Cisco BPX 8650, Installation And Configuration Manual

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Glossary
GL-15
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
node
An IGX or BPX switch serving as a connection point to the network. At a node, connections from
service lines are routed to trunks for transmission to other nodes in the network.
normal response
mode
See NRM.
NPM
network processor module.
Micro-processor based system controller front card that contains the software used to operate the IGX
switch.
NRM
normal response mode.
Maximum number of cells a source may send for each forward RM cell, that is, an RM cell must be
sent for every Nrm-1 data cells.
NTM
network trunk module.
IGX front card that coordinates fastpacket trunk traffic to another node via a number of back cards:
T1, E1, Y1, and subrate (RS449, X.21, and V.35).
O
OC-3
Standard optical transmission facility rate of 155.20 Mbps.
OCC
other common carrier.
In the United States, reference to all the other telecommunications companies providing various
transmission services other than AT&T.
other common
carrier
See OCC.
P
packet assembler/
disassembler
See PAD.
packet line
Packet line referred to a line used to carry FastPackets between nodes in a network. The term in these
documents is replaced by the more general “trunk” which is defined as a physical link from node to
node, node to shelf, or node to network. The trunk may be one that supports 24-byte FastPackets
(packet trunk), or one that supports 53 byte ATM cells (cell trunk).
packet switching
A system that breaks data strings into small units (packets), then individually addresses and routes
them through the network.
PAD
packet assembeler/diassembler.
A device that converts a serial data stream into discrete packets in the transmit direction and converts
the received packets back into a serial data stream. Adds header information in the transmit packet to
allow it to be routed to the proper destination.
partially-interleaved
EIA
One control lead in each direction, generally RTS-CTS, is transmitted in same byte as seven data bits.
For fast control lead response to data being turned on and off.