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 offers 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)
Write 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. To send signals from a device.
TXC
Transmit Clock. V.24 circuit 114.
TXD
Transmit 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).
WAN
Wide Area Network. A network that spans a large geographic area (e.g., a country).