BildTel 001 » History » Version 9
laforge, 10/29/2023 08:26 PM
| 1 | 9 | laforge | {{>toc}} |
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| 3 | 1 | laforge | h1. BildTel 001 |
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| 5 | 3 | laforge | The Telekom-branded *BildTel 001* was likely the first commercially available ISDN video phone in Germany. |
| 6 | 1 | laforge | |
| 7 | 3 | laforge | {{thumbnail(20231028_114259.jpg,size=400)}} |
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| 9 | 1 | laforge | |
| 10 | 9 | laforge | {{thumbnail(isdn-bildtelefon-picture-alliance-zb-matthias-hiekel-11764519.jpg,size=400)}} |
| 11 | (Only digital marketing picture I could find online, courtesy of Picture Allianze / Matthias Hiekel) |
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| 13 | 1 | laforge | h2. Architecture |
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| 15 | The system consists of the following parts: |
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| 16 | 2 | laforge | * A TV screen with built-in [[BTX__Prestel__Videotex__Minitel|BTX]] decoder (inherited from [[LOEWE_Multitel_TV10]]) |
| 17 | 1 | laforge | * A keyboard + phone-receiver combo (inherited from [[LOEWE_Multitel_TV10]]) |
| 18 | * A _desktop-computer-like_ box called the Codec (containing the actual ISDN video telephony part, implemented by AEG/OLYMPIA) |
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| 19 | * A video camera |
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| 20 | |||
| 21 | The BTX Terminal [[LOEWE_Multitel_TV10]] was used as the "user interface" for the device, adding the _codec_ box to turn it into a video phone. |
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| 23 | 4 | laforge | h4. Codec unit |
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| 25 | {{thumbnail(20231028_114437.jpg,size=400)}} |
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| 26 | 6 | laforge | {{thumbnail(20231028_120250.jpg,size=400)}} |
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| 31 | 4 | laforge | |
| 32 | h4. TV Camera |
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| 33 | |||
| 34 | {{thumbnail(20231028_115010.jpg,size=400)}} |
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| 35 | |||
| 36 | h4. TV Unit |
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| 38 | {{thumbnail(20231028_114503.jpg,size=400)}} |
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| 39 | 7 | laforge | {{thumbnail(20231028_132851.jpg,size=400)}} |
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| 45 | 4 | laforge | |
| 46 | h4. Keyboard/receiver unit |
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| 47 | |||
| 48 | {{thumbnail(20231028_114558.jpg,size=400)}} |
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| 53 | 5 | laforge | {{thumbnail(20231028_142246.jpg)}} |
| 54 | {{thumbnail(20231028_142251.jpg)}} |
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| 55 | 4 | laforge | |
| 56 | 9 | laforge | Actual Cherry keyboard PCBA after full disassembly, ultrasonic cleaning of all keycaps and lots of isopropanol on the PCB, removing what might be decades old coke residue: |
| 57 | {{thumbnail(20231029_093033.jpg,size=400)}} |
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| 59 | 1 | laforge | h3. Connections |
| 60 | |||
| 61 | h4. Codec unit |
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| 62 | |||
| 63 | * connects to ISDN basic-rate S0 interface using 8P8C/RJ45 plug |
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| 64 | * has two proprietary connectors for attaching video cameras |
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| 65 | * has two SCART connectors (one for audio/video output to the TV) |
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| 66 | * has a TAE jack for attaching an analog phone for the audio port (connected to the combined keyboard/receiver unit by default) |
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| 67 | * has another TAE jack (purpose unknown) |
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| 68 | * has a V.24 interface on a SUB-D 9 connector which connects to the built-in BTX decoder of the TV unit |
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| 69 | |||
| 70 | h4. TV Camera |
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| 71 | |||
| 72 | * connects to the Codec unit using a proprietary high-density connector that appears to carry both video and power |
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| 73 | |||
| 74 | h4. TV unit |
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| 75 | |||
| 76 | * has an RF input for TV broadcast signals (PAL) |
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| 77 | * has a SCART input for baseband audio/video from peripherals (like the Codec unit) |
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| 78 | * has a DIN speaker output for attaching an external speaker |
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| 79 | * has a built-in BTX decoder with |
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| 80 | ** an unused DIN port intended to connect to the [[DBT-03]] BTX-Modem (not used in the ISDN video application) |
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| 81 | ** an unused centronics port |
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| 82 | ** an auxiliary V.24 port on a DIN connector interfacing the SUB-D 9 of the Codec unit |
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| 83 | |||
| 84 | h4. Keyboard/receiver unit |
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| 85 | |||
| 86 | * has a cable with TAE connector attached (connects to codec unit) |
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| 87 | 9 | laforge | |
| 88 | h2. Further Reading |
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| 89 | |||
| 90 | * "Thread on the fediverse covering the BildTel 001":https://chaos.social/@LaF0rge/111317641831468838 |
