ISDN Events B-5
provided, for example, throughput or transit delay cannot be
supported.
Cause No. 50: requested facility not subscribed. The requested
supplementary service could not be provided by the network
because the user has not completed the necessary administrative
arrangements with the user’s supporting networks.
Cause No 57: bearer capability not authorized. The user has
requested a bearer capability implemented by the equipment which
generated this cause but the user is not authorized to use the
capability.
Cause No. 58: bearer capability not presently available. The user
has requested a bearer capability implemented by the equipment
which generated this cause but the capability 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. The equipment
sending this cause does not support the bearer capability
requested.
Cause No. 66: channel type not implemented. The equipment
sending this cause does not support the channel type requested.
Cause No. 69: requested facility not implemented. The equipment
sending this cause does not support the requested supplementary
service.
Cause No. 70: only restricted digital information bearer capability
is available. A device has requested an unrestricted bearer service
but the device 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.