32 FXS voip gateway, DAG2000-32S Supports G.711,G723.1,G.729 A/ ... codec. Suitable for carrier and enterprise VoIP call center agents.DAG 2000(32FXS)can be with the mainstream SIP proxy servers(such ... & 2, ETSI,BT,NTT, and, DTMF-based CIDPolarity ReversalYesHomologationSafetyULComplianceFCC,CE VoIP SIP Gateway With 32FXS Ports