... .1, PCMA/U and G.729AB voice codec. Suitable for carrier and enterprise VoIP call center agents.DAG 2000(32FXS)can be ... /B,PCM A/U code Call forwarding, Call hold, Caller ID, DND standard voice service Anonymous call, Direct IP Call and Busy tone Fax over ... ) supports SIP 1.0/2.0.Main featuresSupport Call forwarding, Call waiting, Call display etc standard voice service and Busy tone, Fax over IP ...