1. The Industrial Phone SIP VoIP Board Supports standard SIP 2.0 protocol.
2. Three auxiliary relays are available.
3. Power supply: DC5V-15V, compatible POE IP PBX power supply mode (POE 802.3af Class 48V)
4. Lightening protection to ITU-T recommendation K.21.
5. Multiple key options: support dial any telephone number, hands-free, handset, the numeric keypad and function keys, speed dial keys, LCD screen, editing keys.
6. Configurable via the web page, serial link, or download.
7. Crystal sound quality and easy to install.
8. Support OEM, ODM, and customized order.
