24 Chapter 2 Overview of BCM50 Administration
NN40020-600NN40020-600
—CTM4/CTM8
—DTM
— GATM 4/GAT M 8
— 4x16
—ASM8
— ASM8+, GASM
—DSM16+/DSM32+
— DDIM

Main units

The main hardware component in the BCM50 system is the main unit. The six BCM50 models are
divided into two series: standard and BRI. The BRI (or b) series main units include BRI ports that
replace the four analog lines on the standard series. The two series are as follows:
• Standard series
• BCM50 main unit (with Telephony only)
The BCM50 main unit provides call processing and simple data networking functions. It
provides connections for 12 digital phones, 4 PSTN lines, 4 analog station ports, and 4
connections for auxiliary equipment (auxiliary ringer, page relay, page output, and music
source). The BCM50 main unit does not have a router, but it does have 4 LAN ports: one
is the OAM port for technicians, and the other three are for basic LAN connectivity.
• BCM50a main unit (with ADSL router)
The BCM50a main unit provides all of the same core functionality as the BCM50 main
unit, and it also has an integrated ADSL router for advanced data applications.
• BCM50e main unit (with Ethernet router)
The BCM50e main unit provides all of the same core functionality as the BCM50 main
unit, and it also has an integrated Ethernet router for advanced data applications.
• BRI series (b series)—available only in EMEA and APAC regions
• BCM50b main unit
The BCM50b main unit provides similar functionality to the BCM50 main unit. The
difference is that the BCM50b main unit has two integrated BRI ports that replace the four
analog lines on the RJ-21 telephony connector.
• BCM50ba main unit (with ADSL router)
The BCM50ba main unit provides similar functionality to the BCM50a main unit. The
difference is that the BCM50ba main unit has two integrated BRI ports that replace the
four analog lines on the RJ-21 telephony connector.
• BCM50be main unit (with Ethernet router)
The BCM50be main unit provides similar functionality to the BCM50e main unit. The
difference is that the BCM50be main unit has two integrated BRI ports that replace the
four analog lines on the RJ-21 telephony connector.