Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 165)

Acronyms and Definitions
Verilink Access System 2000: Basics Glossary-45
stop-bit In asynchronous transmission, the
last transmitted element in each
character, which informs the
receiver to become idle before
accepting another character.
Superframe (SF/D4) A sequence of twelve, 193-bit
frames used in D4. Bit number 193
provides error checking.
Switched Virtual Circuit (SVC) A connection established as-
needed in a frame relay network
which lasts only the duration of the
data transfer.
synchronous An uninterrupted block of data.
Each block is preceded by one or
more sync characters to
synchronize the receiver with the
datastream.
System Administrator (rights) The System Administrator is a
class of Node Manager user. The
System Administrator can set
configuration and monitoring,
rights and assign user accounts. A
sole System Administrator cannot
change his/her own rights.