Hi Rafi, There is a ring generator module available from:
Cambridge Electronics Laboratories 20 Chester St. Somerville MA 02144-3005 Tel 617-629-2805 Fax 617-623-1882 email 62075697@eln,attmail.com They have square, shaped, sine and fixed frquency outputs available. The sine output device is 2.5 times the cost of the square wave output device. I have one, I think it will do what you want. They are modules that require you provide power supplies (5V or 12V). The one I have is mounted in a fixture I made. I don't use it much anymore. I recently acquired an old HP 205AG Audio Signal Generator that can give 120V rms output and I adjusted to go down to 14 Hz. It has several failing it has tubes, uses a lot power, is huge and weighs 56 lbs. If there anything else I do for you please ask. Regards, Duane On Fri, 13 Dec 1996, Rafi Rahamim wrote: > Does anyone know of an efficient way to ring a 2500 telephone connected > to a short loop? Is there a commercial device? >
