Sony RSE-500 Operating Instructions Manual page 57

ISDN cause codes
If the connection failed via ISDN, the Video Transmitter displays the ISDN cause code which is sent by ISDN
network to show you the call status information.
Meaning
Unallocated (unassigned) number
No route to specified transit network
No route to dest
Channel unacceptable
Call awarded and being delivered in an established channel
Normal clearing
User busy
No user responding
User alerting, no answer
No reply
Call rejected
Number Changed
Non-selected user clearing
Destination out of order
Invalid number format (incomplete address)
Facility rejected
Response to STATus ENQuiry
Normal, unspecified
Circuit/channel congestion
Network out of order
Temporary failure
Switching equipment congestion
Access information discarded
Requested channel not available
Resource unavailable, unspecified
Quality of service unavailable
Requested facility not subscribed
IE
Meaning
Bearer capability not authorized
Bearer capability not presently available
Service or option not available, unspecified
Bearer capability not implemented
Channel type not implemented
Requested facility not implemented
Only restncted digital information bearer capability is available
Service or option not implemented, unspecified
Invalid call reference value
Identified channel does not exist
A suspended call exists, but this call identity does not
Call identity in use
No call suspended
Call having the requested call identity has been cleared
Incompatible destination
Invalid transit network selection
Invalid message, unspecified
Mandatory information element is missing
Message type non-exist, or not implemented
Message not compatible with call state or
message type non-existent or not implemented
Information element non-existent or not implemented
Invalid information element contents
Message not compatible with call state
Recovery of timer expiry
Protocol error, unspecified
Interworking, unspecified