Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!netsys!vector!telecom-gateway From: westmark!dave@rutgers.edu (Dave Levenson) Newsgroups: comp.dcom.telecom Subject: Re: The Tone Which Announces Request for Card Number Message-ID: Date: 1 Aug 89 04:21:58 GMT Sender: news@vector.Dallas.TX.US Organization: Westmark, Inc., Warren, NJ, USA Lines: 23 Approved: telecom-request@vector.dallas.tx.us X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@vector.dallas.tx.us X-TELECOM-Digest: volume 9, issue 270, message 10 of 11 In article , 89.KREMEN@gsb-how. stanford.edu (The Arb) writes: > I am wondering about the "special tone" that one hears when > making a telephone credit card call using AT&T. Does anyone out know > at what frequency the tone is or is there even a standard? The tone that prompts the caller for the Calling Card number is the MCCS (mechanized calling card service) logo tone. It is usually called BONG. It consists of approximately 50 milliseconds of the touch-tone # symbol (two tones) followed by a frequency and amplitude shift that makes it appear to fade away. The # is used because the calling party may be using a tone phone behind a pulse PBX with a tone-to-pulse converter. Many such converters are disabled by the #, thus allowing the subscriber to dial the card number with touch-tones, and avoid having them translated into dial pulse. -- Dave Levenson Voice: (201) 647 0900 Westmark, Inc. Internet: dave@westmark.uu.net Warren, NJ, USA UUCP: {uunet | rutgers | att}!westmark!dave [The Man in the Mooney] AT&T Mail: !westmark!dave