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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
security policy database (SPD)
A database containing all of the policies that define the security protocols for
all IP traffic flows in and out of a peer.
segmentation and reassembly (SAR) sublayer
A sublayer of an AAL that performs segmentation of the higher-layer PDUs
into ATM cell payloads and receives ATM cell payloads to be reassembled into
higher-layer PDUs.
serialization delay
Serialization delay is the time to clock a frame or cell into or out of a device
(Nortel Multiservice Switch node).
service
A software application. Examples of a Nortel Multiservice Switch service:
frame relay and ATM bearer service.
service access point (SAP)
The service access point of a protocol layer is the point at which an upper
(client) layer requests service from the layer.
service bundle
A Nortel Multiservice Switch feature that packages software for downloading
to the network processing units (NPUs) on a GQM-based FP.
service data unit (SDU)
The entire packet of data received from the immediate upper (client) layer to
be serviced by a protocol layer. The PDU of the client layer is the SDU of the
next lower layer.
service interworking function (SIWF)
1 The FR-ATM SIWF enables frame relay customer-provided equipment
(CPE) to communicate with ATM-capable CPE. The SIWF maintains
standard interworking between frame relay and ATM equipment, and
maps frame relay DLCIs to ATM VCCs on a one-to-one basis. The FR-
ATM service interworking function is based on the FRF.8 standard.
2 See also, FR-ATM interworking service (page 56).
service request (SR)
A request for Nortel Networks to fix a problem.
service-specific convergence sublayer (SSCS)
A sublayer of an AAL that adapts the specific requirements of the service
utilizing the AAL to the lower common AAL sublayers.