Central Site Remote Access Switch 713C AUSE C ODES T ABLE19 13 no answer from device (device alerted)Indicates that the destination has responded to the connectionrequest but has failed to complete the connection within theprescribed time. Problem at remote end.21 15 call rejectedIndicates that the destination was capable of accepting the call (wasneither busy nor incompatible) but rejected the call for some reason.22 16 number changedIndicates that the ISDN number used to set up the call is no longerassigned to any system. If an alternate address has been assigned tothe called equipment, this may be returned in the diagnostic field ofthis message.23 17 reverse charging rejected24 18 call suspended25 19 call resumed26 1A non-selected device clearingIndicates that the destination was capable of accepting the call (wasneither busy nor incompatible) but rejected the call because it wasnot awarded to the device.27 1B destination out of orderIndicates that the destination could not be reached because theinterface was not functioning correctly and a signaling messagecould not be delivered for some reason. This may be a temporaryfault but one that is expected to last a relatively long time. Forexample, equipment off-line.28 1C invalid number format (incomplete number)Indicates that the connection could not be established because thedestination address was presented in an unrecognized format orbecause the destination address was incomplete.29 1D facility rejectedIndicates that the facility requested by the device could not beprovided by the network. This could be a subscription problem.30 1E response to STATUS INQUIRYIndicates that the status message was generated in direct response tothe prior receipt of a status enquire message.31 1F normal, unspecifiedReports the occurrence of a normal event when no standard causeapplies. No action required.33 21 circuit out of orderDec Value Hex Value Q.931 Cause