... and home voice call solutions. What the advantage of KAER VOIP phone? Better voice performance, Good signal, convenient to use, Good ... power supply, better call solution etcHow could you use our VOIP phone? First of all, register a SIP account,second connect the ... STUN in- network penetrationSupport 3 DTMF mode:In-band,RFC2833,SIP INF0Support 3 IP acquisition mode:static IP/DHCP/PPPoEBuilt in DNS ...