Grandstream GXW4024 is an analog gateway that allows small and medium business customers to create a cost-effective hybrid telephone system with IP and analog phones and take advantage of all the benefits of VoIP communications; 24 RJ11 (FXS) telephone ports.

Grandstream GXW4024 is an analog gateway that enables small and medium business customers to create a cost-effective hybrid IP/analog phone system and take advantage of all the benefits of VoIP communications while preserving their investment in their existing analog phones.

• Analog VoIP gateway SIP with high interface density
• Full compatibility with leading IP-PBX and softswitches
• Has 24 RJ11 telephone ports and a 50-pin Telco connector

Specifications: Grandstream GXW4024

Physical characteristics:
Dimensions (width x depth x height), cm:	44.5 x 26.9 x 4.45
Weight, kg:	2.8
Installation type, design features:	Can be rack mounted or wall mounted.
Power parameters:	• Input (AC): 100 – 240 V / 50 – 60 Hz • Output (DC): 12V, 3.0A
Status indicators:	Power and lines
Buttons:
Equipment:
Processor and memory specifications:
CPU:
Memory:
Interface ports:
Network interfaces:	1 x RJ-45 10/100 Mbps
Voice interfaces:	• 24 x RJ-1124 FXS • 50-pin Telco connector
Other interfaces:
Expansion slots:
Network Features:
Functionality:	• Caller ID: Bellcore types 1 and 2, ETSI, BT, NTT and DTMF based • Support for recruitment plans
Data transfer:	• DHCP client • QoS: Diffserve, ToS, 802.1 P/Q virtual network tagging • IP transport: RTP/RTCP
Voice transmission:	• Up to 2 SIP server profiles per system and independent accounts on each port • Functions: - Voice Activity Detection (VAD) with Comfort Noise Generation (CNG) and Packet Loss Concealment (PLC), AEC with NLP - Packetized Voice Protocol Unit (RTP/RTCP support) - G.168 compliant echo cancellation, dynamic jitter buffer, modem detection and automatic switching to G.711. • Compressed voices: - G.711 + Annex I (PLC), Annex II (VAD/CNG format) codec, G.723.1, G.726 (ADPCM with bitrates 16/24/32/40), G.729A/B/E, iLBC - G.726 provides support for VAD, CNG and signal strength estimation - Voice Play Out unit (reset, fixed and adaptive jitter buffer, clock synchronization), AGC (automatic gain control) - Status output, Decoder controlling using voice packet headers • Fax via IP: - T.38 compliant fax group 3 switching at up to 14.4 kbps and automatic switching to G.711 for fax passing - Datapump fax V.17, V.19, V.27ter, V.29 to switch fax T.38 • Flexible DTMF transmission method, incoming audio user interface, RFC2833 and/or SIP information • IP signaling: SIP (RFC 3261)
Safety:	Control: TLS/SIPS
Control:	• Backup: TFTP, HTTP and HTTPS • System log support, remote management via web browser and Telnet