Glossary M
Centillion 1200N ATM Switch User Manual B-47
NTP 297-8103-903
MPOA Target
A set of protocol address, path attributes, (e.g., internetwork layer QoS, other
information derivable from received packet) describing the intended destination
and its path attributes that MPOA devices may use as lookup keys.
MSB
Most Significant Bit: The highest order bit in the binary representation of a
numerical value.
MT
Message Type: The field containing the bit flags of a RM-cell. These flags are as
follows:
• DIR = 0 for forward RM-cells = 1 for backward;
• RM-cells BN = 1 for Non-Source Generated (BECN)
• RM-cells = 0 for Source Generated RM-cells
• Congestion Indicator (CI) = 1 to indicate congestion = 0 otherwise NI = 1 to
indicate no additive increase allowed = 0 otherwise
• RA -- Not used for ATM Forum Available Bit Rate (ABR).
MTBF
Mean Time Between Failures: The length of time a user may reasonably expect a
device or system to work before an incapacitating fault occurs.
MTP
Message Transfer Part: Level 1 through 3 protocols of the SS7 protocol stack. MTP
3 (Level 3) is used to support BISUP.
Multicasting
The transmit operation of a single PDU by a source interface where the PDU
reaches a group of one or more destinations.
Multiplexing
A function within a layer that interleaves the info r mation from multiple
connections into one connection.
Multipoint Access
User access in which more than one terminal equipment (TE) is supported by a
single network termination.