Mark Johnson wrote:
Hi Mark,
I think ATA-188 supports polarity reversal.
Cheers,
~Madhawa
I hope I don't sound stupid, but what does that mean? I can't find a
definition for polarity reversal and how it would help me. I do see
the 188 supports it, but I'm not sure what to do with it.
Thanks!!
Mark
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Hi Mark,
I've done this using SPA-2000, SPA-2000 can generate polarity reversal
signal, The pay-phone detects "call answer" and "hangup" by revesal signal.
also the pay-phone must be supported polarity reversal detection.
http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800a6210.shtml
http://michigantelephone.mi.org/distribute.html
Cheers,
~Madhawa
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