atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services Telephone Repairs & Equipment Old novelty phone dtmf conversions

I have a couple of old 80s novilty phones here.

One uses a UM9151-3 pulse dial chip (A micky mouse backpack phone), the other uses a lr40992 (generic flip open asian panda phone)

Is there any easy way of replacing these with a DTMF chip, as pulse dialing inst supported much these days. I would like to ideally get something that will just drop in, but I realize that I will have to have an oscillator etc for it, so am really looking for the easiest to hook up chip to hack in there.

The micky mouse phone looks to have a custom board for the NZ model, since the tone/pulse switch was re-purposed to be a ringer enable switch.

I am going out on a limb here, but I remember a company known as Majestic Electronics (I believe that they were located in Ohio) that worked with specialty phone repairs and modifications.

I also work a lot with a group known as Dumas Electronics in Fairfax, VA. They perform repairs of consumer-level products and might be worth contacting. I only have their telephone number which is 703-385-0111. The last option I can suggest is Tandy Service Center (the repair division of Radio Shack). Their local number is 703-550-0474. All information is in the United States. Sorry, but I don't have a web site for them, but maybe a phone call might point you in the right direction.

you might want to consider using a pulse to to tone converter instead of messing with the phones

I remember those panda phones , we used to sell them when we had the phone store

I was kind of hoping there would be a drop in replacement for tone dialing that I would be able to use. The pulse to tone converter would be a possibility, but I would really like to get these phones working this side of 1980, as I can see no reason to keep them operating with the origional dialing chip in them, its not like being pulse adds anything to the value of a button based phone.

If there is some form of cheap SIP based ATA that supports pulse dialing that would solve the problem the easy way, and I need to get another one anyway.