GXP1620 is Grandstream’s standard IP phone for small businesses. This Linux-based model features-2 dual-colour line keys (with 2 SIP accounts and up to 2 phone appearances), 3 XML programmable context-sensitive soft keys, 3-way conferencing, multi-language support • Dual-switched 10/100 Mbps ports, (Integrated PoE on GXP1625 Only). Use with Grandstream’s UCM6 100 series IP PBX appliance for Zero-Config provisioning, 1-touch phone recording and more. HD wideband audio, superb dull-duplex speakerphone with advanced acoustic echo cancellation and excellent double-talk performance. Automated provisioning using TR-069 or encrypted XML configuration file, SRTP and TLS for advanced security protection, 802.1x for media access control • Large phonebook (up to 500 contacts) and phonehistory (up to 200 records). Additional features such as multi-language support, Electronic Hook Switch support for Plantronics headsets and phone-waiting allow the GXP1620 to be user-friendly and dependable IP phones.