Chapter 6: Troubleshooting
196 SDU errors
Network busy 1 3 5 1 C-Channel continuity test failure at
GES/AES not responding/
Incomplete call information received
from AES/
Interruption in received AES carrier/
Connect acknowledge not received
by GES
NoAnswer 0 1 1 2 Expiry of answer time supervision at
AES
NoAnswer 0 4 1 2 Expiry of answer time supervision at
the MSSC
NoChanAvail 1 3 2 1 C-channel frequency/power
unavailable at GES
NoUnitAvail 1 2 2 2 C-channel unit unavailable at AES
NoUnitAvail 1 3 2 2 C-channel unit unavailable at GES
SatDestFail 1 1 4 1 Called AES terminal not in service
ServiceType 1 3 6 5 Service type not supported by GES
SwitchBusy 0 2 2 10 GES equipment congestion
SwitchBusy 0 4 2 10 GES equipment congestion/
No route to destination from GES/
Circuit to terrestrial network
unavailable
UnassignedNo 1 4 7 2 AES not authorized for service
Unauthorised 1 3 4 2 Calling AES not authorized for
service
UserBusy 1 1 7 1 Called AES terminal busy
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