These cards were being used by an Indian customer as the part of their communications system. But the OEM who had supplied the cards stopped providing the spares / technical support. Since these cards were part of a system which is still actively used by them, they approached us if any card-to card replacement solutions can be found. Since no technical data / information about the cards were available, we had to take up a total reverse engineering of the cards from scratch, identifying each & every component, each connection etc. The mapping of the connectivity was completed and the circuit schematic diagram was prepared for each card. Since the components used on the cards were all obsolete now, the existing components were replaced with functionally equivalent components, which are in active production & hence availability is assured for many years from now. This was essential keeping in mind that these cards had to be maintained for several years in future. Total re-design & optimization of the cards was carried out, at the same time maintaining the existing external interfaces and the board mechanicals such as dimensions and interface connectors. The cards were tested thoroughly for the functionality in the system and found to be working the same as the earlier card. |