Failover switches (also called Fallback, Line Protection, or A/B Fallback switches) can switch a circuit between two based on a manual or automatic trigger. Some can be controlled via TCP/IP.

• POTS line failover
  • beroNet Failover Switch 4 Port Failoverswitch. Supporting PRI/BRI/FXS/FXO/Ethernet. 2 Modes (Failover and Fallback)
  • OpenVox Failover Box FA40/FB40/FD40 Four Port Analog/BRI/T1/E1/Ethernet interfaces USB Controlled.
  • Use a line splitter and hope Asterisk does not fail off-hook
  • Use a line splitter that gives priority to one line (the backup line) See http://www.willyselectronics.com/pdfs/telephone.pdf and search for PN 30-9330 "Message Stopper".
  • Viking Electronics makes a failover device for up to 6 lines: PF-6
  • DataProbe switches (some controllable via TCP/IP)
  • Cornet Technology switches
  • WTI switches (some controllable via TCP/IP)
  • the Sipura SPA 3000 has one fxo and one fxs port. If the power goes out it will automatically connect the two ports
  • Shang332 provides power down and ip down failover. it can failover to pstn and also to another ip peer.
  • beroNet berofos Multiport Failover Switch 4 Port PRI/BRI/Analog/Ethernet Failover Switch controllable via Network
  • FailSafeVOIP Automatically Switch T1/E1/BRI/POTS Connections on failure
  • Rhino Single Port Failover Switch USB controlled
  • http://www.shoremicro.com/web2/redundant_page.htm

• T1 failover
  • beroNet Failover Switch 4 Port Failoverswitch. Supporting PRI/BRI/FXS/FXO/Ethernet. 2 Modes (Failover and Fallback)
  • OpenVox Failover Box FA40/FB40/FD40 Four Port Analog/BRI/T1/E1 interfaces USB Controlled.
  • DataProbe switches (automatic failover and TCP/IP Control
  • Cornet Technology switches
  • WTI switches (some controllable via TCP/IP)
  • beroNet berofos Multiport Failover Switch 4 Port PRI/BRI/Analog/Ethernet Failover Switch controllable via Network
  • FailSafeVOIP Automatically Switch T1/E1/BRI/POTS Connections on failure
  • Rhino Single Port Failover Switch USB controlled
  • http://www.shoremicro.com/web2/redundant_page.htm

• RS-232/V.35/etc failover
  • Hullspeed switches (some controllable via TCP/IP)
  • Altecon switches
  • DataProbe switches (some controllable via TCP/IP)
  • Cornet Technology switches
  • WTI switches (some controllable via TCP/IP)
  • http://www.shoremicro.com/web2/redundant_page.htm (most controllable by TCP/IP)
• Ethernet failover
  • WTI switches (some controllable via TCP/IP)
  • DataProbe switches (some controllable via TCP/IP)
  • FailSafeVOIP Automatically Switch T1/E1/BRI/POTS Connections on failure
  • Rhino Single Port Failover Switch USB controlled
  • http://www.shoremicro.com/web2/redundant_page.htm (Absence of packet and loss of Link Signal automatic failover)
• generic RJ-45 failover (POTS,PRI,BRI,Ethernet...)
  • ISDNGuard from Junghanns, keep-alive via RS-232
  • Rhino Single Port Failover Switch USB controlled
  • beroNet berofos Multiport Failover Switch 4 Port PRI/BRI/Analog/Ethernet Failover Switch controllable via Network
  • http://www.shoremicro.com/web2/sm2501.htm

• ISP failover
  • Having multiple connections to the Internet from different providers can be a challenging configuration puzzle. Some routers are designed to make this easy for simple installations.
  • See the Small Routers with Multiple WAN Interfaces section in VOIP Routers for more information.

The following is not really a failover type of product, but it might be useful for some people:

• T1/E1 Multiport Repeaters
  • GL Communications Single/Dual Multiport Repeaters.

Description: The single version provides ten identical outputs from a single T1/E1 input. The dual version provides four outputs for each of two inputs. So you could use this to connect one or two T1/E1 to multiple Asterisk servers (where one server would of course not be running Asterisk until the other server is dead)

Where to Buy!

UK & Worldwide VoIPon - Best Prices and Support on Openvox Failover Solution Rhino 1PFail Junghanns ISDNGuard and BeroNet Bero Fos Call for reseller pricing or International Shipping. VoIPon.