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Appendix A-Disconnection Causes
A-14
63 Service or
Option Not
Available,
Unspecified
The service or option is unavailable. No other
disconnection cause applies.
65 Bearer
Capability Not
Implemented
The requested bearer capability is not
supported.
66 Channel Type
Not
Implemented
The requested channel type is not supported.
69 Requested
Facility Not
Implemented
The requested supplementary service is not
supported.
70 Only Restricted
Digital
Information
Bearer
Capability is
Available
(national use)
Unrestricted (64kb) bearer service has been
requested but is not supported by the
equipment sending this cause.
79 Service or
Option Not
Implemented,
Unspecified
An unsupported service or unimplemented
option has been requested. No other
disconnection cause applies.
81 Invalid Call
Reference Value
A message has been received which contains a
call reference which is currently unassigned or
not in use on the user-network interface.
82 Identified
Channel Does
Not Exist
A request has been received to use a channel
which is currently inactive or does not exist.
Table A-2 ISDN Disconnection Causes (Continued)
Disconnection Cause
Number Summary Description