Any of them can be configured to work with the VoIP service from companies like Acanac, 3web, Vbuzzer (only if you create a new account in a special way, please email me before creating the account), VoipStunt, VoipBuster, Freephoneline (for freephoneline you must purchase the "configuration file" from them in order to use an ATA) and many others. Each one of the routers has 2 phone lines configurable independently with 2 separate accounts. Simple configuration instructions will be provided for the most popular local VoIP companies. If you're not sure if these will works with your VoIP company, email me and I will find out for you.
Rock solid devices, more reliable than Linksys PAP2 and SPA2102.
They are all permanently unlocked and unlike the same models sold elsewhere, they have web configuration pages for the SIP settings.
All three of them have a built in router, so if you don't have a router at home, you can connect them without purchasing a router to share the Internet connection.
First one, model VT2142 has one WAN port and one LAN. This is suitable if you have only one PC connected to Internet. Price $45
The second one, VT2442 has 4 LAN ports, so you can connect more than one PC to it. Price $55
The last one, model VT2542 has 4 LAN ports and wireless as well, so you can connect wired and wireless computers. Price $70
The prices are firm.
model VT2142
model VT2442
model VT2542
