Grandstream GXW4104 4-Port FXO Analog VoIP Gateway

Grandstream GXW4104 4-Port FXO Analog VoIP Gateway Type - Gateway, LED Indicators - Yes, Network Interfaces - Dual 10/100 Mbps, Power Source - Universal Power Supply (100 - 240 VAC, 50 - 60Hz; Output 12VDC), Input Power - 100 - 240 VAC, 50 - 60Hz, Output Power - 12VDC, Wall Mount - Desktop, wall mount, Dimensions - 230 x 135 x 35mm, Features - SRTP security encryption technology, Provisioning options include TFTP and HTTP, PSTN Failover on power failure, Supports T.38 Fax  for creating Fax-over-IP, Supports a wide range of caller ID  formats, Others - Voice-over-Packet Capabilities: G.168 compiant Echo Cancelation, Dynamic Jitter Buffer, Moderm detection & auto-switch  G.711, PTSN Fail-over Life Line: PTSN failover on power failure, Voice Compression: G.711, G.723, G.726 (40/32/24/16), G.729A/B/E, G.728, iLBC, DHCP Client: Yes, Switched Mode or PPPoE, Fax over IP: T.38 compliant Group 3 Fax Relay up to 14.4kpbs & auto-switch to G.711 for Fax Pass-through, QoS: Diffserve, TOS, 802.1P/Q VLAN tagging, IP Transport: RTP/RTCP, DTMF Method: flexible DTMF transmission method, user interface of in-audio, RFC2833, and/or SIP info, IP Signaling: SIP (RFC 3261), SIP Server Profiles & Accounts Per  System: Up to 2 distinct SIP server profiles per system and independent SIP account per port, Media: SRTP, Management: Syslog support, HTTPS, telnet, remote mamangement using web browser, Warranty - 1 Year