hm_fa_da
Full Member level 5
hi all ;
can you help me find a complete document on how to use telephone line ??
i mean i want to design a public payphone and want to know more about answer pulse , during call pulse , and how much max mA can i use from line power ?....
thanks ...
can you help me find a complete document on how to use telephone line ??
i mean i want to design a public payphone and want to know more about answer pulse , during call pulse , and how much max mA can i use from line power ?....
thanks ...