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List of terms

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)

Aconnection-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.

Nortel Multiservice Switch 7400/15000/20000

Terminology

NN10600-005 7.2S1 Standard

PCR7.2 and up March 2006

Copyright © 2006, Nortel

Nortel Confidential

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Panasonic 15000 manual Trm