Isdn Disconnection Causes - Polycom RMX 1500 Administrator's Manual

Table A-2 ISDN Disconnection Causes (Continued)
Number Summary
8 Pre-Emption
9 Pre-Emption –
Circuit reserved
for reuse
16 Normal Call
Clearing
17 User Busy
18 No User
Responding
19 No Answer from
User (User
Alerted)
20 Subscriber
Absent
21 Call Rejected
22 Number
Changed
26 Non-Selected
User Clearing
27 Destination Out-
of-Order
28 Invalid Number
Format (address
incomplete)
Polycom RMX 1500/2000/4000 Administrator's Guide
Disconnection Cause
Description
The call has been pre-empted.
Call is being cleared in response to user
request.
Call cleared normally because user hung up.
Dialed number is busy.
The called user has not answered the call.
Called user has received call alert, but has not
responded within a prescribed period of time.
Internal network timers may initiate this
disconnection.
User is temporarily absent from the network - as
when a mobile user logs off.
Called number is either busy or has
compatibility issues. Supplementary service
constraints in the network may also initiate the
disconnection.
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.
The incoming call has not been assigned to the
user.
Messages cannot be sent to the destination
number because the span may not be active.
The Type of Number (TON) is incorrect or the
number is incomplete. Network, Unknown and
National numbers have different formats.
A-11