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Appendix D.Glossary
in-band
Signaling (dialing, diagnostics, management, configuration, etc.) over the same
channel used for data.
ingress
Frame relay frames leaving from an access device in a direction toward the
frame relay network.
interface device
Provides the interface between the end device(s) and a frame relay network by
encapsulating the user's native protocol in frame relay frames and sending the
frames across the frame relay backbone. See also encapsulation and frame-relay-
capable interface device.
ISDN
Integrated Services Digital Network. A network architecture that enables end-
to-end digital connections. The network supports diverse services through inte-
grated access arrangements and defines a limited set of standard, multipurpose
interfaces for equipment vendors, network providers, and customers. Inter-
working with a public switched telephone network is retained.
local area network (LAN)
A privately owned network that offers high-speed communications channels to
connect information processing equipment in a limited geographic area.
out-of-band
Signaling that is separated from the channel carrying information (voice, data,
video, etc.). Typically the separation is accomplished by a filter. The signaling
includes dialing and other supervisory signals.
packet
A message containing both control information and data. The control informa-
tion is used for routing the packet through a network to its final destination.
Contrast with frame relay frame.
packet-switching network
A telecommunications network based on packet-switching technology, wherein
a transmission channel is occupied only for the duration of the transmission of
the packet. Contrast with frame relay network.
D-6
Express 5200 User Manual
61202175L1-1
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