• Table of contents
• Sagem OPS 940
  • Internal pictures
    • UI board
    • Mainboard
    • Battery + Antenna board
    • Battery
    • Battery internal circuit boards
  • Replacement batteries

Sagem OPS 940¶

The Sagem OPS 940 is a GSM-R handset produced by the french manufacturer Sagem. It was used at Deutsche Bahn, the German railway company. The product had to be discontinued in 2006 due to it not being RoHS compliant.

Internal pictures¶

UI board¶

The UI board has Display and Keypad attached to it. It connects to the mainboard via a FPC connector. It (naturally) is located topmost above the mainboard in the overall stack.

Mainboard¶

The mainboard was taken from another phone (maybe the GPH?). It is based around a Ti chipset (HERCROM200 / F741529AGHH + TWL3012 - most likely predecessors of the TI_Calypso_Chipset we know from OsmocomBB

The mainboard is placed into some kind of plastic holder. You can see the unused push button areas underneath it

Battery + Antenna board¶

This is the lowest board of the sandwich/stack in the unit. It connects to the battery contacts of the mainboard and connects them with the actual battery contacts.

Battery¶

Battery internal circuit boards¶

Replacement batteries¶

after starting to manually re-building battery packs, laforge discovered that replacement batteries can still be found in the market (even in 2023) when searching for the following keywords:

• RSAG940
• DB SAP Nr. 940148