VeEX MPA User Manual page 344

MPA_e_manual_D07-00-129P_RevA00
The APS function monitors incoming APS activity. It logs and displays the K1 and K2
byte sequences received by the unit. A maximum of 15 byte sequences can appear on
the screen.
The Results APS screen contains the following options:
Option
APS Summary
APS Decode
APS View 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
Description
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.
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.
Allows the user to view decoded K1 and K2 byte values in
either Linear Protection Switching Mode or Ring APS
Signaling Mode.
SONET Tab
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