AT&T MERLIN LEGEND Data Manual page 147

Glossary
S
signaling
The sending of control and status information between devices to set up, maintain, or take down a connection.
simplex signaling
The transmission of signals in one direction only across a telecommunications channel.
single-line telephone
An industry-standard, touch-tone or rotary telephone that only handles one line/trunk and is connected to the
communications system via a jack on a basic telephone module.
SMDR printer
A printer used for Station Message Detail Recording (SMDR) that is connected to the communications system via an RS-232
jack on the processor module.
Software Defined Network (SDN)
An AT&T private networking service created by specialized software within the public network.
special charactcr
A pause, stop, or end-of-dialing signal in a programmed dialing sequence such as an Auto Dial or personal Speed Dial
number.
Square Key
A way of configuring the communication system in Key mode so that all lines appear on all telephones.
station
The endpoint on the station side of the communications system. A station can be a telephone with or without an adjunct or
can be a data terminal with a modem (analog) or an ISDN 7500B Data Module (digital) attached.
station jack
An analog, digital, or tip/ring (T/R) interface on the control unit module for connecting telephones and other equipment.
Supplemental Alert Adapter (SAA)
A device that permits alerting equipment to be connected to an analog multiline telephone jack so that people working in
noisy or remote areas of a building can be alerted to incoming calls.
switched service network (SSN)
A network consisting of terminals, transmission lines, and at least one exchange on which a user can communicate with any
other user at any time.
switchhook flash
Operation of the telephone switchhook in which the on-hook period is in the range of 250-500 ms.
synchronous
A method for transmitting a continuous digital data stream in which the transmission of each binary bit is synchronized with a
master clock.
system acceptance test
A test of all trunks, telephones, data terminals, and features after installation to ensure they are working correctly.
system date
The date that appears on display telephones and Station
System Programming & Maintenance (SPM)
A DOS-or UNIX-based application for programming and
Message Detail Recording (SMDR) reports.
maintaining the communications system.
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