How to send flash command on analog trunk (APA board)

[Rapetou]

Does anyone know how to send a flash command on an analog trunk?

My customer uses Centrex analog trunks and wants to have the ability to press a key on his phone (9 Series) to send a flash command on the carrier side to transfer a call externally.

Thanks

[rui.costa]

I have not heard about since long time.

Try the feature key “Calibrate Loop”.

Alternatively can be used the suffix (Features in Conversation) “Calibrate Loop”.

Best Regards
Rui Costa