At 08:25 02/09/99 +0530, Ravi Pailoor wrote:
>Is it 15 KHz or 16 KHz ? Here in India, we have 16 KHZ metering pulses.

yes, you're right, it's 16kHz in germany as well. and it's gotten slightly
confusing there since i left: they opened the long distance carrier market,
and since the telcom switches don't transmit billing information, calls
using one of the optional carriers (a similar access system as with the
1010257 or so prefixes here in the usa) don't provide the billing pulse.

many hotels and other enterprises seem to have troubles adapting to the new
situation of the possibility of having calls on the system that don't
provide a billing pulse but nevertheless get billed -- probably in the
beginning a couple of verrry smart guys got away without paying their phone
bill :)

FWIW, at http://www.ct.heise.de/ct/faq/hotline/97/05/hotline9705_15.shtml
is a nice suggestion to wire a modem with a filter so that the modem signal
goes through the filter but not the phone signal (if you're using a pulse
counter in the phone). no other components necessary.

ge