Figure 6-17. Payload And Dte Loopback Test; Figure 6-18. T1 Payload Loopback Test - ADTRAN T3SU 300 User Manual

DSX-1
Remote Port Payload Loopback
During this test, the local unit commands the far-end unit to
perform a payload loopback test for the selected Quad DSX-1
interface card. This results in all of the DSX-1 interfaces in the local
unit being looped back. See Figure 6-18 for an illustration of this
test.
61200217L1-1
T3SU 300
Quad DSX-1
DS3 MUX
Unit in Data Mode

Figure 6-17. Payload and DTE Loopback Test

T3SU 300
DS3 MUX T3
Far-end unit responds
to port loopback

Figure 6-18. T1 Payload Loopback Test

T3SU 300 User Manual
Chapter 6. Diagnostics
T3SU 300
Quad DSX-1
DS3 MUX
T3
Port in Payload
and DTE Loopback
T3SU 300
Quad DSX-1
DS3 MUX
Local port in Remote
Port Payload Loopback
DSX-1
DSX-1
6-13