I AM WORKING ON PRIVATE BRANCH EXCHANGE AND AM BLOCKED WITH MY WORK DUE TO UN AVAILABILITY OF 2 IC'S IN MY AREA.
PLZ HELP ME OUT BY TELLING ANY ALTERNATIVE FOR THESE:

IC'S ARE

1) LCA110 (HOOK SWITCH)

2) L9711 (RING DETECTOR)

DETAILS CAN BE SEEN ON THIS LINK

http://www.kmitl.ac.th/~kswichit/PABx/PABx.htm

 

Since we don't know where you are, finding a supply of them far away from you probably won't help you very much.

 

i live in pakistan. i need to know any alternative for these IC's

 

1) LCA110 (HOOK SWITCH)

2) L9711 (RING DETECTOR)

For the hook switch it is an opto TRIAC. You can use MOC3021 for it.

The ring detector is a simple opto-isolator, 4N26 or any similar opto-isolator will work well.

 

This may not help you much, but Mouser shows some cross-reference matches for the LCA110, which are solid-state relays:
http://www.mouser.com/Search/Refine.aspx?Keyword=LCA110
G3VM-351B - Omron Electronics
LH1546AT - Vishay
Datasheets are available from the link above.

This schematic:
http://www.kmitl.ac.th/~kswichit/PABx/Download/PABx.pdf
indicates that the L9711 is some kind of optocoupler.
A Motorola MITL117 appears to have a compatible pinout.
So do Fairchild's 4N2x, 4N3x and H11Ax series optocouplers; they are all shown in the 4N25 datasheet.

Not knowing what voltages to expect in your circuit, I'll leave it to you to figure out which may be suitable.

 

i need the schemetic of "wireless switch" and i too want to confirm that when i connect it with my PBX through RJ11 so what additional things i have to do to make it work with it wirelessly.