User's Manual

Glossary
227
SIU: Service Interface Unit
SPU: Signalling Processing Unit
ST: Subscriber Terminal
STP: Shelf Termination Panel
T
TCP: Transmission Control Protocol
TEI: Terminal Equipment Identifier
TU: Tributary Unit
TU8: Tributary Unit Eight E1 ports
TX: Transmit
U
UCP: Uplink Code Phase
V
VDU: Video Display Unit
VF: Voice Frequency
VLan: Virtual Local Area Network
X
XTU: Exchange Tributary Unit