D-4 61200290L1-1G
Appendix D, Acronyms/Abbreviations MX2800 M13 Multiplexer User Manual
PSTN............................ public switched telephone network
PVC.............................. permanent virtual circuit
R
RD.................................receive data
RDL..............................remote digital loopback
RL.................................remote loopback
RMA.............................return material authorization
RS................................. request to send
RTS...............................request to send
Rx................................. receive
S
SA................................. service affecting
SEFS.............................severely errored framing seconds
SES............................... severely errored seconds
SLIP............................. serial line internet protocol
SNMP...........................simple network management protocol
SONET.........................synchronous optical network
SR................................. data set ready
SW56............................ switched 56
sync...............................synchronous
T
TA.................................terminal equipment available
TD.................................transmit data
TDM.............................time division multiplexing
TM................................test mode
TR.................................data terminal ready
Tx..................................transmit
U
UAS.............................. unavailable seconds
W
WAN.............................wide area network