Chapter 1 Introducing the Business Communications Manager 21
Installation and Maintenance Guide
• DSM 32 — The 32-port Digital Station media bay module (DSM 32) connects to a maximum
of 32 digital telephones.
• DSM 32+ — This Digital Station media bay module provides the same functionality as the
DSM 32. This module can be set to single or double density. Double density settings allow the
module to support 32 telephones on one DS30 bus.
• FEM — The Fiber Expansion Media Bay Module (FEM) provides an easy upgrade from a
Norstar system to a Business Communications Manager system by connecting a maximum of
six Norstar expansion modules to a FEM installed in the BCM1000.
•The DDI MUX:
— provides the functionality of a DTM media bay module (T1 digital lines only)
— splits the incoming T1 line so that some of the lines are used for voice traffic and some
of the lines are used for data traffic
— provides either the (Channel Service Unit) CSU or (Data Service Unit) DSU
functionality to support connections to data terminal equipment (DTE), such as a
router or a bridge
— connects to network devices that supportV.35 interfaces
— provides end-to-end transparent bit service
— supports loopbacks between the Enterprise Edge and the internal Business
Communications Manager components, and between the Enterprise Edge and digital
terminal equipment
• BCM1000e — a separate cabinet with six additional bays for media bay modules. It connects
to the BCM1000 through an DS256 RJ45 connector. A Business Communications Manager
five-meter DS256 cable is included with the BCM1000e (expansion cabinet).
• Telephones and adapters — Business telephones and adapters connect to the media bay
modules installed in the BCM1000. Business Communications Manager supports Nortel
digital phones, as well as IP-based Nortel Networks telephones.
The Nortel Networks 20XX IP telephones have separate installation and operations
documentation. Refer to the main index on your system CD.
The system also supports both radio-based and IP-based wireless handsets, as well as a
cordless Digital phone (7406). The legacy Companion and DECT handsets and the Digital
Mobility phones use base stations to communicate with the system. The Wireless LAN IP
telephone communicates through an IP linked access point. Installation and configuration
information for these systems is provided in separate documentation for each system. Refer to
“Telephones and adapters” on page 50 for information about the handsets and the hardware
they use to connect to the system.