VeEX MPA, Руководство пользователя

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SDH Tab
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The Results APS screen contains the following options:
Option Description
APS Summary When selected, the following information appears in the
results table last 15 K1 and K2 byte sequences received:
•
The HEX value of the K1 byte.
•
The HEX value of the K2 byte.
•
The number of frames received that contain the K1
and K2 bytes.
•
The elapsed time of the frames that contain the K1
and K2 bytes.
To view decoded values for a specific Item, select the
Item number. The APS Decode dialog box appears
displaying the Item's configuration.
APS Decode When selected, the results table splits into two horizontal
tables: the top table displaying K1 results; the bottom table
displaying K2 results.
The K1 table decodes the value for bits 1-4 and bits 5-8.
The K2 table decodes the value for bits 1-4, bit 5, and bits
6-8.
Also displayed in the tables are the number of frames
received that contain the K1 and K2 bytes, and the
elapsed time of the frames that contain the K1 and K2
bytes for the last 15 byte sequences received.
APS View Mode Allows the user to view decoded values in either Linear
Protection Switching Mode or Ring APS Signaling Mode.
Per GR-253-CORE, only the upper 12 bits of the K1/K2 bytes (K1 bits 1-8 and
the K2 bits 1-4) are used for APS operation. K2 bit 5 sets the APS mode type (1+1,
1:n) and cannot be changed during operation. K2 bits 6-8 are for alarms. Any
changes to the lower four bits of the K2 byte do not affect APS operation. The
Results APS table only starts and displays a new entry item if the upper 12 K1/K2
bits stabilize on a new value for a minimum of three consecutive frames.
MPA_e_manual_D07-00-129P_RevA00