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54 Chapter 1 Introducing the Business Communications Manager
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Telephony components
The telephony components perform call processing by connecting the telephones or peripheral
telephony equipment, such as fax machines, to the Public Switched Telephone Network (PSTN)
lines. They also process telephony information that has been received through an IP link.
• MSC — The Media Services Card (MSC) is a PCI card which performs call processing and
media processing of the voice channels. The BCM100 MSC contains two PEC IIIs that
provide voice channel processing for the MSC. You can upgrade your system with two
additional PEC IIIs. Refer to “Media Services Card” on page 56.
• CTM (North American systems only) — The Calling line identification (CLID) Trunk media
bay module (CTM) connects to four analog CLID PSTN lines.
• CTM 8 (North American systems only) — This CLID Trunk media bay module (CTM)
connects to eight analog CLID PSTN lines.
• 4X16 (North American systems only) — This module combines a four-line CLID Trunk
media bay module (CTM) with a 16-line Digital Station media bay module.
• DTM — The Digital Trunk media bay module (DTM) connects to standard digital PSTN T1,
E1 or PRI lines.
• BRI — The Basic Rate Interface media bay module (BRI) connects to four BRI S/T ISDN
lines. (NT1 required. S interface for European profiles; T interface for North American-based
profiles)
• ASM 8 (North American systems only) — The Analog Station media bay module (ASM 8)
connects to eight analog telephones or other analog equipment such as fax machines.
• DSM 16 — The 16-port Digital Station media bay module (DSM 16) connects to a maximum
of 16 digital telephones.
• DSM 32 — The 32-port Digital Station media bay module (DSM 32) connects to a maximum
of 32 digital telephones.
• DECT — This module allows radio-based cordless handsets to access systems that are
configured to accept the Digital Enhanced Cordless Telecommunications (DECT) profile. The
module connects to radio base stations, which receive and transmit signals to the handsets.
Refer to “Mobility services by region” on page 279 to determine the profiles that can use the
DECT protocol. DECT base station installation information is provided in a separate
document, the DECT Installation and Operations Guide.
• 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.
Note: You can upgrade the PEC Is on your 2.0 BCM1000 to PEC IIIs.
You cannot mix PEC Is with PEC IIIs. You must be running Business Communications
Manager 2.5 software or greater to allow this.