
Appendix C. Acronyms/Abbreviations
OOF | out of frame |
OOS | out of service |
PCV | |
PES | |
POP | point of presence |
PPP....................
PSES | |
PSTN | public switched telephone network |
PVC | permanent virtual circuit |
RD | receive data |
RDL | remote digital loopback |
RL | remote loopback |
RMA | return material authorization |
RS | request to send |
RTS | request to send |
Rx | receive |
SEFS | severely errored framing seconds |
SES | severely errored seconds |
SLIP | serial line internet protocol |
SNMP | simple network management protocol |
SR | data set ready |
SW56 | switched 56 |
sync | synchronous |
TA | terminal equipment available |
TD | transmit data |
TDM | time division multiplexing |
TM | test mode |
TR | data terminal ready |
Tx | transmit |
UAS | unavailable seconds |
WAN | wide area network |
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