PictureTel Concorde 4500, Administrator'S Manual

Page: 234 / 250

X.21 CALL PROGRESS MESSAGES
D-8
Cannot complete
call as dialed.
Check number—
dial again.
(continued)
Selection signals procedure
error (22) Information element/parameter non-
existent or not implemented (98)
This cause indicates that the equipment
sending this cause has received a message
that includes information element(s)/
parameter(s) not recognized because the
information element identiÞer(s)/
parameter name(s) are not deÞned or are
deÞned but not implemented by the
equipment sending the cause. This cause
indicates that the information element(s)/
parameter(s) were discarded. However, the
information element is not required to be
present in the message in order for the
equipment sending the cause to process the
message.
Message not compatible with call state
(101)
This cause indicates that a message has
been received which is incompatible with
the call state.
Protocol error, unspeciÞed (111)
This cause is used to report a protocol error
event only when no other cause in the
protocol error class applies.
Table D-1: X.21 Call Progress Signals and Q.931 Cause Codes (Continued)
Message Text X.21 Signal and Code Q.931 Cause and Code