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Glossary:
364
Installation and Upgrades for G700 with S8300 or S8700
555-234-100 — Issue 3 — May 2003
SCI
Switch communications interface
SCO
System control office
SCOTCH
Switch conferencing for TDM bus in concentration highway
SCSI
See
small computer system interface (SCSI).
SDDN
Software-defined data network
SDH
See Synchronous Digital Hierarchy (SDH)
.
SDI
Switched digital international
SDLC
See
Synchronous Data-Link Control (SDLC).
SDN
Software-defined network
service level agreement (SLA)
A contract between a service provider and a user that defines the nature of the service that is provided, and that
establishes a set of measurements to measure the level of service that is provided against the level of service that was
agreed to.
service profile identifier (SPID)
A number that is assigned to every terminal device that is connected to an ISDN line for circuit-switched network access.
The SPID is programmed into the customer equipment to provide the appropriate services and features for each device
that communicates over the ISDN line and the B-channel. A SPID is based on the customer area code, although the
service provider determines the specific format.
Session Initiated Protocol (SIP)
One of the leading Voice Over IP (VoIP) signaling protocols. See also
H.323; Voice over IP (VoIP).
SFRL
Single-frequency return loss
SID
Station-identification number
Simple Management Network Protocol (SNMP)
The industry-standard protocol that governs network management and the monitoring of network devices and their
functions. The use of SNMP is not necessarily limited to TCP/IP networks, but can be implemented over Ethernet and
Open Systems Interconnect (OSI) transports. See also
Remote Monitoring (RMON).
simulated bridged appearance
A bridged appearance that the principal user of a telephone user can use to bridge onto a call that another party answered
on his or her behalf. A simulated bridge appearance is the same as a temporary bridged appearance.
single-line voice terminal
A telephone that is served by a single-line tip and ring circuit. Avaya single-line telephones include models 500, 2500,
7101A, and 7103A. See also multiappearance telephone.