Chapter 10 Wiring the modules 141
Installation and Maintenance Guide
FEM wiring
A Fiber Expansion module (FEM) allows you to upgrade from a Norstar system to a Business
Communications Manager system by reusing the Norstar expansion modules. The expansion
modules connect to the FEM module installed on a BCM1000, using the same fiber cable that
connected them to the Norstar main housing.
Connecting the fiber cables
Follow these steps to connect your Norstar expansion modules to a FEM module installed into a
BCM1000.
1 Ensure the BCM1000 is properly powered and rebooted.
2 Connect the fiber cables from the Norstar expansion modules to the jacks on the FEM module.
a Connect the Norstar Line Modules to the FEM beginning at fiber port 1.
b Connect Norstar Extension Modules to the FEM beginning at fiber port 6.
3 Change the DN records in the Unified Manager or change the set wiring, as required, to match
your system.
Warning: Handling optical fiber cables:
If the cable is too long, ensure that it is coiled correctly.
Coil excess fiber carefully around the spool provided. Do not bend the cable around any
tight corners. Bends in the fiber cable must not be less than 100 mm in diameter. Place the
fiber cable spool into a slot at the back of the cable trough.
Note: If you enable all six jacks of the FEM module, the FEM module is the only module
you can install on the BCM1000, because each port requires one DS30 bus. Refer to “FEM
switch settings” on page 108.
Note: Which DIP switch settings you chose will determine which FEM ports are
available. Refer to “FEM switch settings” on page 108.
Warning: When you connect a Norstar station module to an FEM, the extension numbers
of the telephones connected to the station module change. To keep the same extension
numbers, change the DNs of the telephones or change the telephone wiring to correspond
with the required DNs.
Note: If you connect a Norstar station module amphenol cable directly to a DSM, you do
not have to change any settings to maintain the DN assignments.
