Polycom RMX 1500 Administrator's Manual page 842

Polycom RMX 1500/2000/4000 Getting Started Guide
A-10
Table A-2 ISDN Disconnection Causes (Continued)
Number Summary
4 Send special
information tone
5 Misdialed trunk
prefix (national
use)
6 Channel
Unacceptable
7 Call awarded
and being
delivered in an
Established
channel
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
Disconnection Cause
Description
Return the special information tone to the
calling party indicating that the called user
cannot be reached.
A trunk prefix has erroneously been included in
the called user number.
The sending entity in the call does not accept
the channel most recently identified.
The incoming call is being connected to a
channel previously established for similar calls.
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.