Grandstream GXW4224, 24 x RJ11 FXS ports and 1 x 50-pin Telco connector, 1 x 10M/100/1000 Mbps auto-sensing RJ45 port, G.711, G. 723, G.726

Telephone connections GXW4216/4224/4232: 16/24/32 x RJ11 FXS ports and 1/1/2 50-pin connectors Telco GXW4248: 2 50–pin Telco connectors Network interfaces 1 x 10M/100M/1000Mbps RJ45 Port with Automatic Identification LED indicators LAN Link, LAN Activity, connection for each phone port LCD display 128x32 backlit graphic LCD display with multi-language support Speech transmission functions in batch mode Windows-based carrier-class line echo cancellation, dynamic delay oscillation buffer, modem detection and automatic switching to G.711 Compression of the speech signal G.711, G.723.1, G.726 (40/32/24/16), G.729 A/B, iLBC Fax by IP Fax relay of the third group of the standard T.38 with support for data transfer rates up to 14.4 Kbit/s and automatic switching to G.711 for fax transmission, a functional unit for transmitting and receiving data by fax V.17, V.21, V.27ter, V.29 for fax relays of standard T.38 Phone functions Displaying or blocking the caller's number, notification of an incoming call, blind or accompanied call transfer, forwarding, blocking incoming calls, three-way conference call, dialing the last incoming call, search call, LED indicator of an incoming message (NEON LED) and intermittent signal, auto-dial Quality of service DiffServ, TOS, 802.1P/Q VLAN tagging Network protocols TCP/UDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, PPPoE, STUN, LLDP (expected) DTMF method Configurable DTMF transmission methods, including In-audio, RFC2833, and/or SIP INFO Signal transmission SIP (RFC 3261) over UDP/TCP/TLS SIP server profiles and accounts for each system 4 separate SIP server profiles for each system and separate accounts SIP for each phone port Registration TFTP, HTTP, HTTPS, TR069 Safety SRTP*, TLS/SIPS, HTTPS (AES-128 encryption for SRTP*, TLS and HTTPS) Management Syslog, HTTPS, Web browser, telnet, Voice reminders, TR-069 Universal power supply GXW4232/4224/4216: Output: DC12V, 5 A; Input: 100~240V AC, 50~60Hz; GXW4248: Output: DC24V, 6.25A; Input: 100~240 VAC, 50~60Hz Environmental characteristics Operation: 0°C ~ 45°C; Storage: -20°C ~ 60°C; Humidity: 10％ ~90% (non -condensing) Electrical protection Overvoltage and overvoltage protection (ITU-T K.21 recommendation, basic level of verification) Installation Installation on a table and in a rack using front brackets Short- and long-range communication 2 REN, up to 6000 feet for 24 AWG wire The caller's number Bellcore Type 1&2, ETSI, BT, NTT, and DTMF-based CID Shutdown methods Busy signal, polarity change/instability, current in the circuit Compliance with regulatory requirements US Federal Communications Commission: Part 15 (CFR 47) Class B, Council of Europe: EN55022 Class B, EN55024, EN61000-3-2, EN61000-3-3, EN60950-1, RoHS, C-TICK: AS/NZS CISPR 22 Class B, AS/NZS CISPR 24, AS/NZS 60950, ITU-T K.21 (basic verification level); UL 60950 (power adapter)