3 speaker volume control, 2 wire/ 4 wire operation, 2 wire/4 wire operation – Multi-Tech Systems MT2834BL User Manual
Page 83: Speaker volume control

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Chapter 8 - Dip-Switch Settings
Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide
Switch #16 (MT2834BA Only)
(Reserved for Future Use)
Switch #16 (MT2834BL Only)
2 Wire/4 Wire Operation
(Asynchronous/Synchronous Mode)
The modem works over either 2-wire or 4-wire leased lines. To select 4-wire operation, place Switch
#16 DOWN (Default); and to select 2-wire operation, place Switch #16 UP.
2-Wire Leased Line
=
Switch #16 UP
4-Wire Leased Line
=
Switch #16 DOWN
Factory Default Setting
=
DOWN
8.3
Speaker Volume Control
You can adjust the volume of the modem’s phone-line monitor speaker with a volume control knob,
located on the back of the modem next to the RS-232C connector (see Figure 9-1 for location). Turn
the knob clockwise to increase the modem's volume and counterclockwise to decrease speaker
volume.