Nortel BCM 3.7 Manual page 914

914 M
Long Tones
This feature allows you to control the length of a tone so that you can signal devices such
as fax or answering machines. These devices require tones longer than the standard 120
milliseconds. (FEATURE 808)
M
MAC address
The Media Access Control is a physical address that is the portion of the data-link layer in
802.x networks.It controls addressing information of the packet and enables data to be sent
and received across a local area network. IP telephones, for instance, have a MAC address
that allows the Business Communications Manager to keep track of individual telephones
even if dynamic IP addresses are used.
mailbox
A storage place for voice messages on Business Communications Manager Voice
Messaging.
Maintenance button
This button, located on the front page of the Unified Manager, provides access to a
number of troubleshooting and diagnostic tools for your system. It also includes the tools
for controlling the legacy DECT modem. Documentation, or your service technician will
direct you when you need to use these tools.
MCDN
Although defined as a Meridian Customer-Defined Network, this network protocol
provides Meridian system attendant features (break-in and camp-on) to Business
Communications Manager systems that are network to the Meridian over PRI SL-1 lines,
providing the MCDN keycode has been entered at the Business Communication Manager.
There are setup requirements from both ends of this network link to properly enable the
features. The MCDN protocol also provides network trunking features such as Trunk
Anti-Tromboning (TAT) and Trunk Route Optimization (TRO). Business
Communications Managers can also be networked without a Meridian system, but in this
case, the Meridian attendant features are not supported. VoIP trunks can also provide
MCDN networking features if the MCDN keycode is applied to the system.
Media Access Control
See MAC address.
media channel
Media channels are the communication channels used to send voice and data information
between the devices and feature ports. Media channels are also known as B channels. The
Business Communications Manager uses the MSC to manage these channels on the
system.
N0008589 3.3