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| telephony:td816 [2026/04/01 15:53] – prppedro | telephony:td816 [2026/04/01 17:13] (current) – prppedro |
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| # Panasonic KX-TD816 PABX/PBX | # Panasonic KX-TD816 PABX/PBX (also KX-TD1232) |
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| I've bought this small PBX for my office. While not exactly _needed_, it can still be useful for a thing or two. This page compiles knowledge and information on this unit that I've been collecting around. | I've bought this small PBX for my office. While not exactly _needed_, it can still be useful for a thing or two. This page compiles knowledge and information on this unit that I've been collecting around. |
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| ## Alert: Rant incoming | Now, this is a fairly old unit, and a proprietary one at it. Not only information is hard to come by, as the old folks tend to be little protective of their knowledge. Sometimes I find people saying on the forums «I have it, but you have to get it directly from Panasonic» or even the infamous «Sent you via PM.» Some manuals, software and documents are terribly difficult to come by. There are even some old and suspect websites (like `diagrams.ua`) trying to sell schematics. |
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| As a strictly proprietary project, generally sold by Panasonic representatives, any very technical insights are pretty hard to come by. For some reason, folks that worked with this unit tend to withhold anything they have. People will either try to sell you this data or boast they have it in Sundance Communications. At best, you'll find a thread that ends in «sent you via PM.» | |
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| I, however, don't think even Panasonic would bother with anyone sharing schematics and software on a unit so old that the configuration software is written for MS-DOS. So, for the sake of open knowledge, I'll share what I find here, albeit it's not much. As I grow frustrated, I also got salty. Sorry, I can't avoid it. This article may be a little too rich on salt. | |
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| | Still, I managed to find some stuff, and I'm sharing it here, should someone want to run this old thing in the future. |
| # Nomenclatures | # Nomenclatures |
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| | *Term* | *Acronym meaning* | *Meaning* | | | *Term* | *Acronym meaning* | *Meaning* | |
| | IRNA | Intercept Routing — No Answer | | | | IRNA | Intercept Routing — No Answer | | |
| | | KSU | Key Service Unit | Another name for the PBX central box, fairly industry standard | |
| | PT/APT/DPT | [Analogue\Digital] Proprietary Telephone | A telephone set made specifically for those PABX's | | | PT/APT/DPT | [Analogue\Digital] Proprietary Telephone | A telephone set made specifically for those PABX's | |
| | SLT | Single Line Telephone | Any standard landline telephone | | | SLT | Single Line Telephone | Any standard landline telephone | |
| | XDP | eXtra Device Port | On certain models (all of them Digital), allows for a SLT to be connected to the analogue wiring, acting as a completely independent station | | | XDP | eXtra Device Port | On certain models (all of them Digital), allows for a SLT to be connected to the analogue wiring, acting as a completely independent station | |
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| ## My unit | ## My unit |
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| There's a service manual for the UK offering, KX-TD816E. But it's quite different from mine. While it obviously shares some design premises, it's quite different. The motherboard is completely different, the CPU board is in a different location and there's even stuff it got that mine doesn't, like dual pager and dual music source, as well as built-in door-phone card. | There's a service manual for the UK offering, KX-TD816E. But it's quite different from mine. While it obviously shares some design premises, it's quite different. The motherboard is completely different, the CPU board is in a different location and there's even stuff it got that mine doesn't, like dual pager and dual music source, as well as built-in door-phone card. |
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| | There are also service manuals for KX-TD1232E, CE, AL et al. and KX-TA1232. While the design is different both between bigger or smaller brothers (816 vs 1232) and between regional versions, the core design is more or less the same, as discussed at [[ta1232_td816_td1232_hw_arch|this page]] on that same Wiki. |
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| I'm compiling some information on the hardware [[td816bx_hardware|here]], but it is still a work in progress. | I'm compiling some information on the hardware [[td816bx_hardware|here]], but it is still a work in progress. |
| | {{:telephony:dsc_3619.jpg?200 |teste}} | | | {{:telephony:dsc_3619.jpg?200 |teste}} | |
| | My unit with a KX-T7230X DPT and a Intelbras SLT | | | My unit with a KX-T7230X DPT and a Intelbras SLT | |
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| ## Model suffixes | ## Model suffixes |
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| Both TD816 and it's bigger brother TD1232 got **a lot** of versions. Some are newer revisions, some are built for international markets. A friend of mine thinks it got to do with the wildly diverse world of telephonic systems, and it's probably true, but I live in Brazil, and, thus far, I've seen this `BX` unit, that, [according to the «British Telephones» website](https://www.britishtelephones.com/pana/kxtdecode.htm), is focused for the Asian market, and also a KX-TD1232 unit being [sold on OLX](https://sp.olx.com.br/sao-paulo-e-regiao/eletronicos-e-celulares/telefonia-fixa-e-sem-fio/panasonic-kx-td1232x-com-16slc-e-4co-1329602726?lis=listing_no_category) (as well in [another site](https://www.davicomtelecom.com.br/produto/kx-td-1232x-pabx-digital-panasonic-equipado-p-08-tr-a-e-16-r-h-acompanha-ap-propriet-rio-kxt-7533x-semi-novos/47446])), of the «X» variant. | Both TD816 and TD1232 got **a lot** of versions. Some are newer revisions, some are built for international markets. A friend of mine thinks it got to do with the wildly diverse world of telephonic systems, and it's probably true, but I live in Brazil, and, thus far, I've seen this `BX` unit, that, [according to the «British Telephones» website](https://www.britishtelephones.com/pana/kxtdecode.htm), is focused for the Asian market, and also a KX-TD1232 unit being [sold on OLX](https://sp.olx.com.br/sao-paulo-e-regiao/eletronicos-e-celulares/telefonia-fixa-e-sem-fio/panasonic-kx-td1232x-com-16slc-e-4co-1329602726?lis=listing_no_category) (as well in [another site](https://www.davicomtelecom.com.br/produto/kx-td-1232x-pabx-digital-panasonic-equipado-p-08-tr-a-e-16-r-h-acompanha-ap-propriet-rio-kxt-7533x-semi-novos/47446])), of the «X» variant. |
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| {{:telephony:t1232x_olx1.webp?200 |}} | {{:telephony:t1232x_olx1.webp?200 |}} |
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| As for Brazil, Googles returns **nothing** for TD816 with the `BR` suffix, and there's a [single result](https://fveletronica.webnode.com.br/products/kx-td1232br/) mentioning the `BR` variant for TD1232 model. If this model really exists, I don't envy the luck of someone who'll have to maintain it. The sellers of one of the add-ons I bought said he worked with a lot of «BR» models, specially the TD1232BR, since the price difference between the two units were, at the time, minimal. | As for Brazil, Googles returns **nothing** for TD816 with the `BR` suffix, and there's a [single result](https://fveletronica.webnode.com.br/products/kx-td1232br/) mentioning the `BR` variant for TD1232 model. If this model really exists, I don't envy the luck of someone who'll have to maintain it. The sellers of one of the add-ons I bought said he worked with a lot of «BR» models, specially the TD1232BR, since the price difference between the two units were, at the time, minimal. |
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| | KX-TD1232RU, for example, seems to be similar to TD1232CE and some of it's firmwares have Russian as the default language. My unit, which is a TD816BX got two languages: English (default) and French, which doesn't look very Asian market to me, but okay. TD816E, for the British market, is **wildly** different and also include some features onboard, like the doorphone adapter. |
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| ## Resources | ## Resources |
