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 operator-class line echo cancellation, dynamic
delay oscillation buffer, modem detection and automatic switching
to G.711

Speech signal compression
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, banning 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, 50~60 Hz

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 Recommendation K.21, basic
level of verification)

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

Near and far communication
2 REN, up to 6000 feet for 24 AWG wire

Caller's number
Bellcore Type 1&2, ETSI, BT, NTT, and DTMF based CID

Disabling 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)