Appendix D - Glossary
150-359-100-01, Revision 01
60
October 27, 2000
HXU-359 List 1
VT
Virtual Tributary — A signal designed for transport and
switching of sub-STS-1 payloads.
VTG
VT Group — A 9 row by 12 column structure (108 bytes) that
carries one or more VTs of the same size. An STS-1 payload
can accommodate seven VT groups.
VTP
VT Path — See Path.
VT Slot
There are four VT slots in each of the seven VT groups. Future
product enhancements will allow the VT slots to be configured
to carry either 1.544 Mb/s (VT1.5) or 2.048 Mb/s (VT2) traffic.
Wideband
Services requiring 1.5 to 50 Mb/s transport capacity.
XMT
Transmit
Yellow Signal
A Remote Alarm Indication (REI) and VT Path Remote Failure
Indication.
