Grandstream GXW4104 4-FXO Port VoIP Gateway:

The GXW FXO IP Analog Gateway series offers the small enterprise, SOHO, remote offices and multi-location enterprises a cost-effective, easy to deploy VoIP FXO solution. The GXW4104 allows any business to seamlessly connect multiple locations with 4 PSTN lines, to an IP PBX system, or with an existing traditional phone system.

• 4 or 8 ports
• 2 10/100 Mbps network ports
• Comprehensive codec support, caller ID, flexible dial plans and security protection
• Advanced security protection with SRTP
• Designed and tested for full interoperability with leading IP-PBXs, soft-switches and SIP-based environments
• PSTN Failover on power failure