[Asterisk-Users] Sipura spa-2000 / 3000: surge protection

[Jonathan k. Creasy]

I think he's talking about putting protection from the PSTN lines not
the incoming power. 

-Jonathan

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] 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
> 
> 
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-- 

Mark, G7LTT/KC2ENI
Randolph, NJ
http://www.g7ltt.com
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