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List of terms
Nortel Multiservice Switch 7400/15000/20000
Terminology
NN10600-005 7.2S1 Standard
PCR7.2 and up March 2006
Copyright © 2006, Nortel Nortel Confidential
transit network
An OSPF network with more than one router.
transit node
A logical representation of a node, which is also known as a hop node. It is
composed of an address called node ID and an egress port called port ID.
translation mode
One of two modes of the FR-ATM interworking service. When translation
mode is chosen for a PVC, the FR-ATM interworking function performs the
mapping of upper layer protocol encapsulations between the two incompatible
encapsulation methods. Translation mode allows the carriage of multiple
upper layer user protocols over the same PVC and the interworking of routed
protocols between a frame relay CPE and a B-ISDN CPE.
transmission control protocol (TCP)
A connection-oriented transport-layer protocol that provides reliable, robust,
and adaptable data transfer between end system upper-layer protocols (ULP).
TCP assumes that simple, potentially unreliable, datagram services are
available from lower-level protocols. TCP is defined in RFC 793.
trap
An unsolicited message from an agent to a manager containing information
about an exceptional event in that agent.
TRM
See transport resource manager (TRM) (page 136).
transparent data service (TDS)
A service offered on Nortel Multiservice Switch nodes that allows the user to
send bit or HDLC data across the network without interpretation. See also
bit-
transparent data service (BTDS) (page 20) and HDLC-transparent data
service (HTDS) (page 60).
transport resource manager (TRM)
A base routing system that acts as an intermediary between links and routing
systems. All Nortel Multiservice Switch trunks and DPN gateways on the
Multiservice Switch node are grouped into link groups by TRM and are
presented to the address plan managers (for example, topology and DPN
EAP) that use them. TRM is also involved in the multiplexing of logical network
numbers on the links. A third function of TRM is to maintain the link and link
group packet forwarding tables on all processors in a Multiservice Switch
shelf. TRM also directs some of the maintenance of forwarding tables for
various address plans on the FPs of the module.