Jinx wrote:

> Should I wait for a ring pause (ie no AC) before engaging the relay,
> to protect the analogue side from ring voltage, or does the exchange
> stop that voltage as soon as the relay is engaged ?

Since when you close the Relay, the line is shunted by a low resistor, 
high ring voltage will cease in that moment.
I'd count some rings anyway before closing the relay :)

-- 
Ciao, Dario
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist