M

MAPI

See Microsoft Messaging API (MAPI).

Mbps

See megabits per second (Mbps).

media stream

The type of information exchanged over a call.

media type

The form in which data is transmitted on a line.

megabits per second (Mbps)

1,544,000 bits per second (bps). See also bits per second (bps).

megahertz (MHz)

One million cycles per second; a unit of frequency used to measure band and bandwidth. See also band, bandwidth.

MHz

See megahertz (MHz).

Microsoft Messaging API (MAPI)

Set of API functions and an OLE interface that lets messaging clients, such as Microsoft Exchange, interact with various message service providers and various computer telephony servers running Windows NT Server/Windows 2000 Server.

Multicast

See IP Multicast.

multi-link PPP

A communications protocol that allows the combination of two or more B channels into a single, faster PPP connection. With multi-link PPP, you can have a 128-Kbps PPP connection over a Basic Rate ISDN line. See also Basic Rate Interface (BRI-ISDN), point-to-point protocol (PPP).