Manual

PSTN Fallback Enhancement

call fallback reject-cause-code

Cisco IOS Release 12.2(2)XA

17 User busy Indicates that the called party is unable to accept

another call because the user busy condition has

been encountered. This cause value may be

generated by the called user or by the network. If

the user determines the busy, it is noted that the user

equipment is compatible with the call.

18 No user responding Indicates when a called party does not respond to a

call establishment message with either an alerting

or a connect indication within the prescribed period

of time allocated.

19 No answer from user (user

alerted)

Indicates when the called party has been alerted but

does not respond with a connect indication within a

prescribed period of time.

Note This cause is not necessarily generated by

ITU standard Q.931 procedures but may be

generated by internal network timers.

20 Subscriber absent Indicates when a mobile station has logged off,

when radio contact is not obtained with a mobile

station, or when a personal telecommunication user

is temporarily not addressable at any user-network

interface.

21 Call rejected Indicates that the equipment that is sending this

cause does not wish to accept this call although it

could have accepted the call because the equipment

that is sending this cause is neither busy nor

incompatible.

The network may also generate this cause,

indicating that the call was cleared because of a

supplementary service constraint. The diagnostic

field may contain additional information about the

supplementary service and reason for rejection.

22 Number changed Indicates when the called-party number indicated

by the calling party is no longer assigned. The new

called-party number may optionally be included in

the diagnostic field. If a network does not support

this cause value, cause No. 1, an unallocated

(unassigned) number, shall be used.

26 Non-selected user clearing Indicates that the user has not been awarded the

incoming call.

Table 1 ITU Cause Codes, Messages, and Meanings (continued)

Cause Code Displayed Message Meaning