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List of Error messages Troubleshooting
6
Cause Code Description Event
1853
1854 NCS is rejecting the call because the MES
is outside the spot beam coverage area
1855 Call rejected, preemption failed, no
channel available
1856 Call rejected, spot beam selection failed
18A1 Bearer
capability not
authorized
NCS is rejecting the call because the
specified MES ID was not found in the
"Forward and Return MES ID" cross-
reference table
18A2 NCS is rejecting the call because the MES
is outside the spot beam coverage area
18A3 NCS is rejecting the call because the
specified LES is not authorized for the
requested service at the NCS
18B1 Interworking,
unspecified
NCS is rejecting or clearing the call for a
reason which is not covered by any of the
currently defined "Cause" events
18B2
18C1 Subscriber
absent
NCS is rejecting the call because no
message was received from the specified
MES (in reaction to a Call Announcement
message) within the allowed time limit
18D1
May 2005 101