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

[Mark Phillips]

Try suggesting to BT that their copper sucks!

Jonathan k. Creasy wrote:
> 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