Cisco BPX-BXM-155-8DX Installation And Configuration Manual page 618

Glossary
S
The process of breaking a dataframe containing data from a number of virtual paths or circuits apart
SSAR
(Segmentation and so that the individual paths/circuits can be switched by reassembling the data into a new frame with a
Reassembly) different sequence.
An IGX backcard that works in conjunction with the NPM. The SCM provides a centralized clock
SCM (System Clock
generation function and provides serial and LAN port interfaces.
Module)
Rate above which incoming cells are either tagged or discarded.
SCR (Sustainable
Cell Rate)
SDP (Synchronous
Data PAD)
The back card for the HDM (IGX switch) cards. The SDI is available with V.24, X.21, and V.35
SDI (Synchronous
Data Interface) interfaces.
A concept for grouping connections that share a common set of traffic characteristics and QoS
Service Class (aka
Service Type) requirements. The terms "service class" and "service type" are sometimes used interchangeably. In
this release, there are some major service categories, such as VbrRt, VbrNRt, CBR, Abr, and Ubr, and
under these major service categories are service types such as VbrRt1, VbrRt2, VbrRt3, and VbrNRt1,
VbrNrt2, and so on. Sometimes the terms service class and service type are used interchangeably.
The collection of data items that support the service class template concept, and implemented on a
Service Class
per-VI basis on the BXM. These items include a copy of the specific Service Class Template selected
database
for a VI, as well as additional data as required.
A set of data structures that map VSI service types to sets of pre-configured VC and Qbin parameters.
Service Class
Template (SCT) Consists of two sub-components—a VC Descriptor Template and a Class of Service Buffer descriptor
template.
Refers to FastPacket to ATM interworking with respect to the IGX node. In the simple gateway mode,
Simple Gateway
FastPackets are encapsulated in their entirety into cells. Compare with complex gateway.
A set of circuits common to all BPX cards used for transmitting and receiving via the crosspoint
SIU (Serial
Interface Unit) switch.
A PVC in the INS Dial-Up Frame Relay application that is dormant in the networks database until it
Soft PVC
is activated by a call into the network by a user.
An network topology in which there is only one path available between any two sources in a frame
spanning tree
relay multicast group. Spanning trees are required to prevent frames broadcast from a single source
to multiple receptors from circulating endlessly around the network a result of frame relay circuits not
having properly closed loops.
Determining the presence or absence of speech for Digital Speech Interpolation. Performed in either
speech detection
the CDP card.
A data clocking configuration where the timing for the transmit data is obtained from one source (such
split clock
as a user device) and the timing for the receive data is obtained from another source (such as a switch).
A message transmitted by a FR NNI port requesting an updated status from the attached foreign
Status Enquiry
network. This message is used as a heartbeat to detect when a port has failed.
Cisco BPX 8600 Series Installation and Configuration
18
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001