... SIP clientsQoS scheme providing high priority to voice stream801.11b/g/n with double antennaDual USB2.0s for 3G dongle, ... call hold, park, recording,call transfer to PSTN, 3-way-conference, recording on flySIP proxy Support up to 8 SIP clientsSIP trunk ... network, outbound trunk sharingSoft Pad Click to call, contact list, presence, call history, listen to recording and voice messageMedia Stream: G. ...