ASAI and Feature Interactions

Advice of Charge (AOC)

Starting with R5: In Germany and France, the public network does not cut through the voice path to an incoming B-channel until an ISDN-PRI CONNECT message is received from the called party. Thus, it is not advisable to route incoming ISDN-PRI calls over non-ISDN trunks without first providing answer supervision to the call (for example, wait, hearing music, call vector step).

Germany

The cause values sent by the network and expected from the user in the 1TR6 network are completely different from those defined by the CCITT (and used by ASAI). Therefore, in order to provide consistency, DEFINITY ECS will map those cause values received from the 1TR6 network to the most similar CCITT cause values.

The 1TR6 network does not provide the connected party number, and therefore the Alerting and Connected Event Reports will not contain this information for outgoing calls in Germany.

France (VN4)

The VN4 network generates several cause values coded as ITU-T/ETSI that are not supported by DEFINITY ECS.

Europe (ETSI)

The AOC feature includes two types: AOC-D and AOC-E. AOC-D provides charge information periodically throughout the call and also at the end of the call. AOC-E provides charge information when the call is disconnected.

Using AOC-D or AOC-E, it is possible that the network could be optioned to send currency instead of charging units. If this occurs, DEFINITY ECS will pass currency units to the adjunct without any indication that an option change occurred.

Last Number Dialed

The called party address (dest_addr) provided in a Third Party Make Call or Third Party Auto Dial capability is the last number dialed for the calling party (orig_addr) until the next call origination from the calling party. Therefore, the user can use the “last number dialed” button to originate a call to the destination provided in the last Third Party Make Call or Third Party Auto Dial capability. This does not apply to switch-classified calls.

Issue 7 May 1998 12-47

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Lucent Technologies 555-230-220 manual Last Number Dialed, Germany, France VN4, Europe Etsi