Product Details
- Yealink IP phone- SIP 2.0 (RFC3261) protocol- NAT transverse: STUN mode- IP assignment: DHCP/ static IP- Auto provision via TFTP/FTP/HTTP/PnP- QoS: IEEE 802.1p/q tagging (VLAN), layer 3ToS- In-band, out-of band (RFC2833) and SIP INFO DTMF- Proxy mode an