Cordless Voip Phone Support Voip 4G All Net Access 2 Lines Sip Telephone A TDM
Support 4G card can insert 1 SIM card (not included), support 4G full Netcom. SIP Protocol: SIP 2.0 (RFC3261). Item Type: Cordless Voip Phone. DTMF: In band, Out of band (RFC 2833) and SIP INFO. SIP Line: 2 Lines.