Grandstream GXW4504, 4 E1/T1/J1 port, 120 concurrent calls, support PRI, SS7, MFC R2, Dual self-adaptive Gigabit ports (switched or routed)

E1/T1/J1 interface
1/2/4 RJ45 ports, support up to 30/60/120 simultaneous VoIP calls

Network interface
Two Gigabit ports with auto-detection (switched or routed)

Peripheral Device Ports
(2) USB 3.0, (1) SD card slot

LED indicators
LAN, WAN, T1/E1/J1

LCD screen
128x32 dots with DOWN and OK buttons

Reset button
Yes, with a long press, a factory reset occurs, with a short press, a
reboot

Voice and Video
Packet speech transmission
LEC with NLP packet speech protocol, improved carrier
-class echo cancellation (128 ms when branching from the communication line), dynamic delay oscillation buffer,
modem detection and automatic switching to G.711

Speech and Fax codecs
G.711 A-law/U-law, G.722, G.723.1 5.3K/6.3K, G.726, G.729A/B, iLBC, AAL2-G.726-32

Fax by IP
Fax relay of the third group of the T.38 standard 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

Improving the quality of speech
Echo cancellation (G.168-2004), delay oscillation buffer, pause suppression (VAD, CNG), PLC

QoS
Layer 2 QoS (802.1Q, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) QoS

Communication and management
DTMF Methods
In-band audio, RFC2833, and SIP INFO


SIP Digital Communication (RFC 3261) over UDP/TCP/TLS, PRI, SS7, MFC R2, RBS (expected) PRI switching types:
Euro ISDN, nation, Q.SIG, CAS: MFC R2 (Argentina, Brazil, China, Czech Republic, Colombia, Ecuador,
Indonesia, ITU, Mexico, Philippines, Venezuela), SS7: ITU, ANSI, China
Update Firmware update via TFTP/HTTP/HTTPS or local download via HTTP

Device management
System log, HTTPS, Web browser, Voice prompts, Backup and
restore, port capture and packet capture

Network protocols
TCP/UDP/IP, RTP/RTCP, ICMP, ARP, DNS, DDNS, DHCP, NTP, TFTP, SSH, HTTP/HTTPS, PPPoE, STUN,
SRTP*, TLS, LDAP, PPP, Frame Relay (expected), IPv6, OpenVPN®

Status and statistics
Call status and history, device status monitoring and ISDN status monitoring
Safety

Data encryption
SRTP*, TLS, HTTPS, SSH, 802.1X

Custom ports
SIP port, RTP port, HTTP/HTTPS port

Advanced protection
Fail2ban, Warnings, Whitelist, Blacklist, Access control based
on a strong password

Physical parameters
Universal power supply Input: 100~240V AC, 50/60Hz; Output: post. current+12V, 2A
Size
GXW4501: Device weight: 2.350g; Package weight: 3130g
GXW4502: Device weight: 2.360g; Package weight: 3140g
GXW4504: Device Weight: 2.380g; Package weight: 3160g
Device Dimensions: 485mm (L) x 190mm (W) x 46mm (H)

Temperature and humidity
Operation: 32 to 113ºF / 0 to 45ºC, Humidity: 10 to 90% (non-condensing)
Storage: 14 to 140ºF / -10 to 60ºC, Humidity: 10 to 90% (non-condensing)
Rack and desktop installation

Additional functions
Multilingual support
Web IP: English, Simplified Chinese, Traditional Chinese, Spanish,
French, Portuguese, German, Russian, Italian, Polish, Czech;
Customizable IVR/voice prompts: English, Chinese, British English,
German, Spanish, Greek, French, Italian, Dutch, Polish,
Portuguese, Russian, Swedish, Turkish, Hebrew, Arabic; Customizable language
packs to support other languages

Accordance
FCC 47 C.F.R FCC Part 15 Class B
47 C.F.R FCC Part 68 (TIA-968-B Section 5.2.4 (T1+ISDN))
CE EN 55032,EN 55035,EN 61000-3-2,EN 61000-3-3,EN 60950-1,TBR 4 (E1+ISDN),TBR 12 (E1),TBR 13 (E1+ISDN)
RCM AS/NZS CISPR 32,AS/NZS 61000.3.2,AS/NZS 61000.3.3,AS/NZS 60950.1,AS/ACIF S016(E1),AS/
ACIF S038(E1+ISDN)
Other ITU K.21 (Enhanced Levels); UL 60950-1 (Power adapter)