Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 143)

Acronyms and Definitions
Verilink Access System 2000: Basics Glossary-23
G
G.703 International Telegraph and
Telephone Consultative Committee
recommendation that specifies the
physical and electrical
characteristics of the hierarchical
interfaces; this specification covers
unstructured network lines (no
framing or signaling).
G.704 International Telegraph and
Telephone Consultative Committee
recommendation that specifies
physical standards for network
signals, including pulse, size,
amplitude, and frequency defined
in G.703. Specifies the E1 division
of the bit stream into 8000 256-bit
frames, each frame consisting of
32 “timeslots” of eight bits. This
division provides 30 timeslots to
transmit at 64 kbit/s with two 64
kbit/s timeslots controlling and
administrating the entire data
stream.
G.732 International Telegraph and
Telephone Consultative Committee
recommendation that covers the
specifications for handling stated
E1 fault conditions using service
and maintenance alarms. The fault
conditions include loss-of-frame
alignment, fault of CODEC, loss of
timeslot 16, loss of incoming 2
Mbit/s stream, error rate on
incoming stream, and alarm
indication in incoming stream.