Oc-48C/Stm-16C - Wavetek ANT-20 Operating Manual

Concatenation Options
This allows the VC-4-4v signal to be split into sub-VC-4 signals. The individual sub-VC-4 signals
can be transmitted via different paths, resulting in different propagation delays for the
containers. On termination in the receiver of the ANT-20, the individual VC-4s are recombined
into a single signal.
The main application for the "OC-12v/STM-4v VIRTUAL CONCATENATION" option is in
measuring the propagation delays of individual sub-VC-4s over the different transmission paths.
The delay differences for the individual VC-4 containers can be measured if the Pointer
Analyzer is also used. The delay differences for all four concatenated containers are displayed
versus time, allowing you to assess the suitability of the selected paths for transmission.
Delta pointer actions can be directly set in the ANT-20 Pointer Generator to offset all four
pointers of the concatenated container. In this way, termination in the interface modules of
network elements can be tested. Such modules must be equipped with adequate buffers in
order to equalize out possible differences in delay times.
The Overhead Generator and Overhead Analyzer can be used to manipulate, analyze and
interpret the overhead bytes (SOH, POH or TOH).
2.2

OC-48c/STM-16c

The "OC-48c/STM-16c" options expand the applications of the virtual instruments (VI) of the
ANT-20 to include the following signal structures:
• STS-48c SPE
• VC-4-16c
• STS-12c SPE
• VC-4-4c
These signals have a payload bit rate of 2396.160 Mbit/s or 599.040 Mbit/s.
Fig. I-5
I-6
Contiguous Concatenation
Contiguous Concatenation
Contiguous Concatenation
Contiguous Concatenation
Contiguous concatenation, OC-48c/STM-16c
ANT-20/ANT-20E
Introduction