Glossary 263
Installation and Maintenance Guide
Local Area Network (LAN)
A network of interconnected computers, such as the Business Communications Manager,
sharing the resources of a single processor or server within a relatively small geographic
area.
mailbox
A storage place for voice messages on Business Communications Manager Voice
Messaging.
Meridian 1 ISDN Primary Rate Interface
This is the MCDN protocol which is used between members of the Nortel Networks
Meridian family of Private Telecommunication Network Exchanges. The signalling
information is carried via time slot 16 of a 2.048 Mbit/s digital transmission system.
MHz
A unit of measure indicating frequency in millions of cycles per second.
microprocessor
The Central Processing Unit (CPU) component that controls all activity inside the
Business Communications Manager.
mirrored disks
In terms of the Business Communications Manager, this refers to the BCM1000
configuration that consists of two hard disks and a RAID board. The RAID board ensures
that both disks contain exact copies of each other. If one disk fails, the other disk assumes
control. Thus, you can time the replacement of the disabled disk to suit your maintenance
schedule. This system does not replace the need for current BRU copies.
modem
A communications device that allows computers to exchange data over telephone lines.
music source
You can connect a radio or other source of music to the system to provide music for the
Music on Hold and Background Music features. A music source is not part of the Business
Communications Manager system components.
Network Basic Input/Output System (NetBIOS)
An interface and upper-level protocol developed by IBM for use with a proprietary
adapter for its PC network product. NetBIOS provides a standard interface to the lower
networking layers. The protocol provides higher-level programs with access to the
network.
network
Two or more computers linked electronically to share programs and exchange data.