| Manufacturer's Product Code | WP820 |
| Protocol/Standards | SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS (A record, SRV, NAPTR), DHCP, SSH, TFTP, NTP, STUN, SIMPLE, LLDP-MED, LDAP, TR-069, 802.1x, TLS, SRTP, IPv6 |
| Voice Codecs | Support for G.711μ/a, G.729A/B, G.722 (wide-band), iLBC, Opus, in-band and out-of-band DTMF (In audio, RFC2833, SIP INFO) |
| Graphic | 2.4 inch (240x320) TFT color LCD |
| Peripherals | 3 soft keys, dial, hangup, speakerphone, phonebook, backlit keypad, proximity sensor, accelerator, vibration motor, volume button and navigation keys |
| Push-to-Talk | Customizable button for push-to-talk, panic call and other related functions |
| Bluetooth | Yes, Bluetooth 4.2 |
| Auxiliary Ports | 3.5 mm headset jack, Micro USB port for charging , dual-MIC, dual-color LED |
| Telephony | Hold, transfer, forward, 3-way audio conference, downloadable phonebook (XML, LDAP, up to 500 items), call waiting, call log (up to 100 records), off-hook auto dial, auto answer, click-to-dial, flexible dial plan, hot desking, personalized music ring- tones and music on hold, server redundancy and fail-over, push to talk |
| Operating System | Android 7.0, supports custom Android apps that fit the phone’s screen/keyboard |
| Security | User and administrator level passwords, MD5 and MD5-sess based authentication, 256-bit AES based secure configuration file, SRTP, TLS, 802.1x media access control |
| HD Audio | Yes, both on handset and speakerphone with support for wideband audio, HAC supported |
| QoS | Layer 2 (802.1Q, 802.1p), 802.11e and Layer 3 (ToS, DiffServ, MPLS) QoS |
| Upgrade/Provisioning | Firmware upgrade via TFTP/HTTP/HTTPS, mass provisioning using TR-069 or encrypted XML configuration file, manual upload, USB upgrade |
| Power & Green Energy Efficiency | Universal power adapter included, Input: 100-240VAC; Output: +5VDC, 1A (5W), 1500mA Li-ion battery, 150h standby time and 7.5h talk time |
| Durability | Drop-safe from 1.2 meter height |