SPG
single point ground
SysB
system busy
TADO
touch asynchronous data option
TII
T1 IPE interface
TSG
telephone security group
TTT
transmission test trunk
TTU
transmission test unit
TXVM
transmit valid memory
UEM
universal equipment module
UnEq
unequipped
XBERT
bit error rate test
XIVD
peripheral integrated voice and data
XPM
XSM-based Peripheral Module
XSM
extended system monitor
Meridian SuperNode MSL-100 Intelligent Peripheral Equipment (IPE) Reference Manual MSL14
List of terms 12-9