Ericsson CMS 88 RTS Rack

Ericsson RBS881 for TACS. The ETACS was RBS883
 CMS 8800 (AMPS) CMS 8810 ( TACS)
TACS Air Interface BTS equipment


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)
RCP Rack Power SupplyThis 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


Ericsson TACS Control unit
TACS Control Unit with front panel removed







Control Unit Cards with case removed






Part numbers of CU cards

3) The RF,IF and AF Plug in Units



Some Part Numbers

rackRR-202698
shelfRR-212500
RF BackplaneRR-212660
CPU BACKPLANERR-212655
RCPRR-202656POWER SUPPLY
CURR-202670Control Unit
EXRR-212520Exciter
FGTXRR-212616
AFRR-212518Line interface
DURR-212684Diversity
IFRR-212516IF
RFRR-212514
FGRXRR-212512




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