Answer Posted / santosh sahani

as per the question trx-short form of transeiver comprise of two words.
trans & receiver-i:e it transmits & receives radio signals.n does neceesry function needed to be done before the singals send to Abis interface..n vice versa..
As per the second question DVxx stands for Duplexer..to b able to transmit n recive using same antenna we need duplexer[as in radars]..the next letter'J" stands for 900mhz freq band usage n is comoany specifc..for 18oo band usage it will b DVDX...

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