Reference Guide
IMACS System Release 5.1.9
8-9
System Testing and Diagnostics
Benefits of Built-In Diagnostics
In Figure 8-1, diagnostics 4, the T1 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 T1 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 8-2, diagnostics 8.
Figure 8-1. 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
T1
T1
Cross-
Connect
Element
OCU/
DP
T1 Facility
DDS Facility
CSU/DSU
Cross-
Connect
Element
HSU
T1
T1
Cross-
Connect
Element
OCU/
DP
T1 Facility
DDS Facility
CSU/DSU
Cross-
Connect
Element
HSU
T1
T1
Cross-
Connect
Element
OCU/
DP
T1 Facility
DDS Facility
CSU/DSU
Cross-
Connect
Element
HSU
T1
T1
Cross-
Connect
Element
OCU/
DP
T1 Facility
Diagnostics 1
Diagnostics 2
Diagnostics 3
Diagnostics 4
DDS Facility
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