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ASAI and Call Control
Issue 7 May 1998
4-7
■ Outgoing calls barred (CS0/52)
The requested Third Party Make Call is being attempted over a trunk that
has been restricted from use by the originator.
■ Invalid Information Element contents (CS0/100)
The call_id specified by the Third Party Take Control capability is beyond
the maximum allowable call_id value. For example, you could get this
cause value if the ECS received a User to User Information (UUI)
Information Element longer than 32 bytes in an ASAI message or one that
did not include the header.
■ Message not compatible with call state (CS0/98)
The message is not compatible with the CRV state.
■ Service or option not subscribed/provisioned (CS0/50)
If an adjunct includes user-to-user information and the ECS field release is
not V3 or later, the ECS denies the request.
Protocol Error (NAK) Causes
The ECS issues the following cause for generating a protocol processing error:
■ Protocol error (CS0/111)
The Q.932 protocol has been violated or the capability invoked is not
consistent with this association. For example, invoking the Third Party
Make Call capability on a Domain Control association is inconsistent.
NOTE:
For more information regarding protocol errors and a complete list of
reason codes (cause values), see the
DEFINITY Enterprise
Communications Server CallVisor ASAI Protocol Reference
,
555-230-221.
Considerations
The ECS allows only one adjunct to control a call. Additional requests to control a
call by other adjuncts are denied by the ECS.
When a multifunction station user is receiving a dial tone on a call appearance
and the adjunct invokes a Third Party Make Call for that station, the ECS selects
the same call appearance and call_id to establish the call.
The sum of the dest_addr and dest_route_select parameters can equal 32 digits.