1
Model MMH956K/MMV1656K
56K Internal DSU Upgrade Kit
Product Update
PN S000339A
4/02/04
This Product Update covers installing an internal 56K DSU in the MultiMux MMH900 series or the MMV1600/
3200 series. The first procedure covers installing the DSU in an MMH900 series and the second procedure
covers installing the DSU in an MMV1600/3200 series.
MMH900 Series DSU Upgrade Procedure
Step
Procedure
1
Check the contents of your upgrade kit to ensure that it contains the parts listed below:
a) Screwdriver
b) Mounting screws (2)
c) MMH956K DSU
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)
MMH900 Cover
5
Plug in the Internal 56K DSU 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 DSU 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
56K Internal
DSU
2834
Shunt
Modem 96-pin
Connector
Base
