1100 Signal fail (span)
1011 Signal fail (ring)
1010 Signal degrade (protection)
1001 Signal degrade (span)
1000 Signal degrade (ring)
0111 Manual switch (span)
0110 Manual switch (ring)
0101 Wait to restore
0100 Exercise (span)
0011 Exercise (ring)
0010 Reverse request (span)
0001 Reverse request (ring)
0000 No request
Bits 5-8 are the destination node ID
0000 Null channel
0001 to 1110 Channels 1 thru 14
1111 Extra traffic channel
K2 Byte (APS-Linear)
Conforms to ITU-T G.783 and Bellcore GR.253
Used to activate and deactivate the switching between the main and protection paths on a multiplexer section
Used to communicate Alarm Indication Signal (AIS) and Remote Defect Indication (RDI) conditions
Bits 1-4 selects bridged channel used
Bit 5 determines APS architecture
1+1
1:N
Bits 6-8
110 MS-RDI
111 MS-AIS
Others Not used
K2 Byte (APS-Ring)
Conforms to and follows ITU-T G.841 Bellcore GR.253 recommendations
Used to activate and deactivate the switching between the main and protection paths on a multiplexer section
Used to communicate Alarm Indication Signal (AIS) and Remote Defect Indication (RDI) conditions
Bits 1-4 are the source node ID
Bit 5 is the path code
0 Short path
1 Long path
Bits 6-8
000 Idle
001 Bridged
010 Bridged and switched
110 MS-RDI
111 MS-AIS
Others Not used
K2 Byte (APS-Linear)
RXT-3900 e-Manual D07-00-111P Rev A00
Summary of Contents for RXT3900
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