I think he's talking about putting protection from the PSTN lines not the incoming power.
-Jonathan -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Phillips Sent: Thursday, August 25, 2005 11:32 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Sipura spa-2000 / 3000: surge protection You would? Why not just put then on a small UPS and have done with it? The UK has some of the cleanest electricity in the world. Unlike the US (what a big shock that was, moving here) where brown-outs and over volts are common I've never needed to add protection devices to the UK supply. Mark Peter Hoppe wrote: > 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 > > > _______________________________________________ > --Bandwidth and Colocation sponsored by Easynews.com -- > > Asterisk-Users mailing list > [email protected] > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > -- Mark, G7LTT/KC2ENI Randolph, NJ http://www.g7ltt.com _______________________________________________ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
