Avaya Communication Manager Administrator's Manual page 1825

switch-node interface (SNI)
The basic building block of a switch node. An SNI circuit pack controls the routing of circuit, packet,
and control messages.
switch-node link (SNL)
The hardware that provides a bridge between two or more switch nodes. The SNL consists of the two
SNI circuit packs residing on the switch nodes and the hardware connecting the SNIs. This hardware
can include lightwave transceivers that convert the SNI's electrical signals to light signals, the copper
wire that connects the SNIs to the lightwave transceivers, a full-duplex fiber-optic cable, DS1
converter circuit cards and DS1 facilities if a company does not have rights to lay cable, and
appropriate connectors.
switch-processing element (SPE)
A complex of circuit packs (processor, memory, disk controller, and bus-interface cards) mounted in
a PPN control carrier. The SPE serves as the control element for that PPN and, optionally, for one or
more EPNs.
SXS
Step-by-step
synchronous data transmission
A method of sending data in which discrete signal elements are sent at a fixed and continuous rate and
specified times. See also association.
SYSAM
System Access and Administration
system administrator
The person who maintains overall customer responsibility for system administration. Generally, all
administration functions are performed from the Management Terminal. The switch requires a special
login, referred to as the system administrator login, to gain access to system-administration
capabilities.
system printer
An optional printer that may be used to print scheduled reports via the report scheduler.
system report
A report that provides historical traffic information for internally measured splits.
system-status report
A report that provides real-time status information for internally measured splits.
system manager
A person responsible for specifying and administering features and services for a system.
system reload
A process that allows stored data to be written from a tape into the system memory (normally after a
power outage).
T
T1
A digital transmission standard that in North America carries traffic at the DS1 rate of 1.544 Mbps. A
T1 facility is divided into 24 channels (DS0s) of 64 kbps. These 24 channels, with an overall digital
rate of 1.536 Mbps, and an 8-kbps framing and synchronization channel make up the 1.544-Mbps
transmission. When a D-channel is present, it occupies channel 24. T1 facilities are also used in Japan
and some Middle-Eastern countries.
Administrator's Guide for Avaya Communication Manager
November 2003
Glossary and Abbreviations
1825
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