Applications for Portable E1 Switches
First a E1 Switch.
In this case, you want to switch one incoming E1 pair to a one of up to three destinations. perhaps when one of the destination routes is unavailable or goes down.
The diagram shows the routing.
This is easily set up using the supplied Windows app, and will be retained in non-volatile memory until changed again.
Now the opposite, a
, selecting one destination from up to 3 sources. This could be the ‘other end’ of your redundant system, or simply a way of selecting a stream for monitoring or routing elsewhere.
Of course, if you have two source and two destination streams you have a simple 2×2 cross-point switch!
If you need to select timeslots and coalesce them into a single E1 stream, this is the way to do it.
You can connect directly to RJ-48 E1 streams or as we’ve shown here, use Baluns from 75Ohm co-axial lines. High impedance input mode means that your system can connect directly to Protected Monitoring Points. You’ll need a framing timeslot in the groomed output, that should be routed from Timeslot 0 of E1 Stream 1. After that, you can choose any of the input stream timeslots to populate the groomed output, including up and down traffic.
And if you need to keep a record of the data, you can use our recording application to store data streams to disk on your pc.
For discrete, anonymous or non-invasive monitoring of E1 lines you need to tap into them. In this application we’ve shown how you can make use of our Active Data Taps, E1DT. These can be inserted directly in the main lines to be monitored because they have a direct continuous path so even if the power is out or the devices suffer permanent electrical damage, line continuity is maintained. High impedance buffers are used via isolating transformers to recover low level signals and split them into two.
This means that two standard inputs of E1UC can be used, one for Tx signals and one for Rx signals. And because E1UC is a 4-port device, two sets of lines can be monitored simultaneously.
The collected signals can be recorded direct to pc, monitored in real time and/or groomed and sent to another location.
Recording uses a plain format that includes a high-resolution timecode, data integrity and data management information. This means that recordings can be archived and retrieved later to be viewed and analysed either as direct files or re-constituted and replayed as original E1 data streams. The latter of these is very useful if you want to stress a particular transmission component with the same data repeatedly or to unmask occasional non-repetitive faults during transmission testing.
DAB ETI Ensemble Monitoring
Monitoring includes a graphical display of each input stream in real time and, with the DAB option, top level decoding to identify Transport Layer integrity, Ensemble ID and Labelling, and real-time LI Frame statistics.
For testing, data origination or source data creation, you can use E1UC as a source of E1 data. For repetitive testing, you can create file data with a variety of formats, signalling etc containing data that represents your situation or application. Your source data can also be streamed from another application and multiplexed into a new stream.
E1UC has an internal clock to generate the correct stream rate, or it can accept a system clock from an existing E1 stream That’s what is shown in this diagram.
If you need any advice on these applications, contact us and we will be pleased to advise. Or if you have applications you would like to share we would be pleased to post them here. And if you think E1UC should be able to do even more then let us know!.