Virtual Concatenation; Measurement Of Au Pointer Actions - Wavetek ANT-20 Operating Manual

ANT-20/ANT-20E
Evaluation
Bit error rate test
using pseudo-random bit sequence PRBS11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F2
Output
The overhead channels are output via the
DCC/ECC interface, socket [21] (V.11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F2, N1
2.3.2.2

Virtual concatenation

Display
Complete POH: (four channel-associated part POH). . . . . . . . . . . . . . . . . . . . . . . hexadecimal
Trace Identifier J1 (POH #1 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ASCII, plain text
Evaluation
Bit error rate test
using pseudo-random bit sequence PRBS11 (POH #1 only) . . . . . . . . . . . . . . . . . . . . . . . . . F2
Output
The overhead channels are output via the
DCC/ECC interface, socket [21] (V.11) (POH #1 only). . . . . . . . . . . . . . . . . . . . . . . . . . . F2, N1
2.3.3

Measurement of AU pointer actions

Evaluation
The AU pointer (pointer #1 in virtual concatenation) is indicated as an absolute value. The
direction and number of pointer movements are detected.
NDF (new data flag) is detected and counted (pointer #1 in virtual concatenation).
The differences (delta) between the pointer values of pointers #2 to #4 and pointer #1 are
determined and recorded (virtual concatenation).
Maximum delta . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 40 pointers / ± 6.17 µs
Specifications OC-12c/STM-4c
Concatenation Options
S-17