- Up to 20 SIP accounts per system; up to 20 lines per handset- DECT authentication and encryption technology to protect calls and account- 3-way audio conferencing for easy conference calls- Supports Push-to-Talk- Automated provisioning options include TR-069 and XML config files- Use with Grandstreams UCM series of IP PBXs for Zero Config provisioning- HD audio to maximize audio quality and clarity; full duplex speakerphone- Supports advanced telephony features including call transfer call forward call