Question

___________ is a reverse link channel used by a subscriber unit to acknowledge.

(a) RACH

(b) AGCH

(c) DCCH

(d) PCH

This question was posed to me in an internship interview.

I would like to ask this question from GSM Channel Types in section Wireless Systems and Standards of Wireless/Mobile

Answer 1

The correct choice is (a) RACH

To explain: The RACH (Random Access Channel) is a reverse link channel used by a subscriber unit to acknowledge a page from the PCH. It is also used by mobiles to originate a call.