aurora
Sonata
Hand Held ISDN Tester—User Guide
A2-2 427869
Disconnection & Clearing
Cause Codes
This Appendix explains the Cause Codes generated by the
network (external codes) or aurora
Sonata
itself (internal codes)
to explain why a call has failed, cleared or been disconnected.
External codes
The following codes are generated by the network at the
exchange to which your equipment is connected.
ETSI external codes
1 Unallocated (unassigned) number
The destination that the caller requested cannot be reached
because, although the number is in a valid format, it is not
currently assigned (allocated).
2 No route to specified transit network
The equipment has received a request to route the call through
a network which it does not recognise—either the network
does not exist or it does not serve this equipment.
3 No route to destination
The destination that the caller requested cannot be reached
because the network through which the call has been routed
does not serve that destination.
6 Channel unacceptable
The last identified channel is not acceptable to the sending
entity.
7 Call awarded & being delivered in established channel
The incoming call is being connected to a channel already
established to the user for similar calls, (e.g. packet mode).
16 Normal call clearing (peer)
The call is being cleared at the request of one of the users
involved in the call.
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