Siemens GSM-R Cab Radio » History » Revision 7
Revision 6 (laforge, 01/23/2023 06:40 PM) → Revision 7/22 (laforge, 01/23/2023 06:42 PM)
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h1. Siemens GSM-R CAB Radio
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
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
This is a fully encapsulated, passive cooled, DC/DC converter with
* Input voltage 65..150V
* Two output voltage rails of 12V / 4A
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h3. 12V -> 5V DC/DC converter Module
This is a circuit board that generates a 5V rail from 12V
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h3. GSM Modem Module
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
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
This is a board that brings signals from the backplane and frontplane and brings them to connectors towards the main connector panel.
h2. Handset Hardware
h2. Connector pinout
h3. EXT RADIO (DB-15 female)
h3. SER I/O (DB-25 male)
h3. HMI 1 (DB-25 female)
h3. HMI 2 (DB-25 female)
h3. MVB OUT (DB-9 female)
h3. MVB IN (DB-9 female)
h3. ANT (N)
This a standdard 50-ohms N-type conector to connect to the GSM-R antenna.
h3. PMU (DB-9 male)
This connector is forwarded internally to the DB-9 connector on the front of the embedded PC. Probably serial console.
h3. TRAIN POWER AND I/O (circular connector)
|_.Pin (ext)|_.Internal Connector|_.Internal Connector Pin|_.Wire color|_.Purpose|
|H|PL6|1|rose||
|K|PL6|2|white||
|M|PL6|3|green||
|P|PL6|4|purple||
|S|PL6|5|blue||
|J|PL6|6|black||
|L|PL6|7|red||
|N|PL6|8|yellow||
|R|PL6|9|orange||
|B|PL6|10|green||
|T|PL7|1|white||
|d|PL7|2|green||
|F|PL7|4|blue||
|A|PL7|5|red||
|U|PL7|6|rose||
|e|PL7|7|blue||
|G|PL7|9|grey||
|C|PL7|10|yellow||
|V|PL8|1|white||
|D|PL8|3|purple||
|W|PL8|4|red||
|E|PL8|6|orange||
|c|PL9|1|orange||
|Z|PL9|2|rose||
|X|PL9|3|green||
|b|PL9|4|grey||
|a|PL9|5|red||
|Y|PL9|6|yellow||
