In B 11-23 A edition 2 dated July 1996, the metering pulses are mentioned in an informative section (actually the same text as in ETS 300001 i.e. 12 kHz +/-120 Hz etc).
For determining the actual use of these pulses, try to contact France Telecom. Here in Sweden, we have 12 kHz pulses as well but as far as I know they only exist on lines intended for payphones. It may be the same in France. Roger Magnuson TGC AB Sweden ---------- From: [email protected] Sent: Thursday, May 08, 1997 05:28 To: "INTERNET:[email protected]" ; "[unknown]" <[email protected].; GECAB/EST/ROGER Subject: France - Billing Tone?? Dear Treggers, Scott Roleson writes: "I've heard a rumor that 12KHz billing or metering tones may exist in France. This has taken me by surprise - I didn't think there were any billing tones in France! Perhaps they are only available by special subscription, or only in certain areas?" According to ETSI 300 001 (NET 4), 3rd ed., dated March, 1996, metering pulses are indeed transmitted at 12 kHz. The area of detection for a taxometer device is +/- 120 Hertz. Without delving too deeply into the requirements, it certainly looks as if all the usual parameters apply, such as return loss of a TE at the metering pulse frequency, insertion loss of a series-connected TE at the metering pulse frequency, and so on. Clearly, ETSI gives no indication about the statistics of metering pulse availability. Maybe it is rare, maybe not; however, I doubt whether that is relevant. The absolute authority in France is B11-23A, rather than the French national paragraphs of NET 4. Unfortunately, I haven't a copy of B11-23A. However, I believe the two documents are very similar. Other Treggers with a copy of B11-23A could confirm whether B11-23A also refers to 12 kHz metering pulses. While we're on the subject, here is the full list of metering pulse frequencies for Europe, as given in ETSI NET 4: 12 kHz.: Austria, France, Hungary, Iceland, Ireland, Spain, Sweden and Switzerland; 16 kHz.: Belgium, Bulgaria, Cyprus, Finland, Germany, Greece, Luxembourg, Norway. I hope that this is helpful, David Drori -------------------------------------------------------------------------- - ------------------ Novarex Enterprises Ltd., POB 2833, Jerusalem 91028, Israel. Tel: +972 2 581 0995 Fax: +972 2 581 3750 Mobile: +972 5 067 8686 E-mail: novarexÉcompuserve.com -------------------------------------------------------------------------- - ------------------ <<File: UUCP_ENV.TXT>>
