Polycom RMX 2000 Administrator’s Guide
A-118Pre-Emption The call has been pre-empted.
9 Pre-Emption –
Circuit reserved
for reuse
Call is being cleared in response to user
request.
16 Normal Call
Clearing
Call cleared normally because user hung up.
17 User Busy Dialed number is busy.
18 No User
Responding
The called user has not answered the call.
19 No Answer from
User (User
Alerted)
Called user has received call alert, but has not
responded within a prescribed period of time.
Internal network timers may initiate this
disconnection.
20 Subscriber
Absent
User is temporarily absent from the network - as
when a mobile user logs off.
21 Call Rejected Called number is either busy or has
compatibility issues. Supplementary service
constraints in the network may also initiate the
disconnection.
22 Number
Changed
Same as Cause 1. The diagnostic field contains
the new called user number. Cause 1 is used if
the network does not support this cause value.
26 Non-Selected
User Clearing
The incoming call has not been assigned to the
user.
27 Destination Out-
of-Order
Messages cannot be sent to the destination
number because the span may not be active.
28 Invalid Number
Format (address
incomplete)
The Type of Number (TON) is incorrect or the
number is incomplete. Network, Unknown and
National numbers have different formats.
Table A-2 ISDN Disconnection Causes (Continued)
Disconnection Cause
Number Summary Description