The Grandstream GXP2135 Phone offers:

- Enterprise-Grade High-Performance IP Phone
- Supports Gigabit speeds and up to 32 virtual BLF/speed-dial keys
- 2.8" TFT color LCD display
- Full HD audio with full duplex speakerphone
- Up to 8 lines and 4 SIP accounts
- Built-in Bluetooth for syncing with mobile devices and Bluetooth headsets
- Supports EHS-compatible Plantronics headsets
- RJ9 Headset port for wired headsets
- Conference calling up to 4 ways
- Ethernet Ports: 2 auto-sensing Gigabit with integrated PoE
- 4 Programmable soft keys
- Voice Codecs: G.729A/B G.711?/a-law G.726 G.722(wide-band) in-band and out-of-band DTMF (in audio RFC2833 SIP INFO)
- Wall-mountable
- QoS: 802.1Q 802.1P ToS DiffServ MPLS
- Security: user and admin passwords MD5 and MD5-sess based authentication 256-bit AES encrypted configuration file SRTP TLS 802.1x media access control
- Multi-language
- Power Source: 100-240V 12V 0.5A adapter (included) or 802.3af PoE
- Max PoE Power Consumption: 6.49W
- Hold
- Transfer
- Call forward
- Call park
- Call pickup
- Call waiting
- Call log with up to 500 records
- Music on hold
- Package Includes: GXP2135 phone handset with cord base stand universal power supply network cable quick installation guide GPL license