Multiple choice

For digital lines, which device is used to establish the communications link between the customer equipment and the local loop?

  1. CSU/DSU

  2. Frame Relay switch

  3. ISDN switch

  4. modem

  5. PBX switch
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

CSU/DSU (Channel Service Unit/Data Service Unit) is the required device for digital lines like T1, E1, or T3. It connects customer equipment (router) to the local loop, performing signal conditioning, timing, and line termination functions that analog modems cannot provide for digital circuits.

Keep practicing — related questions