Multitech MMH2834 Technical manual

Model MMH2834
28.8 bps Internal modem Upgrade
Product Update
PNS000321A
12/11/03
ThisProduct Update coversinstalling an internal MMH2834modem in theMultiMux MMH904Ca.TheMMH2834
modem can not be installed in the MMH900C series.The MMH900C series has a 4-pin connector that supports
the DSU and older style modems.The MMH900Ca series has a 10-pin connector that supports both the DSU
andMMH2834mode.
Step Procedure
1 Check the contents of your upgrade kit to ensure that it contains the parts listed below:
a) MMH2834modem
b) RJ11telephone cable
c) Mounting screws (2)
d) Screwdriver
d) Serial tag label
2 Turn the MultiMux power switch to OFF and unplug the MultiMux power cord from the wall outlet.
3 Turn the MultiMux upsidedown and remove the four screws securing the cover to the base.
4 Slide the cover off the base.
Cover
Mounting
Screw
(x4)
Figure 1. MMH900 Cover
5 Plug in the Internal MMH2834 modem to the connector on the motherboard and the back 6-pins on the
side 10-pin connector. Be careful to align the 6-pins of the MMH2834 with the pins on the 10-pin
connector that are the farthest from the modem 96-pin connector.
1 2 3 4 5 6 7 8 1 2 3 4
V.35 V.24
OTH R RKWL14.4
V29/V33
2834
Modem Mounting
Screws
V.29/V.33
Shunt
Motherboard
Modem 10-pin
Connector
MMH2834
Modem
2834
Shunt
Modem 96-pin
Connector
Base
6 Secure the MMH2834 to the base using the two plastic mounting screws provided in the upgrade kit.One
of the screws goes into the connector and the other one into the standoff on the motherboard.
7 Ensure that the shunt is in the 2834 position
8 Set switch position 2 of the 8-position DIP-switch to the OPEN (UP) position.

9 Slide the cover onto the base and replace the four cover screws.
10 Attach the modem serial tag tothe bottom of the MultiMux cabinet next to the existing serial tag(s).
11 Connect the RJ11 cable provided in the upgrade kit to the COMPOSITE LINK INTERNAL MODEM DIAL-
UP or LEASED connector on the backpanel of the MultiMux.
12 Connect the other end of the RJ11 cable into a telephone wall connector and plug in the power cord.
10 Refer toChapter 5 ofyourMultiMuxOwner's Manualto configure your MMH2834modem.