Netopia Router PN Series - Manual (Page 279)

GL-9
Frame-Relay-Capable Interface Device: A communications device
that per forms encapsulation. frame-Relay-capable reouters and
bridges are examples of inter face devices used to inter face the
customer’s equipment to a frame relay network. See also
Inteface
Device and Encapsulation.
Frame Relay Frame: A variable-length unit of data, in frame-relay
format that is transmitted through a frame relay network as pure
data. Contrast with Packet. See also
Q.922A.
Frame Relay Network: A telecommunications network based on
frame relay technology. Data is multiplexed. In contrast with a
Packet-Switching Network.
gateway: A device that connects two or more networks that use
different protocols. Gateways provide address translation services,
but do not translate data. Gateways must be used in conjunction
with special software packages that allow computers to use
networking protocols not originally designed for them.
hard seeding: A router setting. In hard seeding, if a router that has
just been reset detects a network number or zone name conflict
between its configured information and the information provided by
another router, it disables the router port for which there is a
conflict. See
also non-seeding, seeding, seed router, and soft
seeding.
HDLC (High Level Data Link Control): A generic link-level
communications protocol developed by the International
Organization for Standardization (ISO). HDLC manages
synchronous, code-transparent, serial information transfer over a
link connection. See also
SDLC (Synchronous Data Link Control).
header: In packets, a header is part of the envelope information
that surrounds the actual data being transmitted. In e-mail, a
header is usually the address and routing information found at the
top of messages.
hop: A single trunk line between two switches in a frame relay
network. An established PVC consists of a certain number of hops,
spanning the distance from the ingress access inter face to the
egress access inter face within the network.