Grandstream Networks, Inc. GXW4024 User Manual Page 8 of 35
Firmware 1.0.1.8 Last Updated: 5/2008
GXW4024 FEATURES
The GXW4024 is a next generation IP voice gateway that is interoperable and compatible with leading IP-
PBXs, soft-switches and SIP platforms. The GXW4024 gateway is auto-configurable, remotely
manageable and scalable, offering superb voice quality, traditional telephony functionality, easy
deployment and 24 FXS ports respectively. GXW4024 features flexible dialing plans and integrated call
routing to support pure IP network calls.
S
OFTWARE FEATURES OVERVIEW
• 24 FXS ports
• One RJ-45 10/100MB auto-sensing Ethernet port
• Multiple SIP accounts & profiles (24 accounts / choice of 2 profiles per account)
• Supports Voice Codecs: G711(a/µ and Annex I & II), G723.1, G726 (ADPCM with 16/24/32/40
kbit/s bit rate), G729 A/B/E, iLBC
• T.38 Fax
• Comprehensive Dial Plan support for Outgoing calls.
• G.168 Echo Cancellation
• Voice Activation Detection (VAD), Comfort Noise Generation (CNG), and Packet Loss
Concealment (PLC)
• Supports PSTN/PBX analog telephone sets or analog trunks
• 50 Pin Telco connector for easy Chassis or Rack connection
T
ABLE 3: GXW4024 SOFTWARE FEATURES
Telephone Interfaces
RJ-11, 24 FXS SIP accounts & choice of 2 profiles
Network Interface
One 10M/100 Mbps LAN, RJ-45
LED Indicators
Power and Line LEDs
Voice over Packet
Capabilities
Voice Activity Detection (VAD) with CNG (comfort noise generation) and PLC
(packet loss concealment), AEC with NLP
Packetized Voice Protocol Unit (supports RTP/RTCP)
G.168 compliant Echo Cancellation, Adaptive Jitter Buffer, Fax/Modem
detection & auto-switch to G.711
Voice Compression
G.711 + Annex I (PLC), Annex II (VAD/CNG format) encoder and decoder,
G.723.1, G.726(ADPCM with 16/24/32/40 bit rates), G.729A/B/E, iLBC
G.726 provides proprietary VAD, CNG, and signal power estimation
Voice Play Out unit (reordering, fixed and adaptive jitter buffer, clock
synchronization), AGC (automatic gain control),
Status output, Decoder controlling via voice packet header
DHCP Client
Yes.
Fax over IP
T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711
for Fax Pass-through,
Fax datapump V.17, V.19, V.27ter, V.29 for T.38 fax relay
QoS
Diffserve, ToS, 802.1 P/Q VLAN tagging
IP Transport
RTP/RTCP
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