Panasonic 15000 manual TTC2M, Ubr

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List of terms

trivial file transfer protocol (TFTP)

A protocol that governs transferring files between nodes without protection against packet loss.

trunk

The generic term for a physical connection, not a Nortel Multiservice Switch network-specific term.

trunk conditioning (TC)

A technique whereby a constant bit pattern is applied to specific time slots to indicate downstream that the system has detected a fault in the upstream data path.

trunking (acknowledged)

The receiving node confirms the quality of the received packets and requests retransmission of corrupted packets.

trunking (unacknowledged)

The receiving node does not acknowledge the receipt of packets.

TTC2M

Japanese Telecommunication Technology Committee 2 Mbit/s PBX-TDM interface, referencing TTC JJ-20.10, JJ-20.11, JJ-20.12.

tunneling

A protocol encapsulation process that embeds propriety protocols, such as MPANL, into a carrier protocol, such as frame relay.

Type 2.1 (T2.1) node

A local exchange node (LEN) node.

type of service

The 8-bit field in an IP packet header used for specifying differentiated service parameters for the IP packet. The 6 most significant bits of this field are also known as the differentiated services code point (page 42) (DSCP).

U-plane

In frame relay, the data transfer protocol or U-plane is the protocol used for the transfer of the actual user data. The protocol is based on T1.618, which is based on a subset of ANSI T1.602 (LAPD). For more information, see NN10600-900 Nortel Multiservice Switch 7400/15000/20000 Frame Relay Technology Fundamentals.

UBR

See unspecified bit rate (UBR) (page 138).

Nortel Multiservice Switch 7400/15000/20000

Terminology

NN10600-005 7.2S1 Standard

PCR7.2 and up March 2006

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