JAJZ801@CALSTATE.BITNET (Jeff Sicherman,CSU Long Beach) (06/27/90)
Does anyone know of a device, Radio Shack like or mail order, that can be attached to extension phones of a single-line home type system to indicate when the line is already in use, so that a handset is not picked-up while i'm on line with my modem. Please dont suggest getting a second line. Not acceptable at this time. Jeff Sicherman jajz801@calstate.bitnet
dcaulkins@cdp.UUCP (06/28/90)
I've seen some advertised in the $30 price range. I've a;lso designed and built some central-office-battery powered ones in which when the line is available a green LED is on; when the line is in use the light is out. Works for 2 - 4 users on one line. Dave C
gammal@altitude.CAM.ORG (Michael Gammal) (06/30/90)
JAJZ801@CALSTATE.BITNET (Jeff Sicherman,CSU Long Beach) writes: > Does anyone know of a device, Radio Shack like or mail order, >that can be attached to extension phones of a single-line home >type system to indicate when the line is already in use, so that >a handset is not picked-up while i'm on line with my modem. >Please dont suggest getting a second line. Not acceptable at this >time. >Jeff Sicherman >jajz801@calstate.bitnet There used to be a device that you would connect to the phone line and if the phone was off hook a red light (a mini-light bulb) would turn on. I don't remember where it could be purchased, but I think it would react to the voltage of the phone line or something like that. Anyways good luck in your search! Chow! -- Michael Gammal Apple //e & Atari Enthusiast Dawson College gammal@altitude.CAM.ORG qp qp qp qp qp qp qp Montreal, Que. db Support Nature db Canada
greg@gagme.chi.il.us (Gregory Gulik) (07/05/90)
JAJZ801@CALSTATE.BITNET (Jeff Sicherman,CSU Long Beach) writes: > > Does anyone know of a device, Radio Shack like or mail order, >that can be attached to extension phones of a single-line home >type system to indicate when the line is already in use, so that >a handset is not picked-up while i'm on line with my modem. > I just picked up this little gadget from Radio Shack yesterday which sounds like it would help you more than a little light. It is called the DuoPhone TeleProtector and cost me $7.95 Basically, it is supposed to be used on an answering machine that you want to kill when you pick up another line. I used it for the opposite reason. I have it on another line in the house, and when the modem is being used, that line is completely dead! So, just go to Radio Shack, and read the package, it might suit your purpose. -greg -- Gregory A. Gulik Call Gagme, a public greg@gagme.chi.il.us || ...!gagme!greg access UNIX system at || gulik@depaul.edu (708) 318-7133
marka@dsinet (elroy) (07/11/90)
In article <9006270705.AA09386@ucbvax.Berkeley.EDU>, JAJZ801@CALSTATE.BITNET (Jeff Sicherman,CSU Long Beach) writes: > > Does anyone know of a device, Radio Shack like or mail order, > that can be attached to extension phones of a single-line home > type system to indicate when the line is already in use, so that > a handset is not picked-up while i'm on line with my modem. The December 1989 issue of Popular Electronics has a simple circuit (a triac, a diode, and a resistor) that will act as a cut-off device. You place one of thses devices on each phone line, and the first phone to get picked up gets exclusive access to the line. All the extensions are cut off until the first phone is hung up. It's simple, cheap, and doesn't require re-wiring the phones. -- Mark Anacker ...!dsinet!marka -or- ...!toybox!msa Digital Systems International, Inc. Redmond, WA USA (206) 881-7544