Path: utzoo!attcan!uunet!hayes!tnixon From: tnixon@hayes.uucp (Toby Nixon) Newsgroups: comp.dcom.modems Subject: Re: Disable Call Waiting Message-ID: <2868@hayes.uucp> Date: 12 Nov 90 13:16:27 GMT References: Organization: Hayes Microcomputer Products, Norcross, GA Lines: 40 In article , ralphs%halcyon.uucp@seattleu.edu writes: > If you get tired of dialing *70 or 1170 or whatever it takes to > disable your call-waiting (if it CAN get disabled in the first > place), feel free to hack on this (*nix users are on your own): > > [basic program omitted] The program posted simply sets S10 to 100 (ten seconds). Most modern comm programs allow you to include S-register setting commands directly in initialization strings. Also, most modems now allow you to store these values permanently in non-volatile memory (&W), so there's no need to set S10 before each call (or even after a modem reset). I must point out that in many telephone systems, the "call waiting beep" actually interrupts the signal in both directions on the line. Therefore, it is NOT sufficient to set S10 in only one of the modems; it must be set in BOTH of the modems. Not easy to do!! Also, the value "100" is extremely too high. The duration of the call waiting interruption is only about 800 milliseconds. To "ride it out", therefore, all you really need to do is be sure that the difference between the values in S9 and S10 is at least 8. Well, the default S9 value in Hayes modems is 6, and the default S10 is 14, which is exactly 8! So, sometimes the default settings ride out a call waiting beep (if the other end doesn't hang up), and sometimes they don't. But you don't need to set S10=100 (10 seconds); simply setting S10=16 should be sufficient to avoid disconnection on a call-waiting beep (if the other end doesn't disconnect first). -- Toby -- Toby Nixon, Principal Engineer | Voice +1-404-449-8791 Telex 151243420 Hayes Microcomputer Products Inc. | Fax +1-404-447-0178 CIS 70271,404 P.O. Box 105203 | UUCP uunet!hayes!tnixon AT&T !tnixon Atlanta, Georgia 30348 USA | Internet hayes!tnixon@uunet.uu.net