Path: utzoo!attcan!uunet!know!sdd.hp.com!ucsd!ucbvax!ucdavis!uop!quack!mrapple From: mrapple@quack.sac.ca.us (Nick Sayer) Newsgroups: comp.dcom.modems Subject: Re: Modems with cellular telephones Message-ID: Date: 28 Oct 90 21:42:57 GMT References: <9010262354.AA04244@alw.nih.gov> Organization: The Duck Pond, Stockton, CA Lines: 44 RAF@CU.NIH.GOV ("Roger Fajman") writes: >I got no response to this on Telecom Digest, so I thought I would try >Info-Modems Digest. >Some people here would like to use a laptop PC and modem with a celluar >telephone for the purpose of giving demonstrations in various locations >where a modular jack may not be available. Can anyone recommend >cellular telephones and adapters for this purpose? If you don't mind doing a little "dirty work," there is a product called "Celjack" that aparently works by hooking some wires to the speaker, mic and keypad on your cell phone. It is a circuit board with a standard RJ11 jack, two wires bearing 12VDC, a switch (presumably power), some LEDs, and what looks like a DB-15 or something to hook up the wires from the cell phone. It aparently waits for the RJ11 jack to go "off hook," provides a phony dial tone, translates DTMF or pulse into keypad closures, closes "send" momentarily a couple seconds after the last DTMF, and finally, pushes "end" on hang-up. The only thing I don't think it can do is handle ringing. Apart from that, the only way you can tell it apart from a real phone line is that it takes longer for your dialed number to ring (about 7 seconds or so), and of course, if you're moving, it may suffer the normal cellular fading and switching sort of stuff. The product is reviewed/described in this November's "73" magazine, and is intended for Amateur Radio autopatch (remote phone patch) equipment running on far away hilltops. Telular, Inc. 1215 Washington Ave. Wilmette, IL, 60091-2566 (708) 256-8000 Suggested list price $480 Disclaimer: I don't have anything to do with these people, I just read the review. -- Nick Sayer | Disclaimer: "Don't try this at home, | RIP: Mel Blanc mrapple@quack.sac.ca.us | kids. This should only be done by | 1908-1989 N6QQQ [44.2.1.17] | trained, professional idiots." | May he never 209-952-5347 (Telebit) | --Plucky Duck | be silenced.