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<DIV><FONT face=Arial size=2>Hi,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> I'm trying to transfer an incoming call
from the PSTN to another PSTN number through a SER - Asterisk system. SER
doing only routing..</FONT></DIV>
<DIV><FONT face=Arial size=2> pstn call-> SER -> asterisk (call
forward) -> SER -> pstn</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> Logic for SER: If something comes from the
pstn, send it to asterisk. If something comes from asterisk, send it to the
pstn.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> Every time I am getting a "Got SIP response
481 "Invalid CSeq Number back from" SER. And the call terminates.
Canreinvite makes a small difference here, If I have canreinvite=yes, I am able
to talk only in one direction and for a few seconds. With
canreinvite=no, CSeq error appears in the very moment you pick up the
phone. So every time the phone rings but It is not possible to
talk.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>At this point, I must confess I am lost.
First, I don't know if this loop is possible (pstn call-> SER ->
asterisk -> SER -> pstn), I tried it with two SER machines (pstn
call-> SER1 -> asterisk -> SER2 -> pstn) getting the same
result, CSeq comes from SER1. If it is possible, I don't know the issues with
this configuration. The forwarding works fine internally, I mean, extension 22
calling 25 which is forwarded to my mobile phone. Problem comes when It is a
pstn number calling 25. The connection pstn->SER->asterisk-> UA is also
perfect. I never had any problem transferring calls through asterisk, it seems
that, for some reason, things get worse when SER is an intermediary in the
communication.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Could anybody help me here, please?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> Victor.</FONT></DIV></BODY></HTML>