Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 132)

Acronyms and Definitions
Glossary-12 Verilink Access System 2000: Basics
CV-P See code violation—path (CV-P) .
cyclic redundancy check (CRC) An error-checking algorithm
performed on data transmissions.
On a frame-by-frame basis, a
numerical value is derived from the
data in the bit stream and inserted
at the sending end of a
transmission. When each frame
reaches the receive end, the cyclic
redundancy check is calculated
again and compared with the value
received. Discrepancies usually
indicate one or more transmission
errors.
cyclic redundancy check multiframe An E1 error checking algorithm
using a group of 16 frames
numbered 0 (zero) to 15 indicating
the order of occurrence within the
CRC-4 multiframe. Bit pattern 1 of
timeslot 0 (zero) is used to carry
CRC-4 information and controls its
synchronization pattern (E1 only).