Integrate each telecommunications
	Each FXO of PBX connects each communication to save expenses.
	Pepole don't change the dialing habit.
	Hardware
	For example:set up Line1 use Telecom.A to dial out; Line2---Telecom.B ; Line3---Skype.
	you want to dial to mobile in Telecom.A then you can choice Line1 to dial out, it can save expenses.