The Grandstream GXW4248 V2 FXS Gateway is fully compliant with SIP standards and interoperable with various VoIP systems, analog PBX and phones on the market. It features 48 FXS analog telephone ports, superb voice quality, a suite of telephony functionalities, easy provisioning, flexible dialing plans, advanced security protection and strong performance. The GXW4248 V2 offers businesses a cost-effective hybrid IP and analog telephone system that allows them to enjoy the benefits of VoIP communications.