Answer:
3. ISDN
Explanation:
ISDN ( Integrated Services Digital Network ) -
It is the used for the simultaneous digital transmission of network service , data , video and voice , instead of the old circuits of the public switched telephone network ( PSTN ) , is referred to as ISDN .
The characteristic feature of ISDN is that it integrates the data and speech on the same lines , which is not possible in PSTN .
Hence, from the given information of the question,
The correct option is ISDN .
The solution which enables simultaneous digital transmission of voice, video, data, and other network services over a PSTN is:
According to the given question, we are asked to show the solution which enables simultaneous digital transmission of voice, video, data, and other network services over a PSTN
As a result of this, we can see that the solution which allows for simultaneous digital transmission of voice, video, data, and other network services over a PSTN is an Integrated Services Digital Network
This is because the ISDN is able to perform what the PSTN cannot do and that is to properly integrate the data on the same lines over a network.
Therefore, the correct answer is option C
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