Path: utzoo!utgpu!watmath!clyde!att!osu-cis!killer!vector!nobody From: covert%covert.DEC@decwrl.dec.com (John R. Covert) Newsgroups: comp.dcom.telecom Subject: Touch-Tone around the world Message-ID: Date: 11 Dec 88 10:46:00 GMT Sender: chip@vector.UUCP Lines: 18 Approved: telecom-request@vector.uucp X-Submissions-To: telecom@bu-cs.bu.edu X-Administrivia-To: telecom-request@vector.uucp X-TELECOM-Digest: volume 8, issue 199, message 1 >Also, does anybody know if the tone-dial equipment there [U.K. and Europe] >uses the same tone-pairs as we do here? Yes. It is CCITT standard Q.31. There are now a few (very few) U.K. exchanges which provide DTMF service to subscribers. Although System X can do it, very, very few exchanges permit subscribers to use it. DTMF is fairly common in PBXs, however, the U.K. requires the DTMF level to be set quite low to prevent crosstalk, which also tends to prevent transatlantic end-to-end signalling from working. DTMF is much more common in France -- there are even DTMF payphones in a few rare places. In Germany, there is no DTMF in the public network, but essentially all PBXs use DTMF. /john