Grandstream GXW4232, 32 x RJ11 FXS ports and 2 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 Telco connectors 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
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.723.1, G.726 (40/32/24/16), G.729 A/B, iLBC

Fax by IP
Fax relay of the third group of the T standard.38 with support for data transfer rates
up to 14.4 Kbit/s and automatic switching to G.711 for fax transmission,
V.17, V.21, V.27ter, V.29 functional data transmission and reception unit
for fax 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, NEON LED
and intermittent alarm, 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 surge protection (ITU-T K.21 recommendation, basic
verification level)

Installation
Installation on a table and in a rack using the front brackets

Near and far 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

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)