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Siemens GSM-R Cab Radio » History » Version 5

laforge, 01/23/2023 06:39 PM

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h1. Siemens GSM-R CAB Radio
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Osmocom has been provided with two ancient Siemens GSM CAB Radio devices, i.e. the kind of MS installed fixed into a train engine.
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h2. Sub-Rack Hardware
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h3. Backplane
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At the back of the sub-rack there's a custom back-plane to interconnect the various modules
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h3. High Voltage Power Supply Module
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This is a fully encapsulated, passive cooled, DC/DC converter with
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* Input voltage 65..150V
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* Two output voltage rails of 12V / 4A
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h3. 12V -> 5V DC/DC converter Module
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This is a circuit board that generates a 5V rail from 12V
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h3. GSM Modem Module
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This is a module implementing the actual GSM-R modem. It consts of two circuit boards: One digital and one analog/RF.
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h4. Digital Board
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h4. RF Board
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h3. PC/104 embedded PC Module
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This is a carrier board hosting a PC/104 embedded x86 Mainboard.
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h4. Carrier
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h4. PC/104 x86 SBC
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h3. I/O board
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This is a board that brings signals from the backplane and frontplane and brings them to connectors towards the main connector panel.
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h2. Handset Hardware
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h2. Connector pinout
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h3. EXT RADIO (DB-15 female)
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h3. SER I/O (DB-25 male)
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h3. HMI 1 (DB-25 female)
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h3. HMI 2 (DB-25 female)
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h3. MVB OUT (DB-9 female)
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h3. MVB IN (DB-9 female)
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h3. ANT (N)
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This  a standdard 50-ohms N-type conector to connect to the GSM-R antenna.
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h3. PMU (DB-9 male)
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This connector is forwarded internally to the DB-9 connector on the front of the embedded PC. Probably serial console.
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h3. TRAIN POWER AND I/O (circular connector)
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|_.Pin (ext)|_.Internal Connector|_.Internal Connector Pin|_.Wire color|_.Purpose|
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|H|PL6|1|rose||
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|K|PL6|2|white||
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|M|PL6|3|green||
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|P|PL6|4|purple||
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|S|PL6|5|blue||
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|J|PL6|6|black||
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|L|PL6|7|red||
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|N|PL6|8|yellow||
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|R|PL6|9|orange||
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|B|PL6|10|green||
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|T|PL7|1|white||
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|d|PL7|2|green||
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|F|PL7|4|blue||
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|A|PL7|5|red||
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|U|PL7|6|rose||
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|e|PL7|7|blue||
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|G|PL7|9|grey||
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|C|PL7|10|yellow||
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|V|PL8|1|white||
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|D|PL8|3|purple||
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|W|PL8|4|red||
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|E|PL8|6|orange||
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|c|PL9|1|orange||
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|Z|PL9|2|rose||
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|X|PL9|3|green||
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|b|PL9|4|grey||
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|a|PL9|5|red||
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|Y|PL9|6|yellow||
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