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ACCULINK 317x E1 DSU/CSU
Glossary-8 December 1996 3170-A2-GB20-20
self-test
A test that checks most hardware components when power is applied to the device
or a reset is initiated.
server A device that of
fers a specific service, such as database management, to a client.
SES Severely Errored Seconds. Seconds with 805 or more CRC errors or errored frame
alignment signals; or one or more LOS, AIS, or OOF events.
Set command (SNMP) W
rite access to SNMP MIB objects.
SLIP Serial Line Internet Protocol. A link layer protocol used by SNMP.
SNMP Simple Network Management Protocol. A generic network management system
that allows the device to be managed by any industry-standard SNMP manager.
Stat branch Status branch of the E1 DSU/CSU menu tree.
STest branch Self Test Health branch of the E1 DSU/CSU menu tree.
StEvnt
Status Event Register
. Records the occurrence of certain alarm conditions.
subnet
An IP addressing standard in which a portion of the host address can be used to
create multiple network addresses that are logically a subdivision of the network
address.
subnet mask An integer used with the IP address of the host to determine which bits in the host
address are used in the subnet address.
synchronous data
Data transmission that is synchronized by timing signals. Characters are sent at a
fixed rate.
TCP/IP Transmission Control Protocol/Internet Protocol. The dominant protocol in the
worldwide Internet.
time slot The allocated DS0 channel slot when DS0 channels are combined to form an
aggregate bit stream.
trap (SNMP)
A notification message to the SNMP manager when an unusual event occurs on a
network device, such as a reinitialization.
TStat branch Test Status branch of the E1 DSU/CSU menu tree.
TS16 Time-slot 16. The time slot which may be reserved for signaling.
TX Transmit. T
o send signals from a device.
TXC T
ransmit Clock. V
.24 circuit 114.
TXD T
ransmit Data. V
.24 circuit 103.
UAS
Unavailable Seconds. A count of 1-second intervals when service is unavailable.
UDP User Datagram Protocol. A TCP/IP protocol describing how messages reach
application programs within a destination computer.
UL Underwriter’s Laboratories, Inc. An organization which promotes product safety.
Vac Volts alternating current.
Vdc Volts direct current.
V.24 A CCITT standard for a low-speed, 25-position, DCE/DTE interface.
V.35 A CCITT standard for a high-speed, 34-position, DCE/DTE interface.
V.54 A CCITT standard for local and remote diagnostic loopback tests.
V
.54 Loop 2
A CCITT standard for a data channel loopback (DCLB).
V
.54 Loop 3
A CCITT standard for a data terminal loopback (DTLB).
WA N Wide Area Network. A network that spans a large geographic area (e.g., a country).