Q.850 Cause Codes - Polycom HDX Series Administrator's Manual

Administrator's Guide for Polycom HDX Systems

Q.850 Cause Codes

C - 4
Code Cause
621 Invalid Address
626 Invalid Address
627 Invalid Address
648 No Network
Resources
681 No Network
Resources
The following table describes codes that the ISDN switch sends to the Polycom
HDX system to indicate call status. Although the codes are standardized, each
ISDN service provider defines them differently. Because of this, the definitions
in the table may not exactly match the messages that you see.
Code Cause
1 Unassigned number
2 No route to specified
transit network
3 No route to
destination
6 Channel
unacceptable
7 Call awarded and
delivered
16 Normal call clearing
17 User busy
Description
The address you entered is not valid. Check the
calling information and try again.
The address you entered is not valid. Check the
calling information and try again.
The address you entered is not valid. Check the
calling information and try again.
The network does not have the necessary
resources to complete your call. Try the call again
later.
The network does not have the necessary
resources to complete your call. Try the call again
later.
Definition
The switch received the sent ISDN number in the
correct format, but no destination equipment uses
the number.
The ISDN exchange does not recognize the
intermediate network through which to route the
call.
The intermediate network through which the call is
routed does not serve the destination address.
The specified channel does not provide adequate
service quality to accept the requested
connection.
The user is assigned an incoming call that is being
connected to a call channel that has already been
established for this user and this type of call.
The originator or receiver of the call has requested
that it be cleared.
All B channels are in use; the called system
acknowledges the connection request, but is
unable to accept the call.