Main Features Base on Asterisk Configuration by Web Built-in SIP/IAX Server Static/DHCP/PPPoE network access Codec: G.711-Ulaw, G.711-Alaw, G.726, G.729, GSM, SPEEX SIP/IAX Trunk(use with VoIP Trunk operator) Zap Trunk(Use with PSTN) SIP/IAX Extensions(connect with IP Phone) Zap Extensions(connect with Analog Phone) Voice Mail Server Flexible Dial Plan Call Conference IVR Server Music On Hold Call Queue Call Logs Support IP Phone with Key function FAX T.38 Other basic function: Packing List ZPX04/08 1 Unit Power Adapter 1 Unit â_ CD 1 PCS Packing Size: Inner box MEAS: 280*210*80mm G.W/unit: 1.5kg Carton MEAS: 300*440*425mm G.W: 16kg PCS/CTN: 10PCS