Memotec CX900e, Hardware Reference Manual, Page: 168 / 200

CX900e Hardware Reference Manual
20-16
3006M100-002
Procedure 7: Installing -48V/Ring Generator Module and DEM
This procedure assumes that you will be installing the DEM as well as the -48V/
Ring Generator Module. If you are installing only the -48V/Ring Generator
Module, disregard this procedure and complete Procedure 8.
This procedure assumes that you have removed the cover from the chassis
(Procedure 2).
To install the -48V/Ring Generator Module and DEM:
1. Ground yourself to protect the I/O cards from electrostatic discharge (ESD).
2. Remove -48V/Ring Generator Module from its packaging.
3. Remove the DEM from its packaging.
You should safeguard the enclosed ribbon cable and screws for possible
installation of an optional seventh V.24 port (see Procedure 6). If you plan to
install this port, confirm the DEM’s DTE/DCE configuration and, if
necessary, unseat its jumpers, rotate them 180°, then reseat them (as
suggested in “Figure 4-2 DEM DTE/DCE Configuration Jumpers” ).
4. Remove the V.24 port knock-out on the chassis’ rear panel if you are
installing the DEM’s port option.
5. Screw the DEM onto the binding posts of the -48V/Ring Generator Module
with two Phillips-head screws
Figure 20-12 Connection between DEM and -48V/Ring Generator