The reason Mitel does not provide this vital part is due to the huge range of specifications you need to comply with.

The application schematic for this really depends on where in the world you are. Different contries have different line, and thus transformer, impedances. Voltages frequencies, cadences etc. are different too, so it is not so easy. Finally there are issues with Telecoms type approval and safely approvals. Each country need their own approval and compatibility test. If you are in the US or Canada and want to buy a pre-approved part, you should try www.cermetek.com. If you want to roll your own, or are in another country, you will have to obtain the specifications from the various telecom authorities (FCC in the US)


Jesper