ip-pbx AlterCallSystem - Version 1.0.2.13 ip-pbx AlterCallSystem is use for creation of communication structures of any functional and complexity level. Ip-pbx allows to organise a high-grade telephone system in minimum short periods. ip-pbx AlterCallSystem it is simple at installation and customisation, it is not exacting in service. Supports any equipment, possesses a wide spectrum of possibilities for link and business.