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GRU Group Switch card

Manufacturer Ericsson
Product SKU:  ROF131674/1
Group Switch Receiver Unit. Refurbished
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Functionally, the GRU circuit board is divided into two identical halves, each half receiving the time slots (data) from the time switch (GSU2) over a parallel bus. The data is converted into serial form and sent in bursts over 16 different lines to 16 different GJUG4s.

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