Cisco BPX 8620 Installation And Configuration Manual page 586

Glossary
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).
segmentation and reassembly.
SSAR
The process of breaking a dataframe containing data from a number of virtual paths or circuits apart
so that the individual paths/circuits can be switched by reassembling the data into a new frame with a
different sequence.
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.
On the BPX switch, contains crosspoint wiring used to carry ATM trunk data between both the
StrataBus
network interface and service interface modules and the crosspoint switch as well as providing
control, clock, and communications.
Multiple low-speed data circuits carried in a single DS0 timeslot.
subrate data
Single high-speed data circuit carried in multiple DS0 timeslots.
superrate data
See SCR.
sustainable cell rate
switched virtual circuit.
SVC
A virtual circuit that is dynamically established on demand and torn down when transmission is
complete. SVS do not need to reserve any network resources when they are not in use. Called a
switched virtual connection in ATM terminology. Compare with PVC.
See SVC.
switched virtual
circuit
See SDI.
synchronous data
interface
See SDP.
synchronous data
PAD
See SCM.
system clock
module
T
The standard US. multiplexed 24-channel voice/data digital span line. Operates at a data rate of
T1
1.544 Mbps.
Transmission service at DS3 rate of 44.736 Mbps.
T3
transient buffer exposure.
TBE
The negotiated number of cells that the network would prefer to limit the source to send during the
start-up period.
Cisco BPX 8600 Series Installation and Configuration
GL-20
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005