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Call Scenarios and Applications
Issue 7 March 1998
A-77
The second scenario is similar to the first, except that the CPN/BN (and thus the
II-Digits) is not included in the SETUP message. Instead, DEFINITY ECS decides
on a call-by-call basis when to ask the network for the CPN/BN. In this case,
DEFINITY ECS asks for CPN/BN, and the II-Digits are included along with the
CPN/BN.
Host
Call Offered Event
Comment
Queued Event
Public
(CPN = 908 555 1234)
Call SETUP message
(No CPN)
Call placed to Split 1.
Call rings at agent.
CONNect message
Agent answers.
Calling Party Drops
Alerting Event
Connected Event
Public Network
Another call drops,
Network ACKs
DEFINITY ECS
(II-Digits = 0x02)
(Domain = Split 1)
(Domain = Split 1)
(No II-Digits)
(CPN = 908 555 1234)
(II-Digits = 0x02)
(Domain = Split 1)
(CPN = 908 555 1234)
(II-Digits = 0x02)
Drop Event
(No II-Digits)
CONNect ACK message
DISConnect message
CONNect message.
. . . . . .
making an agent
available.
DEFINITY ECS
Network
(No II-Digits)
FACility message
(NSF = CPN preferred)
requests CPN, or BN
if CPN not available.
FACility ACK
(CPN = 908 555 5678)
(II-Digits = 0x02)
Call offered to Split 1.
Call waits in queue.
provides CPN and
II-Digits.