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Hello

I am looking for someone who can design for me a circuit that can change DTMF caller ID signal to FSK (bellcore), the idea that I found some products that have 1,2,4 ports only in my case I need more I need a box start with 4,8,12 lines.

Any one who is interested and can do it I can make a deal with him

If you cannot do it can you please refer me to company or person will be also appreciated  

 

Thanks