Chapter 2 - Installation

2.4.1Out of Service/Test Jumper

When the MT2834 is Out Of Service (OOS), it is busy to incoming calls. In the Test (default) setting, the modem drives pin 25 high when the modem is in Test mode. In the OOS (optional) setting, the computer or terminal forces pin 25 high and puts the modem in a busy condition. Note that jumper (shorting) plugs are not shipped with the MT2834, but is provided by Multi-Tech’s Tech Support group on request.

Test Setting

OOS Setting

(Factory Default)

(Optional)

2.4.2MI/MIC Option Jumper

To activate MI/MIC option (Mode Indicate/Mode Indicate Common Interface), you must first move MI/MIC jumper plugs. The $MI command, then controls this function (AT$MI1 enables MI/MIC and AT$MI0 disables MI/MIC). This option is for applications where the modem's dialing capability is not used, and dialing is done by an external device (such as a 801 dialer, a computer, or a PBX/CBX system dialer).

MI/MICMI/MIC

MI/MIC Disabled

MI/MIC Enabled

(Factory Default)

(Optional)

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Multi-Tech Systems MT2834BR, MT2834BLR manual Out of Service/Test Jumper, 2 MI/MIC Option Jumper