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Which of the following has the function to accept information from PSTN?

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Which of the following has the function to accept information from PSTN?

(a) TIU

(b) WIU

(c) BIU

(d) CIU

The question was posed to me in a job interview.

I need to ask this question from Personal Communication Services/Networks (PCS/PCNs) topic in chapter Wireless Networking of Wireless/Mobile

1 Answer

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Best answer
Right choice is (a) TIU

Easy explanation: The function of TIU (Trunk interface unit) is to accept information from the PSTN. TIU acts as the physical layer and transforms the standard format of the PSTN into the wireless access physical layer.

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