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ASAI and Call Control
4-4 Issue 7 May 1998
Third Party Make Call
The adjunct uses this initiating capability to establish a call between two parties.
Information Flow
An acknowledgment (ACK) is optional for the Third Party Make Call capability. If
requested, an ACK is sent to the adjunct when the ECS successfully originates
the call (a call identifier has been assigned). If conditions prohibit a call from being
established, a Negative Acknowledgment (NAK) is returned.
Starting with Release 6, if the UCID (Universal Call ID) is present, it is included in
the acknowledgment if administered to be sent. An application that wishes to
make use of the UCID should request an acknowledgment since the UCID is not
included in every event report.
Third Party Make Call Parameters
orig_addr [mandatory] The calling station’s address. For
non-Switch-Classified calls, the request is denied unless the
calling party is off-hook, idle, dialing, listening to dial tone,
goes off-hook within five seconds of the request, or is forced
off-hook by the ECS (through a speakerphone). See ‘‘Denial
(NAK) Causes’’ that follows.
dest_addr [mandatory] The called party’s address.
dest_route_
select
[optional] The trunk access code or feature access code [for
example, Automatic Route Selection (ARS), or Automatic
Alternate Routing (AAR)] of a called endpoint that is not
directly connected. Alternately, this information may be
included in the dest_addr.
return_ack [optional] If this parameter is present, it indicates that the
ECS should return an acknowledgement to the request. If
this parameter is not present, then the ECS does not return
an acknowledgement.
call_options Call options are listed below and described in detail in the
Third Party Make Call overview later in this section.
■ alert_order
■ ans_mach
■ direct_agent_call
■ max_ring_cycle
■ priority_calling
■ service_circuit
■ supervisor_assist