Netopia Router PN Series - Manual (Page 265)

ISDN, DDS/ADN, and T1 Events D-7
Cause No 57: bearer capability not authorized. This cause
indicates that the user has requested a bearer capability
implemented by the equipment that generated this cause that the
user is not authorized to use.
Cause No. 58: bearer capability not presently available. This
cause indicates that the user has requested a bearer capability
implemented by the equipment that generated this cause which is
not available at this time.
Cause No 63: service or option not available, unspecified. This
cause is used to report a service or option not available event only
when no other cause in the service or option not available class
applies.
Cause No. 65: bearer capability not implemented. This cause
indicates that the equipment sending this cause does not support
the bearer capability requested.
Cause No. 66: channel type not implemented. This cause
indicates that the equipment sending this cause does not support
the channel type requested.
Cause No. 69: requested facility not implemented. This cause
indicates that the equipment sending this cause does not support
the requested supplementary service.
Cause No. 70: only restricted digital information bearer capability
is available. This cause indicates that a device has requested an
unrestricted bearer service but the equipment sending this cause
only supports the restricted version of the requested bearer
capability.
Cause No. 79: service or option not implemented, unspecified.
This cause is used to report a service or option not implemented
event only when no other cause in the service or option not
implemented class applies.
Cause No. 81: invalid call reference value. This cause indicates
that the equipment sending this cause has received a message with
a call reference which is not currently in use on the user-network
inter face.