AB-4 ABBREVIATIONS
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MPDM modular processor data module
MS/T main satellite/tributary network
MTDM modular trunk data module
Mbps million bits per second
NCP network control point (for SDN)
NID network inward dialing
OSI Open Systems Interconnection
PAM pulse-amplitude modulation
PBX private branch exchange
PC personal computer
protocol converter
PCM pulse-code modulation
PNA Private Network Access (package)
PNI port network interface (for SDN)
POP point of presence
PRI primary rate interface
PROC procedure
PSC permanent switched connection
RLT release link trunk
RNX location code
S75/S85 System 75/System 85
SAT system access terminal
SCI/PI switch communications interface/processor interface
SCS system clock synchronizer
SDDN Software-Defined Digital Network