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Wireless Mobile Communications
Wireless Fixed Telephone Networks
Q
The technique for separate but parallel signalling channel is called ________
AA. Common channel signalling
BB. Forward channel signalling
CC. Reverse channel signalling
DD. Separate channel signalling
Correct Answer:
A. A. Common channel signalling
Explanation:
During the mid 1980s, the PSTN was transformed into two parallel networks- one dedicated to user traffic, and one dedicated to call signalling traffic. This technique is called common channel signalling.
