I am located in the UK, and I am using Sipura spa-2000 adapters to
connect analog phones to a voip network. The network connects to the
PSTN as well via the Sipura spa-3000 adapter.
I would like to provide surge protection for the spa-2000 and the
spa-3000 adapters.
1. For spa-2000, fxs port: What is the maximum tip-to-ring voltage
before damage to the the adapter occurs?
2. For spa-2000, fxs port: What is the maximum voltage between both legs
and ground before damage to the the adapter occurs? (I have looked
inside an spa-2000 adapter and saw that the board has a ground plane
integrated; the four screw holes seem to connect to that ground plane)
3. For spa-2000, network port: Would I need any surge suppression? What
would be a good way forward? I suspect all I need would be some clamping
device on the TX/RX pairs that restricts the voltage?
4. For spa-3000, fxo port: Again, maximum tip-to-ring voltage before
damage.
5. For spa-3000, fxo port: Maximum voltage between both legs and ground.
Thank you very much for your consideration!
Peter Hoppe
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