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 the T standard.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 surge protection (ITU-T K.21 recommendation, basic verification level) Physical characteristics Device Size: 440 mm (L) x 255 mm (W) x 44 mm (H) (1U) (GXW4248) 440 mm (L) x 185 mm (W) x 44 mm (H) (1U) (GXW4216/4224/4232) Device weight: 3.21 kg; package weight: 4.31 kg (GXW4248) 2.63 kg; 3.68 kg (GXW4232) 2.57 kg; 3.62 kg (GXW4224) 2.39 kg; 3.48 kg (GXW4216) 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, change/instability of polarity, 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)