[VoIP] VT1005 on Asterisk Polarity Reversal on Answer

[John Novack]

Shane Young wrote:

For those who are testing the VT1005:

Does it support polarity reversal on answer?

--Shane




Not quite sure what you mean by this question.
The V1005 is a dual port FXS that supports pulse dial, and interfaces to 
Asterisk via SIP.
Do you want reverse polarity when the called party answers?
The answer is no, id does not provide battery supervision except when 
the called party is busy. Then it either drops or reverses battery ( 
twice?) and the busy comes from the box
That is the way it works on Vonage, and also perhaps with Asterisk, 
though I am not sure what Sip response is sent to the ATA to cause that
An interesting feature is  if one flashes the box to place a call on 
hold, place another call through Asterisk, flash again and you are in a 
three way conference IN THE ATA. No star codes involved. If you don't 
set up the three way, after a period of time you hear two short beeps as 
a hold reminder.
I don't remember seeing that in the manual, but as Doug has mentioned, 
it isn't the greatest, and is easily missed.
I believe it was David Josephson who made the documentation available to 
me and perhaps Greg could put it on the ckts.info site as well.
Wonder if there is more to be had somewhere?

John Novack