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FAQ for the products in the PT-Family


On this page we will answer some of the questions relating to the products in the PT-Family. This information may help in your decision when looking for a product, installing the product, or can be used in the event of a problem when installing. The contents of the FAQ's are the results of set questions to NovaTec and therefore can and will be regurlarly updated.




For which interfaces can the PT be used?

The PT Family supports the ISDN-BRI (S0 ) Interface, the ISDN-U0-Interface and the ISDN-UP0 -Interface.
Which functions does the PT typically fulfill?

The main application of the PT's is divided into two groups. On the one hand the range extension, this concerns the S0 -Interface that has to be extended. You can find a couple of  application examples here.

The second group concerns the Interface conversions, from BRI (S0) and U0 and/or BRI (S0) and UP0.  You can find a couple of example applications here.

Which technical requirements are necessary to consider in regards to the cable between the PT's, if I want to extend the range? The maximum length between the PT's depends on the quality and thus the line loss of the cable. We have experienced that with a cable with a diameter of 0.6 mm ranges are reached of up to 8 km. In principle applies: the thicker the cable the higher the range. In the cable there should be no intermediate amplifiers or filters, which may restrict or interfere with the range. As an estimated limit value absorption of 40 dB with 40 kHz.
I would like to operate several terminals at the end of the cable. Can this be done? No problem. The PT-US gives you a complete ´BRI (S0 )-Bus, that can be used to operate several end devices.
I would like to operate end devices both before and after the line terminals. Can this be done? Unfortunately not. This will not work with the use of  PT's, the end devices may be operated ONLY on the PT-US.
Instead of an ISDN telephone can I connect a switch to the PT-US? Of course you can attach a switch instead of a ISDN telephone to the PT-US and connect two switches together.  Consider however that you have only two B-channels available (connections) over the connection between the switches per line. When planning you should examine whether this capacity is sufficient and if necessary increase the number of Connections.
Can the PTs be used with older switches that still used the 1TR6 protocol? The PTs are Protocol transparent, and therefore can be used with 1TR6, EDSS1 and most manufacturer specific protocols.
Can the PT-UPS be used on a switch that has a UP0 -Interface where a BRI/S0-End device needs to be connected? This is the ideal operation of the PT-UP S. Here you can find details of this use.
How are the PT's supplied with mains power? The mains power supply is integrated in the PT, this should be plugged into the mains power the same as a normal plug..
Does the PT-SU require power feeding on the BRI (S0)-Interface? For the actual function it doesnt matter if there is power feeding on the BRI (S0) from the switch or not. The PT-SU passes this power over two internal 4,7 KOhm resistors to the U-Interface. This power can also be used to remotely turn the PT-US on and off. Detailed information can be found in the Guideline.
I would like to power the PT's with batteries, is this possible? The PT's can be supplied as a special version with different voltages e.g. 110V or DC voltage. Please contact your relevant sales manager for details.