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Herebelow is given an example of the end to end delay; it is the sum of the following values:
physical line delay = 5 µs/Km
–
delay for each OMSN pass through = 5
10 µs/NE
–
–
latency.
In a 1000 Km long network (5us/Km) and made up of 100 OMSNs equipment (5
10 µs/NE) using a Fast
Ethernet board 8 x VC–12 / 512 bytes mapped, the end to end delay is equal to:
(1000 Km x 5 µs) + (100 x 10 µs) + 3452 µs = 9452 µs
Allowed differential delay in case of concatenation
VC–12 concatenation = 35 ms
VC–3 concatenation =
VC–4 concatenation =
ED
02
3 ms
256 ms
3AL 91669 AA AA
674
274
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674
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