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<DIV><FONT face=Arial size=2>Hi All!</FONT></DIV>
<DIV><FONT face=Arial size=2>Our company has the following problem and we would
like to ask you for some help.</FONT></DIV>
<DIV><FONT face=Arial size=2>We developed a GSM PCB add on module for our
existing IPPBX (see <A
href="http://www.ucpbx.com">www.ucpbx.com</A>).</FONT></DIV>
<DIV><FONT face=Arial size=2>At present it is detected as an FXO module and runs
in FXO context (communicates with Zaptel).</FONT></DIV>
<DIV><FONT face=Arial size=2>This is not the right solution but the best that I
can do for the time being.</FONT></DIV>
<DIV><FONT face=Arial size=2>There are two problems that I encountered and can
not solve:</FONT></DIV>
<DIV><FONT face=Arial size=2>1. When I call some GSM number from our IP PBX by
using a FXS module and when the GSM which </FONT></DIV>
<DIV><FONT face=Arial size=2>is called hangs up before the connection
is established (BUSY) I get a blank signal on the line which last
</FONT></DIV>
<DIV><FONT face=Arial size=2>indefinitely or until I hang up the </FONT><FONT
face=Arial size=2>receiver.</FONT></DIV>
<DIV><FONT face=Arial size=2>2. When I call the FXS module on our IP PBX
from a GSM, the phone attached to the FXS module rings.</FONT></DIV>
<DIV><FONT face=Arial size=2>If, however, I close the connection on the GSM side
before I have picked up the receiver (FXS) and answer the call
later</FONT></DIV>
<DIV><FONT face=Arial size=2>(pick up the receiver)</FONT> <FONT face=Arial
size=2> the line is again blank.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>In both cases I pass the proper ON_HOOK signals to
Zaptel when the on-hook event occurs. Unfortunately they get </FONT></DIV>
<DIV><FONT face=Arial size=2>disregarded. Is this some problem with the FXO
state-machine?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2>Youliy Ninov</FONT></DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.ucpbx.com">www.ucpbx.com</A></FONT></DIV></BODY></HTML>