Testing Switch And Sensor Functions; In-Service Monitoring Of Tributary Channels - Wavetek ANT-20 Operating Manual

M13 MUX/DEMUX
2

Testing switch and sensor functions

Switch functions
SONET network elements process asynchronous (DSn) signals of various hierarchy levels.
Complex, interleaved signal paths occur, particularly in modern SDH network nodes (cross-
connects). The linking of the M13 multiplex function to the SONET mapping functions in the
ANT-20 makes the instrument ideal for testing complex switching functions.Tests can be
performed between two SONET ports, two DSn ports or between a SONET and a DSn port.
Alarm sensor test
Comprehensive facilities for inserting errors at the DS1 and DS3 levels allow testing of the
monitor functions built in to the network elements. This is particularly useful during installation
work, as the network management systems are dependent on the correct functioning of these
sensors during subsequent operation.
3

In-service monitoring of tributary channels

The demultiplex function provides access to the tributary channels right down to the DS1 level.
This permits pinpoint in-service monitoring of individual channels in DSn signals and in SONET
signals when the appropriate mappings are employed.
I-2
ANT-20/ANT-20E
Introduction