Integration of the Trunk or the Extensions with the Asterisk PBX software is achieved through various hardware interfaces, called Gateways. We provide PRI Gateways to interface PRI to the PBX, FXO Gateway for Analog Trunks, GSM Gateway for GSM devices and FXS Gateways to use Analog Phones with IP PBX. We are the resellers for DINSTAR, VEGA, DIGIUM and GRANDSTREAM Brands.