Caller ID Call Transfer Call History Call Hold Do Not Disturb Call Forwarding Call Park Call Pickup Ring Group Business Calling Features Video Calls VPN Client (PPTP/L 2TP) VPN server (PPTP/L 2TP)
IAX2 (RFC 5456) SIP (RFC3261)
TLS STRP UDP TCP
Audio Codecs: Opus/G.722/G.711-Ulaw/G.711-Alaw/G.726/G.729/GSM/SPEEX Video Codecs: VP8/H.261/H.263/H.263+/H.264 Fax: T.38 (passthrough)