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List of Error messages Troubleshooting
6
Cause Code Description Event
request sequence number contained in the
received "notification acknowledge"
message (type BAH) is not valid (i.e.
either not ‘0’ or not the next value in the
sequence)
15D1 Message with
unrecognized
parameter,
discarded
LES is rejecting the call because the
"Channel Assignment" message received
from the NCS contains inappropriate or
conflicting information
15D2
CES → NCS
Signaling only.
LES is clearing this MES ID and channel
number in the busy lists at LES and NCS
because a new call to/from this MES is
being set-up (and thus any previous call
to/from this MES must have cleared)
15E1 Preemption -
circuit
reserved for
reuse
LES is attempting to clear an MES which
has sent an SCPC channel release
message but is found still to be
transmitting 5.12 s later
1651 No
circuit/channel
available.
LES is rejecting the call because an
appropriate channel unit is not currently
available at this specific LES
1661 Recovery on
timer expiry
LES is clearing the call because of an
interruption in reception of the MES carrier
exceeding the allowed time limit
16C1 Reserved
16C2 Recovery on
timer expiry
LES is clearing the call because an
appropriate SCPC MES carrier has not
been received by the LES (at the
May 2005 99