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List of terms
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
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
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)
1The
2See also,
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.
Nortel Multiservice Switch 7400/15000/20000
Terminology
PCR7.2 and up March 2006
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