Users 500 Concurrent Calls (Max) 80 Analog Ports (Max) 16 GSM Ports (Max) 8 UMTS Ports (Max) 8 BRI Ports (Max) 8 E1/T1/J1 0/1/2 LAN 1 10/100/1000Mbps WAN 1 10/100/1000Mbps VoIP Trunks 128 IVR 64 Voicemail Default 3000 min (upgradable) Protocol SIP (RFC3261), IAX2 Transport Protocol UDP, TCP, TLS, SRTP Audio Codec G711 (alaw/ulaw), G722, G726, G729A, GSM, Speex, ADPCM Video Codec H263, H263P, H264, MPEG4 DTMF In-band, RFC2833, SIP INFO IP Services DDNS, DHCP, Firewall, OpenVPN, PPPoE, QoS, Static IP, Static NAT, Static Route, STUN, VLAN One Touch Record (Manual) Support Call Recording (Auto) Support Redundancy Support MyTwins Support Audio In/Out – T.38 Fax Support SMS to Mail/Mail to SMS Support Add-ons Support Hard Disk 2.5 inch SATA2 USB 1 TF Card Slot – Dimensions (L × W × H) (mm) 440 × 280 × 44 Weight 3.4 kg Power AC 100-240V (DC 12V 5A) | Attended Transfer Blacklist Blind Transfer BLF Support Call Back Call Detail Records Call Forwarding Call Pickup Call Routing Call Waiting Caller ID Conference Define Business Hours Dial by Name DISA (Direct Inward System Access) Distinctive Ringtone DNIS Do Not Disturb Fax to Email Firewall Follow me IP Blacklist LDAP IVR (Interactive Voice Response) Intercom/Zone Intercom Mobility Extension Music on Hold Paging/Zone Paging Phone Provisioning PIN User Queue Ring Group Skype Integration Speed Dial Spy Functions Three-way Calling Video Calls Voicemail Voicemail to email Web-based control panel |