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Setting the Interfaces
Setting SDH Transmit Interface
Setting SDH Transmit Interface
Payload Selection
One of the key features of the OmniBER 718 is the ability to test concatenated
payloads, read the following for a brief description of concatenated payloads, and
the benefits of using them.
Concatenated Payloads
Bulk filled or contiguous payload structures e.g. (STM-4c) are designed for carrying
broadband services. The entire payload area is used to carry the service with no
structured mapping or channelization.
In the case of a concatenated STM-4 (denoted STM-4c), the virtual container area is
entirely filled by a single VC-4-4c. This VC-4-4c consists of one Path Overhead and
a single container capable of carrying a tributary signal at rates up to approximately
600 Mb/s. Once assembled a VC-4-4c is multiplexed, switched and transported
through the network as a single entity.
Benefits: Test the entire bandwidth in one go, and reduce test times. The following
table illustrates the reduced test times using concatenated payloads.
Table 2
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Test times using concatenated payloads
Test Time (based on 100
Performance
STM-4c
test limit
Container
14
12 days
10-
13
1.2 days
10-
2.90 hours
12
10-
11
0.3 hour
10-
10
1.75 minutes
10-
errors)
STM-1 Bulk
Payload
48 days
4.8 days
11.6 hours
1.2 hour
7 minutes
29
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