TMS-1000 PBX TelephoneSystem

Here’s a sample of a low cost commercial card cage.

We designed a TMS-1000 PBX Telephone System for installation and use in commercial office buildings. Unit requirement was that it had to be robust, highly reliable, quick to repair and modular due to the nature of industrial application.

The wall mounted was design divided into five major subassemblies; a wall mount bracket, card cage, power supply, PWB’s and removable outer cover. Low cost steel sheet metal construction was employed throughout, with card cage upper and lower guide plates using stamped, formed card guides and developed stiffing channels to support the large, heavy PWB’s. Unit was convection cooled with low temperature rise for high MTBF. The unit cost goal of $225 per unit was attained.