Polycom RealPresence 1800 Administration Manual page 322

ISDN Disconnection Causes
Number Summary
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
21 Call Rejected
22 Number Changed
26 Non-Selected User
Clearing
27 Destination Out-of-Order
28 Invalid Number Format
(address incomplete)
29 Facility Rejected
30 Response to STATUS
ENQUIRY
31 Normal, Unspecified
34 No Circuit/Channel
Available
38 Network Out-of-Order
39 Permanent Frame Mode
Connection Out-of-Service
Polycom, Inc.
Description
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.
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.
User requested supplementary service which cannot be provided by
the network.
A STATUS message has been received in response to a prior STATUS
ENQUIRY.
A normal, unspecified disconnection has occurred.
No B-Channels are available for the call.
Network is out-of-order because due to a major malfunction.
A permanent frame mode connection is out-of-service. This cause is
part of a STATUS message.
Disconnection Causes
301