Glossary
H
Centillion 1200N ATM Switch User Manual
B-31
NTP 297-8103-903
GFC
Generic Flow Control: GFC is a field in the ATM header which can be used to
provide local functions (e.g., flow control). It has local significance only and the
value encoded in the field is not carried end-to-end.
GWPAD
GateWay Packet Assembler and Disassembler : A functional unit that interconnects
two computer networks with different network architectures and enables data
terminal equipment (DTE) not equipped for packet switching to access a packet
switched network.
1
H
H-Channel
H-Channels are ISDN bearer services that have pre-defined speeds, starting and
stopping locations on a PRI and are contiguously transported from one PRI site
through networks to another PRI site.
H0 Channel
A 384 kbps channel that consists of six contiguous DS0s (64 kbps) of a T1 line.
H10 Channel
The North American 1472 kbps channel from a T1 or primary rate carrier. This is
equivalent to twenty-three (23) 64 kbps channels.
H11 Channel
The North American primary rate used as a single 1536 kbps channel. This channel
uses 24 contiguous DS0s or the entire T1 line except for the 8 kbps framing pattern.
H12
The European primary rate used as a single 1920 kbps channel (30 64 kbps channels
or the entire E1 line except for the 64 kbps framing and maintenance channel.
Host Apparent Address
A set of internetwork layer addresses which a host will directly resolve to lower
layer addresses.
1.IBM Dictionary of Computing
