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

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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
Power, LAN Link, LAN Activity, connection for each phone port

LCD display
128×32 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, G.726-32, G.729, G.722 (wide band), iLBC, Opus (wide-band)

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 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, 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, FTP, FTPS, TR069

Safety
SRTP*, TLS/SIPS, HTTPS (AES-128 encryption for SRTP*, TLS and HTTPS), Advanced protection with secure download, unique certificate and random default password

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 ~ 40°C; Storage: -10°C ~ 60°C; Humidity: 10~90% (non-condensing)

Electrical protection
Overvoltage and surge protection (ITU-T K.21 recommendation, basic verification level)

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
FCC: Part 15 (CFR 47), Class B
IP: ICES-003
CE: EN55032 Class B, EN55035, EN IEC 61000-3-2, EN61000-3-3, EN IEC 62368-1, RoHS
C-TICK: AS/NZS CISPR 32, Class B, AS/NZS 62368.1, AS/CA S003.1
ITU-T K.21 (basic test level); UL 60950 (power adapter)