dial tone generate

interfacing dsc alarm using contact-id

hii´m working on a interface to a dsc alarm using the contac-id protocol. i need to emulate a telephone line and generate dial-tone and handshake signals. i have a prototype working, but sometimes the alarm misses the signals.the line emulation is do...
Hobby Circuits and Small Projects Problems :: 31 Jan 2008 12:11 :: etolocka :: Replies: 2 :: Views: 555

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house alarm systems and the fixed phone line

e of an alarm event the system can notify the company which provides the service of guarding the object. i am interested if the phone interface inside of systems like this is a real analog modem on a dialup line(pots) or the communication used in sys...
Professional Hardware and Electronics Design :: 16 May 2005 6:36 :: najam696 :: Replies: 28 :: Views: 7666

dial tone generator

i have this device that only works if it is connected to the phone jack and hears a dial tone.on my pc i have a program that generate the dial tone but how would i go about connecting this device to my pc so that it hears the fake dial tone?...
Hobby Circuits and Small Projects Problems :: 12 Sep 2004 9:29 :: mhamed :: Replies: 13 :: Views: 1983

simulation of pstn switch interface

dear all,i am going to make a simulation kit for the telephone line subscriber interface from the pstn switch side and i need to generate the dial tone and -48 vdc using a simple design .. any suggestions ..?regardsmeshmesh...
Professional Hardware and Electronics Design :: 29 Dec 2003 9:18 :: meshmesh :: Replies: 0 :: Views: 216

slics

can some suggest good slic ics ?...
Professional Hardware and Electronics Design :: 17 Nov 2003 19:41 :: digidot :: Replies: 7 :: Views: 804

how to generate a telephone dial tone in europe

hi, is there an integrated circuit capable of generating a telephone dial tone which is ussually generated by the telephone switch itself. what would be the timing sequence of the dial tone, not the continuos tone like in america. is the ...
Professional Hardware and Electronics Design :: 05 Jun 2003 12:07 :: papyaki :: Replies: 1 :: Views: 340

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