... the IP and PSTN.Large port access gateway Standard SIP protocols Standard G.723.1,G.729A/B,PCM ... , ensure voice service quality , remote management and maintenance. It is capable to work well with mainstream softswitch providers. ... FeaturesCaller IDBellcore Type 1 & 2, ETSI,BT,NTT, and, DTMF-based CIDPolarity ReversalYesHomologationSafetyULComplianceFCC,CE VoIP SIP Gateway With 32FXS Ports