![Nortel BayStack 450 Switch Installation Manual Download Page 123](http://html.mh-extra.com/html/nortel/baystack-450-switch/baystack-450-switch_installation-manual_1706886123.webp)
Nortel Business Communications Manager 450 1.0
Installation — System
NN40160-301 01.04 Standard
July 2009
Copyright © 2006-2009 Nortel Networks
System information and tools
Use the following information to prepare for your BCM450 hardware
installation.
Navigation
•
•
Additional hardware (page 125)
•
•
Media bay modules
Trunk media bay modules connect telecommunications lines to the BCM450
system. For a list of the types of trunk media bay modules that are available
for the BCM450 system, see
Table 11 Trunk MBMs (page 123)
.
Table 11 Trunk MBMs
Module type
Function
Notes
DTM
(see Digital trunk media bay
module on page 41)
Connects digital public switched
telephone lines to the BCM450
1.0 system.
Can connect to T1 or PRI-E1/T1
interfaces.
BRIM
(see Basic rate interface media
bay module on page 42)
Connects a maximum of four
ISDN BRI S/T interfaces.
—
GATM4/GATM8
(see Global Analog Trunk
Module on page 42)
Connects either four (GATM4) or
eight (GATM8) analog public
switched telephone lines to the
BCM450 1.0 system.
—
Summary of Contents for BayStack 450 Switch
Page 141: ......