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The Linksys SPA2102 features two POTS (Plain Old Telephone Service) ports to connect existing analog phones, fax machines, or to a PBX system. The Linksys SPA2102 includes 2 100BaseT RJ45 Ethernet interfaces (LAN-WAN) to connect to a home or office LAN, as well as an Ethernet connection to a broadband modem or router (WAN). Each Linksys SPA2102 service line can be independently configured via software controlled by the service provider or the end user.
The Linksys SPA2102 delivers clear, high-quality voice communication in diverse network conditions. Excellent voice quality in a demanding IP network is consistently achieved via our advanced implementation of standard voice coding algorithms. The SPA2102 is interoperable with common telephony equipment like voicemail, Fax, PBX, and interactive voice response systems.
Check out these other Linksys VoIP adapters:
I have a 2102 for five years or more. Very solid, but slow. Half duplex and 2 Meg speed. Do not plug this directly into your modem. It will slow your connection to 0.5 Meg.
I am ordering a Gigahertz router and Linksys PAP2T with full Duplex and 10 Meg. Hopefully, that will allow me to phone and stream video at the same time.
Wish me luck.
Easy to setup
I set up line 1 with my hosted PBX in a Flash from the office and on line 2 i have a voipvoip.com sip trunk for my home system. Works perfect.
Good for the money, relatively easy to support
For a 2 line ATA, the SPA2102
works for us in office environments running direct accounts to SIP Trunks as well as remote extensions for asterisk/trixbox behind NATs. The main plus is the relatively large bit of information out on forums and blogs to support different setup challenges for this unit. The main con of any lower cost ATA is the inability to do "spanning" much like hunt groups with multiple SIP accounts. This ATA also doesn't have that ability. Overall, though, a very good unit and relatively easy to setup.