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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
switched virtual path (SVP)
1 A type of virtual path (VP) that is established and torn down by subscriber
applications on an as-needed basis. It is a logical connection that remains
in place only for the duration of data transfer. User equipment signals the
desired destination, and the connection route is selected automatically
through SVP signaling.
2 See also virtual path (VP) (page 142).
switched voice
1 A Nortel Multiservice Switch 7400 node feature in which TDM traffic from
a narrowband network is terminated at a Multiservice Switch
7400 node
and dynamically routed over the ATM network.
2 See also non-switched voice (page 91).
switchover
See hitless CP switchover (page 61).
symmetric encryption
A key is symmetric when both peers use the same private key, ensuring
security.
synchronous digital hierarchy (SDH)
The international version of the Telcordia SONET standard, based on STM-1
frame. The basic line rate is 155.52 Mbit/s. SDH is defined by ITU-T.
synchronous equipment timing source (SETS)
Refers to the BITS output port on the CP. See building-integrated timing
supply (BITS) (page 21).
synchronous optical network (SONET) standard
A ultra-high-speed fiber-optic transmission standard developed by Telcordia
for fiber-based digital transmission networks. SONETV is the North American
version of SDH and is based on STS-1.
System Network Architecture (SNA)
A proprietary network architecture developed by IBM. SNA shares some
characteristics with the OSI reference model.
T1
See DS1 (page 44).
T3
Timing signal derived from an external 2 MHz (or 2 Mbit/s, no payload)
synchronization interface.