Adapter MTA128ST-USB

Chapter 2 - Hardware Installation

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.

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:

http://modems.rosenet.net/or/

• Data Communications FAQ:

http://www.best.com/~malch/comfaq.html

• Multi-Tech Systems, Inc.:

http://www.multitech.com/