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telephony:ta1232_td816_td1232_hw_arch [2025/04/29 02:38] – [Caller Identification Card] prppedrotelephony:ta1232_td816_td1232_hw_arch [2025/04/29 02:40] (current) – external edit 127.0.0.1
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 However, for some reason my monkey brain can't process, Panasonic decided that this board, that was manufactured at least as early as 1994, wouldn't be supported by KX-TD system until later revisions, late in the 90's. This is weird. This is wasteful. But it's also how capitalism works, some would say.  However, for some reason my monkey brain can't process, Panasonic decided that this board, that was manufactured at least as early as 1994, wouldn't be supported by KX-TD system until later revisions, late in the 90's. This is weird. This is wasteful. But it's also how capitalism works, some would say. 
  
-So, as currently, I'm fighting capitalism in a infinitesimal scale: a ridiculously pointless exercise to reverse engineer those boards and understand how different they are. I am, however, a salaryman, and also a lot of other alter egos, each trying to fight for my already limited time, so I can't promise anything. Somebody once told me ~the world is gonna roll me~ we have to under-promise and over-deliver. Here we over-promise and under-deliver. Get used to it. +So, as currently, I'm fighting capitalism in a infinitesimal scale: a ridiculously pointless exercise to reverse engineer those boards and understand how different they are. I am, however, a salaryman, and also a lot of other alter egos, each trying to fight for my already limited time, so I can't promise anything. Somebody once told me <del>the world is gonna roll me</del> we have to under-promise and over-deliver. Here we over-promise and under-deliver. Get used to it. 
  
 **Anyway**, the first thing to note is that half of the board does basically the same thing: we still got four FSK modems and two serial-to-parallel converter IC's. According to the TA123293's schematic(({{ :telephony:43_00_13.pdf |}})), the DTMF IC is connected in parallel, completely independent to the FSK processing circuitry from the TIP and RING to the the addressing/data lines. So it's really two cards in one.  **Anyway**, the first thing to note is that half of the board does basically the same thing: we still got four FSK modems and two serial-to-parallel converter IC's. According to the TA123293's schematic(({{ :telephony:43_00_13.pdf |}})), the DTMF IC is connected in parallel, completely independent to the FSK processing circuitry from the TIP and RING to the the addressing/data lines. So it's really two cards in one. 
  
-Though I haven't thus far been able to track down any schematics for KX-TD193(X), it seems that the addressing circuitry differs quite a bit from what we have on the DX/123293 version. +Though I haven't thus far been able to track down any schematics for KX-TD193(X) (at least not for a price I'm prepared to pay, i.e. > $0), it seems that the addressing circuitry differs quite a bit from what we have on the DX/123293 version. 
  
 FIXME FIXME
telephony/ta1232_td816_td1232_hw_arch.1745905093.txt.gz · Last modified: 2025/04/29 02:38 by prppedro

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