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| Price | $189.99 | $43.99 to $62.05 | $57.00 to $104.84 | $33.95 to $80.53 | $35.13 to $43.43 |
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| Flash Memory Installed (Max) | Info unavailable | Info unavailable | Info unavailable | Info unavailable | None |
| Product Description | Linksys Phone Adapter PAP2 - VoIP phone adapter | Cisco Small Business Pro PAP2T Internet Phone Adapter with 2 VoIP Ports - VoIP phone adapter | Cisco Small Business Pro SPA2102 Phone Adapter with Router - VoIP phone adapter | Panasonic KX TGA575S - VoIP phone adapter | Zoom Model 5900 Phone Adapter for Skype - VoIP phone adapter |
| Dimensions (WxDxH) | 4 in x 4 in x 0.6 in | 4 in x 4 in x 1.1 in | 4 in x 4 in x 1.1 in | Info unavailable | 4.1 in x 3.1 in x 0.9 in |
| Device Type | VoIP phone adapter | VoIP phone adapter | VoIP phone adapter | VoIP phone adapter | VoIP phone adapter |
| OS Required | Info unavailable | Info unavailable | Info unavailable | Info unavailable | Microsoft Windows 2000 / XP |
| Features | DHCP support | ARP support DHCP support Syslog support DiffServ support 256-bit encryption | DMZ port NAT support DHCP support Syslog support | Info unavailable | Info unavailable |
| Localization | Info unavailable | North America | North America | Info unavailable | Info unavailable |
| Remote Management Protocol | Info unavailable | HTTP HTTPS | HTTP HTTPS | Info unavailable | Info unavailable |
| Storage Removable | None | None | Info unavailable | None | None |
| Weight | 4.9 oz | 5.4 oz | 5.3 oz | Info unavailable | Info unavailable |
| Manufacturer Warranty | Info unavailable | Info unavailable | Info unavailable | Info unavailable | 2 years warranty |
| Optical Storage | None | None | Info unavailable | None | None |
| Telephony Interfaces | 2 phone (FXS) | 2 phone (FXS) | 2 phone (FXS) | DECT | 1 line (FXO) 1 phone (FXS) |
| VoIP Protocols | SIP v2 | SIP v2 | SIP v2 | Info unavailable | Info unavailable |
| Enclosure Type | External | External | External | External | External |
| Network / Transport Protocol | Info unavailable | TCP/IP UDP/IP ICMP/IP | PPPoE TCP/IP UDP/IP ICMP/IP | Info unavailable | Info unavailable |
| Data Link Protocol | Ethernet Fast Ethernet | Ethernet | Ethernet Fast Ethernet | USB | Info unavailable |
| VoIP Services | Info unavailable | Info unavailable | Info unavailable | Skype | Skype |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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