XFBACALL and XFBADIAL are features that can be activated in FEASU.
If one is activated then the other is deactivated.
They both are features for transferring calls by operators, which then conflicts with the ACLIGHT feature which is also for transferring calls by Operators.
This is my workaround, it works for me because my customer does not have AC any more just OS40 with BLF.
149.1 Feature Description
The parameter XFBADIAL in AMO FEASU activates this feature centrally in a system. It allows consultation hold before end of dialing for the first connection.
Alternatively, this feature can be activated using the parameter XFBACALL in AMO FEASU. This feature allows consultation call either after end of dialing (free or non-evaluated) for the first connection or from the time when the call was routed into the analog network.
Only one of the two parameters may be set.
The second alternative must be used, if features such as returning FWD/BUSY, LCR rerouting or LCR expensive routing are to be used on the S0/S2 trunk group of the first connection.
To prevent unauthorized use of this feature the parameter SUTVA in AMO COSSU can be configured.
In order to be able to use “Transfer before Answer ex Call State” for outgoing trunk and tie traffic, the COT parameter TRBA must be set locally in the S0/S2 B channel trunk group of the first connection in the originating node. It is of no importance whether the first connection is routed in the own or an external network (e.g. PTT) or whether the called party is located in the own or an external network.
Consultation call for an outgoing connection via S0/S2 activated by an authorized station for a voice service can be initiated only after the system received the acknowledgment of the first connection and the FEASU parameter “Extension Transfer Before Answer ex Dial State” is set. An ANATE can initiate consultation call without consultation key only after it received the end of dialing (free or non-evaluated) acknowledgment, as the consultation function is derived from the dialing information.
Otherwise, consultation call for an outgoing connection via S0/S2 activated by an authorized station for a voice service can be initiated only after the system received the end of dialing (free or non-evaluated) acknowledgment of the first connection, or from the time when the call was routed into the analog network and the parameter XFBACALL in AMO FEASU is set.
IMPORTANT: Up to now consultation call could only be initiated from the station after the first call entered talk state.
If the outgoing S0/S2 first connection (preferably a trunk call) is in call state or digit-sequence transmission, the A station can transfer the first connection to station C who is on consultation hold and has answered. Station C can be located internally in the system or in a network which is connected via S0/S2.
The first call (via S0/S2) can only be transferred, if one of the two connections is in talk state.
