Model MMH2834
28.8 bps Internal modem Upgrade
Product Update
PN S000321A
12/11/03
This Product Update covers installing an internal MMH2834 modem in the MultiMux MMH904Ca. The MMH2834
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
and MMH2834 mode.
Step
Procedure
1
Check the contents of your upgrade kit to ensure that it contains the parts listed below:
a) MMH2834 modem
b) RJ11 telephone 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
OTHER 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.
