VeEX MPA User Manual page 404

MPA_e_manual_D07-00-129P_RevA00
TC Overhead
Processing
TX Clock Loss
Threshold
Measured TX Line
Frequency
Enables or Disables Tandem Connection Monitoring (TCM)
transmit mode.
The following options are available for HP mappings.
•
Enable: For SDH, the unit uses its TCM circuitry and
the N1 byte to generate errors and alarms between
TCM equipment.
•
Disable: TCM mode is disabled, and the N1 byte
follows normal operation.
The following options are available for LP mappings.
•
HP Enable: For SDH, the unit uses its TCM circuitry
and the N1 byte to generate errors and alarms
between TCM equipment.
•
LP Enable: For SDH, the unit uses its TCM circuitry
and the N2 byte to generate errors and alarms
between TCM equipment.
•
Disable: TCM mode is disabled, and the N1/N2 bytes
follow normal operation.
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
Reference is configured for Recovered.
This setting and the associated alarm are disabled when
the TX Clock Reference is set to Internal or
For the MPM-100G and MPM-100AR cards, this setting is
supported on the MLD tab.
The measured TX line frequency for the currently configured
interface (based on the selected reference clock) is
displayed.
SDH Tab
TX Clock
Chassis clock.
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