Victoria is the only test and measurement instrument you'll need for everything from installing fiber to preventive maintenance:

Jitter and Wander tests in multiplexers
Network elements have to pass jitter and wander tolerance, transfer and generation tests at their outputs according to the levels defined by ETSI and Bellcore. Their response to a forced clock reference change or loss of synchronization signal and pass to holdover must also be measured.

Tolerance level
Some links such as international circuits, xDSL and ISDN require certain levels of jitter tolerance as defined in the ONP and other standards that must be checked with the simulations available in Victoria.

Network synchronization
The synchronization network must be perfectly defined in terms of the PRC, SSU and SEC clocks it is made up of and how these are distributed. Checks must be made that each of these elements is within the tolerated limits for MTIE and TDEV as described in the masks also displayed by Victoria. A long-term measurement identifies the causes that provoke pointer adjustments, wander and eventually errors.

Video measurements
PAL and NTSC standards define color subcarrier frequency offset and drift limits for video signals. Nowadays these signals are conveyed in SDH or SONET networks mapped into tributaries, typically at 34 and 45Mbit/s. From TIE measurements on these tributaries, Victoria Jitter/Wander calculates the values of the frequency offset and drift parameters. This is useful not only when checking for compliance with standards, but also for assessing the performance of video decoders used in the network under test. 

Fiber and coaxial tests
Once the transmission medium (fiber, cable or radio) has been installed, continuity, BER and optical power must be checked in each section and end-to-end.

Testing network elements
Before they are connected, multiplexers must pass mux/demux tributary tests and M/N stress tests that activate the generation of errors and alarms. Their behavior when faced with offsets, G.783 pointer sequences etc must also be studied.

Bringing into service
Next, the network elements and transmission media are connected together to form the topology of the transmission network. This is when the transport of end-to-end circuits through the network must be validated. This is done by means of a series of tests, such as BER tests in VCs, RTD, transparency tests for all RSOH, MS, POH bytes and trail trace in J0, J1 and J2.

Service Level Agreement (SLA) 
Operators must guarantee their clients a certain level of quality for the services they offer in terms of performance (G.821, G.826, M.2100 and M.2101) and unavailability time when faced with a breakdown that provokes APS (Automatic Protection Switching). The results can be printed out and delivered to clients as proof of compliance with the terms agreed.

Internetworking
Applications that make use of several networks connected to each other in tandem and belonging to different owners are becoming more and more common. When a breakdown occurs or there is a deterioration in quality, the cause must be identified using the TCM protocol that is also available in Victoria.

Preventive maintenance
Centers with groups of experts perform long-term ISM measurements. With Victoria they will have specialized screens, graphs and traces at their disposal showing all the alarms, errors and pointer movements that occur. They will also be able to evaluate wander, the prime cause of errors, by means of TIE measurements..