Nortel Networks BCM1000 - Manual (Page 89)

89
Installation and Maintenance Guide
Chapter 2
Telephony hardware
The BCM1000 is a modular system. You can increase the capacity of your Business
Communications Manager by adding more telephony hardware components known as media bay
modules.
The BCM1000 accommodates three media bay modules. The BCM1000e accommodates an
additional six modules. The number of media bay modules that can be added to your system is
determined by the number of media bays that are open, combined with the number of DS30
channels each component occupies. Each Business Communications Manager system has a
maximum of six DS30 channels available to media bay modules.
If your system requires many IP lines or trunks, you can reduce the number of DS30 channels that
are assigned to modules and increase the number of channels available to IP telephones. This is
called a 3/5 DS30 channel split. In this case, you only have five DS30 channels available to media
bay modules. Refer to
“Understanding DS30 channel numbers” on page 114 for more information.
Refer to Chapter 4, “Selecting the media bay modules for your system,” on page 111 for details
about determining how many media bay modules can be installed in a system.
As well, this chapter describes the various types of telephone equipment that can be used with the
Business Communications Manager system.
Figure 24 provides pointers to the sections that
describe the modules and telephones that can be installed into the BCM1000.
Figure 24 Telephony hardware components.
Warning: Changing the DS30 channel split
If you change the channel split from 2/6 (default) to 3/5 after the system is initialized, any
module set to DS30 channel 7 or requiring the use of channel 7 becomes inoperable.
If you change the channel split from a 3/5 split to a 2/6 split after the system is initialized,
all data is lost and all optional applications must be reinstalled and reconfigured.
“Trunk media bay modules”
on page 93
“Station media bay modules”
on page 97
“Specialized media bay
modules” on page 100
“Telephones and adapters”
on page 103
Refer to “Media bay module availability by region” on
page 299 and “Trunk availability by region” on page
300 to determine which media bay modules and which
types of trunk lines are available in your location.