Ericsson CMS 881 RTS Rack

This is the Ericsson RBS881 for TACS, 1 channel per rack

CMS 8800 (AMPS) CMS 8810 ( TACS)

The next generation was for ETACS was RBS883

This rack would be installed in a Vodafone Base station,and is at the heart of communications with the TACS mobile phone.

The Rack can be broken down into 3 main sections.

1)Far right - The Power supply plug in unit (RCP)

This converts 24v DC into 5v,12v,-12v and -24v for the analog, digital and RF circuitry

2)Right of Centre - The Control Unit (Cu)

This is a mini rack that sits in the main rack, and contains 6 PCBs and its own back plane

3) The RF,IF and AF Plug in Units

Some Part Numbers