ACCULINK 3350 E1 NTU
Glossary-8
June 1996
3350-A2-GB20-10
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.
tributary unit
A unit that is under the control of another unit.
TStat branch
Test Status branch of the E1 NTU menu tree.
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.
WAN
Wide Area Network. A network that spans a large geographic area (e.g., a country).
warmStart trap
An SNMP trap that indicates that the device has reinitialized itself.
1in8 Test
A test pattern consisting of a one (1) followed by seven zeros (on the network
only).
2B1Q
Two binary, one quaternary. A line coding technique that compresses two binary
bits of data into one time state as a four-level code.
32767 Test
A pseudo-random bit sequence (PRBS) that is 32,767 bits long (on the network
only). This is a PRBS 2
15
–1 test.
