A T1 line has lost connectivity to the ISP. The ISP has instructed the technician to place a loopback on a device connecting the T1 line to their central office. On which of the following devices will the technician implement the loopback?
A. Channel remote module
B. Digital subscriber line modem
C. Fiber optic modem
D. Channel service unit
Answer:D
A T1 line has lost connectivity to the ISP. The ISP has instructed the technician to place a loopback on a device connecting the T1 line to their central office. On which of the following devices will the technician implement the loopback?
A. Channel remote module B. Digital subscriber line modem C. Fiber optic modem D. Channel service unit
Explanation: Explanation/Reference: