VeEX MPA, User Manual

Page: 284 / 842

SONET Tab
284
TC Overhead
Processing Enables or Disables Tandem Connection Monitoring (TCM)
transmit mode.
The following options are available for STS mappings.
•
Enable : For SONET, the unit uses its TCM circuitry
and the Z5 byte to generate errors and alarms
between TCM equipment.
•
Disable : TCM mode is disabled, and the Z5 byte
follows normal operation.
The following options are available for VT mappings.
•
Path Enable : For SONET, the unit uses its TCM
circuitry and the Z5 byte to generate errors and alarms
between TCM equipment.
•
VT Enable : For SONET, the unit uses its TCM circuitry
and the Z6 byte to generate errors and alarms
between TCM equipment.
•
Disable : TCM mode is disabled, and the Z5/Z6 bytes
follow normal operation.
TX Clock Loss
Threshold Configures the user-definable threshold for the TX Clock
Loss alarm, in PPM, using an on-screen keypad..
When the Measured TX Line Frequency Offset exceeds the
TX Clock Loss Threshold, then the TX Clock Loss alarm
begins to accumulate.
Valid range is from 0 to +/- 300 ppm, in increments of 0.1
ppm, where 0 ppm is disabled. The default value is +/- 50
ppm.
This threshold alarm is only supported when the TX Clock
Reference is configured for Recovered .
This setting and the associated alarm are disabled when
the TX Clock Reference is set to Internal or Chassis clock .
For the MPM-100G and MPM-100AR cards, this setting is
supported on the MLD tab.
MPA_e_manual_D07-00-129P_RevA00