BildTel 001 » History » Version 4
laforge, 10/28/2023 04:37 PM
| 1 | 1 | laforge | h1. BildTel 001 |
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| 2 | |||
| 3 | 3 | laforge | The Telekom-branded *BildTel 001* was likely the first commercially available ISDN video phone in Germany. |
| 4 | 1 | laforge | |
| 5 | 3 | laforge | {{thumbnail(20231028_114259.jpg,size=400)}} |
| 6 | {{thumbnail(20231028_114402.jpg,size=400)}} |
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| 7 | 1 | laforge | |
| 8 | h2. Architecture |
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| 9 | |||
| 10 | The system consists of the following parts: |
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| 11 | 2 | laforge | * A TV screen with built-in [[BTX__Prestel__Videotex__Minitel|BTX]] decoder (inherited from [[LOEWE_Multitel_TV10]]) |
| 12 | 1 | laforge | * A keyboard + phone-receiver combo (inherited from [[LOEWE_Multitel_TV10]]) |
| 13 | * A _desktop-computer-like_ box called the Codec (containing the actual ISDN video telephony part, implemented by AEG/OLYMPIA) |
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| 14 | * A video camera |
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| 15 | |||
| 16 | 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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| 18 | 4 | laforge | h4. Codec unit |
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| 20 | {{thumbnail(20231028_114437.jpg,size=400)}} |
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| 21 | |||
| 22 | h4. TV Camera |
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| 23 | |||
| 24 | {{thumbnail(20231028_115010.jpg,size=400)}} |
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| 25 | |||
| 26 | h4. TV Unit |
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| 27 | |||
| 28 | {{thumbnail(20231028_114503.jpg,size=400)}} |
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| 29 | |||
| 30 | h4. Keyboard/receiver unit |
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| 31 | |||
| 32 | {{thumbnail(20231028_114558.jpg,size=400)}} |
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| 33 | {{thumbnail(20231028_114639.jpg,size=400)}} |
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| 35 | {{thumbnail(20231028_141412.jpg)}} |
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| 36 | {{thumbnail(20231028_142128.jpg)}} |
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| 38 | 1 | laforge | h3. Connections |
| 39 | |||
| 40 | h4. Codec unit |
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| 41 | |||
| 42 | * connects to ISDN basic-rate S0 interface using 8P8C/RJ45 plug |
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| 43 | * has two proprietary connectors for attaching video cameras |
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| 44 | * has two SCART connectors (one for audio/video output to the TV) |
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| 45 | * 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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| 46 | * has another TAE jack (purpose unknown) |
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| 47 | * 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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| 48 | |||
| 49 | h4. TV Camera |
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| 50 | |||
| 51 | * connects to the Codec unit using a proprietary high-density connector that appears to carry both video and power |
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| 52 | |||
| 53 | h4. TV unit |
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| 54 | |||
| 55 | * has an RF input for TV broadcast signals (PAL) |
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| 56 | * has a SCART input for baseband audio/video from peripherals (like the Codec unit) |
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| 57 | * has a DIN speaker output for attaching an external speaker |
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| 58 | * has a built-in BTX decoder with |
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| 59 | ** an unused DIN port intended to connect to the [[DBT-03]] BTX-Modem (not used in the ISDN video application) |
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| 60 | ** an unused centronics port |
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| 61 | ** an auxiliary V.24 port on a DIN connector interfacing the SUB-D 9 of the Codec unit |
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| 62 | |||
| 63 | h4. Keyboard/receiver unit |
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| 64 | |||
| 65 | * has a cable with TAE connector attached (connects to codec unit) |
