What is handshaking in modems for?

[hm_fa_da]

hi all ,


what is handshaking in modems for ? when two modems want to connect together , they send some codes like 010101.... and ... , what is this handshaking for ? and can we not do it and after connection is established , start to send data without handshaking ( using modem ICs ) ?


Regards.

 

[DarkJedi]

Re: Modems handshaking

hi hm_fa_da,

Handshaking is to configure the data transfer rate, the signaling, like how many data bits are going to be send, what kind of parity is going to be used, basically for those parameters. It is important because during the handshaking both modems set their parameters to the same values, that way they can understand what the other is sending.

You can have comunication between two IC's and do not use handshake, but u must set the parameters described above because if you don't... well you won't know if the bit sent is a stop bit or a data bit, or the duration of a bit won't be the same for both IC's so you won't rewally tranfer any usable data between them.

Hope it helps.