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ASAI and Call Control
Issue 7 May 1998
4-65
Third Party Selective Drop Parameters
party_id [optional] Identifies the party on the call to be disconnected.
(If specified, do not specify resource_id.)
uui_info [optional] If there is UUI stored with a call, and if that UUI
came from an ISDN DISCONNECT message or in an ASAI
Third Party Drop Request, and if a party drops from the call
and a Drop Event Report results, then the ECS will include
the UUI stored with the call in the Drop Event Report.
UUI received in a successful Third Party Selective Drop on
the ASAI link or in an ISDN DISCONNECT message is
stored by the ECS with the call for the life of the call or until
overwritten due to a later UUI IE associated with the call.
The UUI IE sent over an ISDN trunk can contain more data
than the UUI IE sent to ASAI. This happens when the ISDN
trunk group is administered with supplementary service
protocol other than B, and the UUI IE Treatment is set to
“shared”. The UUI for ASAI is packed within the shared UUI
before it is sent over an ISDN trunk, and is unpacked at the
other end.
This is transparent to the ASAI adjuncts, with two exceptions:
1. If the maximum size UUI allowed on the ISDN trunk is
exceeded, then the lower priority data items will be
dropped. Whether or not this means that ASAI UUI is
dropped depends on the priorities of the data items.
These priorities are administered on each trunk group
form. Each item stored in shared UUI uses two extra
bytes.Therefore, if the ISDN trunk group is administered
to allow a shared UUI length of 32 bytes then the ASAI
UUI will be limited to 30 bytes instead of 32.
2. If a service provider, or customer equipment other than a
DEFINITY ECS (R6.3 or later) will be interpreting the
contents of the UUI IE, then the trunk group used to
place those calls should have its UUI IE Treatment set to
“service-provider”. This sends the UUI as specified by
the ASAI application, without change.
For more information, see the Section, ‘‘Integrated Services
Digital Network (ISDN),’’ in Chapter 12, ‘‘ASAI and Feature
Interactions.’’
resource_id [optional] Identifies a tone resource to be dropped. (If
specified, do not specify party_id.)