Grandstream GXW4004 is an analog FXS series gateway, has 4 FXS interfaces for connecting analog phones.

Grandstream GXW4004 - Analog FXS Series Gateway, is the ideal solution for business customers who want to connect one or more traditional PBX lines to a VOIP phone system or provider. 100M, PSTN Life Line for backup connection in case of power failure and RS232 serial port for administration.

• Support 2 SIP account profiles, caller ID for different countries and regions
• T.38 fax support, flexible dial plans, security (SIPS/TLS) and comprehensive voice codecs

Specifications: Grandstream GXW4004

Physical characteristics:
Dimensions (width x depth x height), cm:	23.0 x 13.5 x 3.5
Weight, kg:
Installation type, design features:	• Desktop version • Possibility of wall mounting
Power parameters:	• Output (DC): 12V • Input (AC): 100 – 240 V, 50 – 60 Hz
Status indicators:	Power, network and telephone lines
Buttons:
Equipment:
Processor and memory specifications:
CPU:
Memory:
Interface ports:
Network interfaces:	2 x RJ45 10/100 Mbit/s (LAN/WAN)
Voice interfaces:	• 4 x RJ-11 FXS • 1 x RJ-11 PSTN Backup
Other interfaces:	1 x RS232 (console port)
Expansion slots:
Network Features:
Functionality:
Data transfer:
Voice transmission:	• Voice, fax, modem: - G.168 compliant echo cancellation, dynamic jitter buffer, modem detection and automatic switching to G.711. - Life Line in case of PSTN power failure - Voice codecs: G.711, G.723, G.726 (40/32/24/16), G.729A/B/E, G.728, iLBC - DHCP server/client, NAT router or switch mode - Fax over IP: T.38 compatible 3rd party fax switching at up to 14.4 kbps and automatic switching to G.711 for fax pass-through (future) - QoS: Diffserve, TOS, 802.1P/Q virtual network marking - IP transport: RTP/RTCP • Alarm: - DTFM Method: Flexible DTFM Transfer Method, Incoming Audio User Interface, RFC2833 and/or SIP information - IP signaling: SIP (RFC 3261) - multiple SIP server profiles and accounts: up to 2 different SIP server profiles and 1 independent SIP account on each port - Backup: TFTP, HTTP, HTTPS (in the future)
Safety:	• Media: SRTP not available • Control: TLS/SIPS
Control:	Supports system log, HTTPS, Telnet, remote management via web browser