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/web3/sm2512.htm Automatic and manual failover
- 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