Question

Which of the following solutions enables simultaneous digital transmission of voice, video, data, and other network services over a PSTN?1) WiMAX
2) PoE
3) ISDN
4) HSPA+

Answer 1

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 .