Panasonic 1200N - Manual (Page 204)

L Glossary
B-42 Centillion 1200N ATM Switch User Manual
NTP 297-8103-903
Logical Node
An abstract representation of a peer group or a switching system as a single point.
Logical Node ID
A string of bits that unambiguously identifies a logical node within a routing
domain.
LOP
Loss of Pointer: A condition at the receiver or a maintenance signal transmitted in
the PHY overhead indicating that the receiving equipment has lost the pointer to
the start of cell in the payload. This is used to monitor the performance of the PHY
layer.
LOS
Loss of Signal: A condition at the receiver or a maintenance signal transmitted in
the PHY overhead indicating that the receiving equipment has lost the received
signal. This is used to monitor the performance of the PHY layer.
LPF
Low Pass Filter: In an MPEG-2 clock recovery circuit, it is a technique for
smoothing or averaging changes to the system clock.
LSAP
Link Service Access Point: Logical address of boundary between layer 3 and LLC
sublayer 2.
LSB
Least Significant Bit: The lowest order bit in the binary representation of a
numerical value.
LSR
Leaf Setup Request: A setup message type used when a leaf node requests
connection to existing point-to-multipoint connection or requests creation of a new
multipoint connection.
LT
Lower Tester: The representation in ISO/IEC 9646 of the means of providing,
during test execution, indirect control and observation of the lower service
boundary of the IUT using the underlying service provider.