VeEX MPA User Manual page 838

MPA_e_manual_D07-00-129P_RevA00
T
Tandem Connection-Unequipped. Indicates that a 00h pattern has been detected in the
N1 byte of a Tandem Connection. This is an alarm.
TDM
Time Division Multiplexing. Digital multiplexing in which two or more apparently
simultaneous channels are derived from a given frequency spectrum (bit stream), by
interleaving pulses representing bits from different channels.
Test Set
A "Test Set" (sometimes referred to as "Test Unit") is a series of adjacent Circuit Packs
and/or Protocol Processors, installed in one chassis, which can perform an Add/Drop
Mapping configuration. The Test Set is based on a Circuit Pack's internal addressing
and provides Add/Drop Mapping functionality between higher speed and lower speed
Protocol Processors.
Test Unit
See Test Set
tHEC
Type Header Error Checksum.
TIM
Trace Identifier Mismatch alarm. Enabled from the Receive/SET page. Records the
number of seconds that the J0, J1, J2, or TC traces do not match the expected values.
Touch Screen
The interactive interface screen on the unit that is touch sensitive, and that the user
touches to make selections of menu items, thereby controlling the functions of the
tester.
TPID
Tag Protocol Identifier. A 16-bit field set to a value of 0x8100 in order to identify the
frame as a VLAN tagged (IEEE 802.1Q-tagged) frame. This field is located at the same
position as the EtherType field in untagged frames, and is thus used to distinguish the
frame from untagged frames.
TTI
Trail Trace Identifier
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