I have connected Asterisk with Panasonic pbx using fxo port the 4 extension on panasonic pbx are connected to fxo port like 221,222,223,224 and if we dial from panasonic pbx 221 than call received by Asterisk and than we have dial extension no. of Asterisk users. Sir, it is possible from panasonic pbx we dial directly Asterisk user extension like Asterisk users no. are 25, 26, 27, 28 and so on and if we want to dial extension 25 or 26 of Asterisk from panasonic pbx how we can do that. We are dial Panasonic no. from Asterisk without any problem.