Nortel 15000 Terminology page 132

T4
Timing towards a 2 MHz (or 2 Mbit/s, no payload) synchronization interface.
tag control information (TCI)
Tag control information (TCI) is a subheader of the IEEE 802.1Q tag header.
It consists of two octets encoded with user-priority bits, a canonical format
indicator field, and a VLAN identifier.
tag protocol identifier (TPID)
Tag protocol identifier (TPID) is a subheader of the IEEE 802.1Q tag header.
It consists of two octets encoded with the 802.1Q tag type for VLANs. The
format of the encoding is dependent on the type of encoding supported: SNAP
or Ethernet.
tandem node
A node between the ingress and egress nodes that decides independently the
best packet forwarding route to the egress node identified in the packet. See
egress node (page 47)
tandem pass through (TPT)
A software process that allows MVP-E FPs on tandem Nortel Multiservice
Switch nodes to dynamically detect each other and pass, without modification,
compressed voice data through an intermediate voice switch. Voice Transport
and Voice Networking support TPT.
TC
See trunk conditioning (TC) (page
TCI
See tag control information (TCI) (page
TCP
See transmission control protocol (TCP) (page
TDM
See time-division multiplexing (TDM) (page
TDMA
See time-division multiple access (page
TDP
See traffic descriptor parameter (TDP) (page
TDS
See transparent data service (TDS) (page
Copyright © 2006, Nortel
- 132 -
List of terms
and ingress node (page
Nortel Multiservice Switch 7400/15000/20000
Terminology
NN10600-005 7.2S1 Standard
PCR7.2 and up March 2006
64).
137).
132).
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