dear Duane I know only the part of data end equipment, and this you find in the techn. requirements for PSTN Access. See also under internet adress http://www.admin.ch/bakom/index.htm. Here the test for data end equipment (3.3.6.5 in the techn. requirements for PSTN Access ): 12 kHz, 100 ms on-off time, -2dBV EMK (600 Ohm generator).
konrad >Konrad, > >After reading the TREGS email on metering tones some other questions occured >to me. If you don't mind I would like to ask the following: > >1. Do you know what mechanism is used to transmit the metering >tones? > >2. How it is generated? > >3. In other words is it a sinewave with a small amount of distortion or >a square wave? > >4. What is the shape of the 12 KHz burst when transmitted? i.e Does it >have a well behaved exponential rise and fall? > >5. What is the duration of metering tone in Switzerland? > >I am asking these questions because I build a metering tone generator that >transmits a burst with good exponential rise and fall. It designed mainly >for testing German DAA and it works well. Although it wasn't needed at >the time I also included Swiss capablities. I just want to make sure I >didn't miss something. Reading the TREG email made me a little a nervous. >I thought maybe metering tones in Switzerland might not be clean sinewaves >and/or were transmitted at a much higher level than Germany. > >Thank you again. > >Amities, > >Duane
