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Glossary GL-13
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Maintenance
Port (MAINT)
The RS-232C (H00) connector on the rear of the cabinet that connects the LMT (over
cables) or the RMT (over a modem) to AUDIX.
Maintenance
Shutdown
The process of closing all filesystems, leaving them unmounted and inaccessible
(normally used before a system power down). This may be done with the MI toggle
switch or shutdown form.
Major Alarm An alarm detected by AUDIX software that affects at least one fourth of the AUDIX
ports in service. Often a major alarm indicates that no AUDIX service is available.
Manager A software module responsible for the operation of one part or function of the system.
Memory A device which can store logic states such that data can be accessed and retrieved.
Memory may be temporary (such as system RAM) or permanent (such as disk).
Message
Categories
Groups of messages in subscribers’ mailboxes. Categories include new, unopened,
and old for the incoming mailbox, and delivered, accessed, undelivered, not
deliverable, and file cabinet for the outgoing mailbox.
Message Center An AP call-answering feature that allows an agent to enter a message for a busy or
unanswered extension. Also called Message Center Service (MCS).
Message Line The third line from the bottom of a terminal screen where help information and error
messages are displayed.
Message-
Waiting Lamp
An LED on a voice terminal (telephone) that alerts subscribers to new messages.
Also called Automatic Message-Waiting (AMW) Lamp.
MI Toggle
Switch
A switch on the MI (TN511) circuit pack used to shut down system software by
moving it off-center (left or right), or reinitialize a system when returned to center
position.
Microcom
Networking
Protocol
This provides on-line compressing data for increased throughput, provides error
detection, correction, and retransmission, and provides data rate matching with the
opposite endpoint.
Minor Alarm An alarm detected by maintenance software that affects less than one fourth of the
AUDIX ports in service, but has exceeded error thresholds or may impact service.
Mirroring See File Redundancy.
Mode An operating state in which the system can perform certain tasks. AUDIX modes
include control mode, normal mode, administrative or maintenance shutdown mode,
and initialization.
Modem A modulator/demodulator device for transmitting analog (continuous) signals.
Modem Pool A group of modems set up to accept incoming data calls from a remote device. The
switch’s modem-pooling feature inserts modems into the link automatically. The
transmission rate could range from 1200 to 9600 bps depending on facilities.
Modular
Processor Data
Module
(MPDM)
A data device that converts RS-232C or RS-449 protocol signals to Digital
Communications Protocol (DCP) used by the System 75/85 switch. MPDMs may
connect AUDIX to a switch DCIU or SCI link, or connect terminals to a switch port
board.