VeEX MPA, User Manual

Page: 820 / 842

M
820
For SDH, Multiplex Section. Contains the information required between the multiplex
section termination equipment at each end of the MS (that is, between consecutive
network elements excluding the regenerators).
MSOH
For SDH, Multiplex Path Overhead. 18 bytes of overhead accessed, generated, and
processed by MS terminating equipment. This overhead supports functions such as
locating the payload in the frame, multiplexing, or concatenating signals, performance
monitoring, automatic protection switching, and line maintenance.
MS-AIS
For SDH, Multiplex Section - Alarm Indication Signal. MS-AIS is generated by Section
Terminating Equipment (STE) upon the detection of a Loss of Signal or Loss of Frame
defect, on an equipment failure. MS-AIS maintains operation of the downstream
regenerators, and therefore prevents generation of unnecessary alarms. At the same
time, data and orderwire communication is retained with the downstream equipment.
MS OK
For SDH, Multiplex Section Overhead OK. In the Quick Status LEDs area, this is a
status LED.
MS-RDI
For SDH, Multiplex Section - Remote Defect Indication from a K2 byte. A signal
returned to the transmitting equipment upon detecting a Loss of Signal, Loss of Frame,
or MS-AIS defect. MS-RDI was previously known as MS-FERF.
MS-REI
For SDH, Multiplex Section - Remote Error Indication from a K2 byte. A signal returned
to the transmitting equipment upon detecting a Loss of Signal, Loss of Frame, or MS-
AIS defect
MTU
Maximum Transmission Unit
Multiplexor
A device for combining several channels to be carried by a single physical channel.
MUX
MPA_e_manual_D07-00-129P_RevA00