Verilink QUAD T1 (880-503345-001) Product Manual - Manual (Page 46)

Diagnostics and Alarms
5-4 Verilink QUAD T1 User Manual
Figure 5-2 QUAD T1 Loopbacks
Troubleshooting Table 5-2 provides information for troubleshooting a T1 during the
installation process or in response to trouble reports after a circuit
is placed into service.
DTE DTE
Payload
Loop
DTE DTE
Remote
CSU
Remote
CSU
Line
Loop
AIS
Local
Quad T1
Local
Quad T1
DTE DTE
Local
Loop
DTE DTE
Far End
LLB
DTE DTE
Far End
PLB
Local
Quad T1
Local
Quad T1
Local
Quad T1
Remote
CSU
Remote
CSU
Remote
CSU
X
X
X