Question

My 1st Question⤵️⤵️⤵️⤵️

Which type of ISDN is used for big data transfer???

Answer 1

ISDN is a circuit-switched telephone network system, which also provides access to packet switched networks, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in potentially better voice quality than an analog phone can provide.

Answer 2

Primary Rate ISDN (PRI)

PRI depends on the country but a typical PRI is 23 bearer (B) channels at 64 Kbps for data and 1 D channel at 64 Kbps. This is known as 23B+1D.

I think it is right