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Post-Call Rules

Post-call rules may be defined to control DSG-SCP behaviour at the conclusion of a call when either the calling or called party has released the call.

An example post-call processing configuration might be:

...
        <post_call>
          <rule edp="rsf" action="release" cause="15" />                                 
          <rule edp="busy" action="release" cause="edp" />                   
          <rule tag="network" value="roaming" action="continue" notification="notf1" />                  
          <rule tag="network" value="home" action="announcement_continue"
                srp_name="OnSwitch" announcement_id="3" />                                              
        </post_call>
...

Note that this processing applies only after the actions continue or continue_period have been applied.

Configuration Details

Each rule can support the following attributes:

Attribute	Type	Description
`action`	String	[Required] The action to take when this rule is matched. Possible values are shown under Post-Call Rule Actions.
`tag`	String	[Conditional] The tag name to match the value for If `tag` is present, `value` must also be present.
`tag_x`	String	[Conditional] As for `tag`, but with `x` representing a unique pairing, e.g. `tag_1` or `tag_a`. A matching `value_x` must also be present.
`value`	(various)	[Conditional] The string or integer value to match against during rule selection. Required when `tag` is present.
`value_x`	(various)	[Conditional] As for `value`, but with `x` representing a unique pairing, e.g. `value_1` or `value_a`. A matching `tag_x` must also be present.
`originating`	Boolean	Whether this rule applies for originating calls. (Default: `true`)
`forwarding`	Boolean	Whether this rule applies for forwarding calls. (Default: `true`)
`terminating`	Boolean	Whether this rule applies for terminating calls. (Default: `true`)
`cause`	Integer	The release cause to send to the network if the `action` releases the call. May be specified as `edp` in order to pass through the received EDP cause from the network, if any. (Default: `31`)
`announcement_id`	Integer	[Required with `action` = `announcement_release` or `announcement_connect`] The announcement ID to play to the caller, if appropriate to the `action`.
`announcement_source`	String	The tag to use as the announcement ID to play to the caller, if appropriate to the `action`. If no value or a non-numeric value is found, `announcement_id` will be used instead.
`srp_name`	String	[Required with `action` = `announcement_release` or `announcement_connect`] The SRP name (as configured in the `ScpApp`) to use to play an announcement to the caller, if appropriate to the `action`.
`srp_source`	String	The tag to use as the SRP name to use to play an announcement to the caller, if appropriate to the `action`. If no value or a non-numeric value is found, `srp_name` will be used instead.
`divert_to`	String	[Required with `action` = `connect` or `announcement_connect`] The normalised destination digits to connect the call to, if approrpiate to the `action`.
`notification`	String	A notification message name to send when this rule applies.
`fci` or `sci`	String	An FCI or SCI message name to send when this rule applies. Only available for certain actions.
`edp`	String	Whether this rule applies only when a specific EDP has been received. If defined, must be a valid EDP name. (Default: match all EDPs)
`edp_cause`	String	Whether this rule applies only when a specific EDP cause has been received. (Default: match all EDP causes)
(other available fields)	(various)	Any number of selector rule available fields.

Note that, unlike other selector rules, the call state selectors at_initial, at_update, and at_terminate are not permitted, as post-call processing can only occur at the end of a call.

EDP Names

Post-call rules may specify which Event Detection Points to match on. Valid EDP names are:

busy: matches the EDPs oCalledPartyBusy or tBusy
rsf: matches the EDP routeSelectFailure
no_answer: matches the EDPs oNoAnswer or tNoAnswer
abandon: matches the EDPs oAbandon or tAbandon

Post-Call Rule Actions

Each post-call rule must specify a single action to take when a rule is matched during processing.

Note that all post-call rules are only applicable after the call has been completed (whether successfully or unsuccessfully).

No action will be performed if the calling party is no longer connected (but other non-telephony parameters such as notification may still apply).

The following actions are available:

Action	Possible Parameters	FCI/SCI?	Description
`continue`	-	No	Allow the call to continue as usual. This is functionally identical to the `release` action.
`release`	`cause`	No	Release the call immediately with the given `cause`.
`connect`	`divert_to`	Yes	Terminate the call to the provided `divert_to` with no further rating interaction.
`announcement_continue`	`announcement_id` `srp_name` `announcement_source` `srp_source` `cause`	No	Play the given announcement on the specified SRP (as configured under SRP Endpoints) and then apply handling as for `continue`.
`announcement_release`	`announcement_id` `srp_name` `announcement_source` `srp_source` `cause`	No	Play the given announcement on the specified SRP (as configured under SRP Endpoints) and then apply handling as for `release`.
`announcement_connect`	`announcement_id` `srp_name` `divert_to` `announcement_source` `srp_source`	Yes	Play the given announcement on the specified SRP (as configured under SRP Endpoints) and then apply handling as for `connect`.
`abort`	-	No	Send a `TC_ABORT` to end the call immediately.