•A single 10/100/1000Mbps auto-sensing RJ45 port
•TLS and SRTP security with AES encryption technology to protect calls and accounts
•Automated provisioning options include TR-069 and XML config files
•Supports simultaneous 3-way voice conferencing per port
•Failover SIP server feature automatically switches to secondary server if main server loses connection
•Supports simultaneous T.38 or pass-through fax-over-IP per port
•Supports a wide range of caller ID formats
•Use with Grandstream’s UCM series of IP PBXs for Zero Configuration provisioning
•Supports advanced telephony features, including call transfer, call forward, call-waiting, do not disturb, message waiting indication, multi-language prompts, flexible dial plan and more
•Supports 16KHz wide-band voice sampling rate and wide-band codecs such as Opus and G.722
•Secure boot, unique certificate and random default password per device, dual firmware images
•Standard 1-Year Manufacturer’s Warranty (extended warranty up to total 3-year is available)

•Telephone Interfaces: 48 x RJ11 & 2 x 50-pin Telco connector
•Network Interfaces: 1 x 10M/100M/1000Mbps auto-sensing RJ45 port
•LED indicators: Power, LAN Link, LAN Activity, Connection Per Telephone Port
•LCD Display: Backlit 128x32 graphic LCD display with support for multiple languages
•Voice-over-Packet Capabilities: Window based carrier grade line echo cancellation, dynamic jitter buffer, modern detection & auto-switch to G.711
•Voice Compression: G.711, G.723, G.726-32, G.729, G.722 (wide band), iLBC, Opus (wide-band)
•Fax over IP: T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax Pass-through, Fax data pump V.17, V.21, V.27ter, V.29 for T.38 fax relay
•Telephony Feature: Caller ID display or block, call waiting, blind or attended call transfer, call forward, do not disturb, 3-way conference, last call return, paging, message waiting indicator LED (NEON LED) support and stutter tone, auto dial
•Caller ID: Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID
•Disconnect Methods: Busy Tone, Polarity Reversal/Wink, Loop Current
•Short/Long Haul: 2 REN (Up to 6000ft on 24 AWG)
•SIP Server Profiles & Accounts Per System: 4 distinct SIP server profiles per system and independent SIP account per telephone port

•1 x GXW4248 Gigabit Gateway