Grandstream GXW 4104

Grandstream GXW 4104 is a VoIP gateway with 4 FXO ports, which offers small organizations, home users, remote offices and companies with distributed territorial system a high-performance solution with an excellent price/quality ratio for more efficient management of communication costs, while increasing the functionality of existing telephone systems of the organization. Grandstream GXW 4104 is a solution that can be easily integrated into the existing telephone system.

GXW 4104 was designed with an emphasis on compatibility with popular IP-PBX, Soft-switches and a lot of other different SIP-oriented devices. Grandstream GXW 4104 is developed using open standards. Grandstream GXW 4104 gateway have ultra-compact design, superb voice quality, rich functionality, highly security features and unbeatable price/performance ratio.
Technical characteristics:
4 analog FXO ports Support for H.264 codec ( up to 30 frames per second with CIF resolution) 2 RJ45 ports (can act as a bridge or a router) TFTP and HTTP SIP protocol (RFC3261) T.38 support Management and configuration through the Web RTP/RTCP/PPPoE support QoS: Diffserv, TOS, 802.1p/q Registration of up to 3 SIP servers Audio codec: G.711, G.723, G.729A/B, GSM, G.726 Security: SRTP/TLS/SIPS/HTTPS/Telnet pending Compatible with FCC, CE 12W power supply

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Google Voice Partners and Infrastructure

Google Voice is a VoIP/SIP program that can be used to make free or very cheap phone calls to many countries around the world. If you’re located in the United States, then your calls to the USA or Canada will be completely free. Not only that, but the program comes with a rich feature-set that includes voicemail, conference calls and video conferencing, SMS to email, a voice transcription service and a full featured contact list that lets you manage all your contacts’ details.

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zuzutel

Zuzutel.com offers a QUALITY and low-cost phone service including,Free calls,to landline and mobiles,Pc-PC,PC-Phone,Phone-Phone calls,SMSs worldwide,Email to SMS,Fax to Email,Email to fax,webfax,voicemail,Caller ID,follow-me,Video Conference calls with Ch