Specifications

12-6 Diagnostics
Model No.
Running Head
Benefits of Built-In Diagnostics System Testing and Diagnostics
In Figure 12-1, diagnostics 4, the E1 link of the remote Integrated Access System is
configured in Line Loopback. Alternatively, a loop up code can be sent from the local
Integrated Access System to put the E1 link of the remote Integrated Access System in Line
loopback. This process is repeated until the remote DTE is put in network loopback and tested
as shown in Figure 12-2, diagnostics 8.
Figure 12-1.Built-In Diagnostics Example (Diagnostics 1 - 4)
Local
DTE
v.35
Remote
DTE
v.35
Local
DTE
v.35
Remote
DTE
v.35
Local
DTE
v.35
Remote
DTE
v.35
Local
DTE
v.35
Remote
DTE
v.35
CSU/DSU
Cross-
Connect
Element
HSU E1 E1
Cross-
Connect
Element
HSU
E1 Facility DDS Facility
CSU/DSU
Cross-
Connect
Element
HSU E1 E1
Cross-
Connect
Element
HSU
E1 Facility DDS Facility
CSU/DSU
Cross-
Connect
Element
HSU E1 E1
Cross-
Connect
Element
HSU
E1 Facility DDS Facility
CSU/DSU
Cross-
Connect
Element
HSU E1 E1
Cross-
Connect
Element
HSU
E1 Facility
Diagnostics 1
Diagnostics 2
Diagnostics 3
Diagnostics 4
DDS Facility