Nortel BCM 3.7, Manual

Page: 141 / 1004

Explaining the Media Bay Modules headings 141
Programming Operations Guide
GATM (Global Analog Trunk module)
These trunk modules can be adjusted to have static trunk parameters (pre-BCM 3.5 software), or to
allow the system to download new parameters when they become available (BCM 3.5 and newer
software). If the trunk is set to the latter state, trunk parameters are downloaded every time the
module boots up, or when the parameters change while the module is working. You can also set
line and telephone impedance to either 600ohm or 900ohm for modules with downloadable
parameters. The impedance settings are located under
Lines and Telephone Services ,
respectively. Refer to the installation guides for details about the module.
Trunk module
(continued) • 4X16 Media Bay Module
(4X16) (counts as one
CTM) • 4X16=1 per offset (4 lines)
and additional bus (station) • 4X16s can be set to module
types: Loop
• BRI Media Bay Module
(BRI) • BRI=3 per bus, 4 loops (8
lines) per module • BRI can be set to module
types BRI S/T, BRI U2, BRI
U4 (setting must match
physical module type). U2
and U4 are region-specific
Data/trunk
module* • Digital Drop and Insert
(DDI) Mux module • Universal T1=1 per two
buses, supports 24 lines
* Also refer to the section that
describes the UTWAN, which
provides the data connections
through a WAN card.
• T1
Specialized
modules • Norstar trunk expansion
modules, with Analog
Trunk cards, connected to
a FEM • FEM=1 per bus, can support
up to three analog trunk
cards (in one trunk
expansion unit)/4 lines each Norstar analog trunk cards:
Loop, E&M, DID
• DDI MUX • 1 per bus • T1 (telephony and data).
Refer to
“Configuring the DDI
Mux module” on page 161 .
• Norstar trunk expansion
modules with BRI cards,
connected to a FEM • FEM=1 per bus, can support
up to three BRI cards (in one
trunk expansion unit)/4 loops
each • Norstar BRI cards: BRI S/T,
BRI U2, BRI U4 (setting must
match physical module type).
U2 and U4 are
region-specific
Data module Refer to the data section of this book ( “Configuring a data module” on page 190 ) for
details about setting up a data module on DS30 08. This process includes any Norstar
Data Modules connected to a FEM.
Legacy
equipment • DECT Media Bay Module
(DECT) • DECT=1 per bus, 4 loops,
supports 36 handsets DECT (region-specific)
Table 11 Programmed Bus Types (Continued)
Programmed
Bus Type
Hardware unit Capacity
Available line types (some
line types are
region-dependent)