... a variety of environments and support SIP server registration and call control. DAG 2000(32FXS)access gateway can realize flow media conversion ... between the IP and PSTN.Large port access gateway Standard SIP protocols Standard G.723.1,G.729A/B,PCM ... & 2, ETSI,BT,NTT, and, DTMF-based CIDPolarity ReversalYesHomologationSafetyULComplianceFCC,CE VoIP SIP Gateway With 32FXS Ports