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which part is important to u.. if u just need to make a conn:, ATDT to modem will do, or else u need relays and dtmf encoder ..epilot said:Hi there
I want to build a system that could make a dial up connection with another phone or mobile phone at another place when it sense a event..
Can anyone help me with any suggestion or direct me for a useful link?
Thanks
akg said:so u need a dialling ckt from scratch.. r u intend to use PC in ur project..
case 1: if u use pc , and just need to dial a number , send atdt# (#is the number) to a modem, it will dial
case 2: ur usig a pc , but with no modem. u need a dmf encoder and a relay to make the off-hook condition(low resistance loop) and then send a seq: of bcd to the encoder from PC to dial.
case 3: u have no pc , no modem.. then u alteast need a micro: to provide timing , so that the digits be synchonously send to the encoder
which part describes ur need best.?
Hi Len,ljcox said:Have you done an internet search for "phone dialler"? (or "phone dialer" since some people mis-spell it)
You could also search this forum. Also try www.discovercircuits.com
"Dialer" is the American spelling, while "dialler" is Australian. Since the Trumpet Winsock was developed by an Australian company, Australian spellings have been used for the interface.