[Serusers] cannot send BYE with pstn

[Wojciech Ziniewicz]

I have pstn (isdn) gateway 192.168.0.163, and I make calls using prefix "8" 
Here's a log from a local call (using CiscoATA186 and Wu-chuang Sipphone):

Apr  7 20:49:09 domenet /usr/sbin/ser[18289]: ACC: transaction answered:
method=PRACK, i-uri=sip:457 at 192.168.0.145:5060,
o-uri=sip:457 at 192.168.0.145:5060;user=phone;transport=udp,
call_id=jFB1bc1nyfwVovpk at 192.168.0.134, from="493"
<sip:493 at 192.168.0.122>;tag=ncHI214LorUb7iWW, code=200
. Apr  7 20:49:11 domenet /usr/sbin/ser[18283]: ACC: transaction answered:
method=INVITE, i-uri=sip:457 at 192.168.0.122,
o-uri=sip:457 at 192.168.0.145:5060;user=phone;transport=udp,
call_id=jFB1bc1nyfwVovpk at 192.168.0.134, from="493"
<sip:493 at 192.168.0.122>;tag=ncHI214LorUb7iWW, code=200
 Apr  7 20:49:11 domenet /usr/sbin/ser[18285]: ACC: request acknowledged:
method=ACK, i-uri=sip:457 at 192.168.0.145:5060,
o-uri=sip:457 at 192.168.0.145:5060;user=phone;transport=udp,
call_id=jFB1bc1nyfwVovpk at 192.168.0.134, from="493"
<sip:493 at 192.168.0.122>;tag=ncHI214LorUb7iWW, code=200

And here's a log from calling to pstn (using Wu-chuang sipphone and pstn
gateway) to number 0506633351 (isdn:506633351) :

Apr  7 20:52:54 domenet /usr/sbin/ser[18284]: ACC: request acknowledged:
method=ACK, i-uri=sip:8506633351 at 192.168.0.163:5060,
o-uri=sip:8506633351 at 192.168.0.163:5060,
call_id=yPeLkYYVQnG8fiOm at 192.168.0.134, from="493"
<sip:493 at 192.168.0.122>;tag=QpR2G8JxdXTiq265, code=200

As You can see, there's no BYE message ,but only if the pstn-side
disconnects. If the LAN side disconnects, theres a succesfull BYE message.

I use forwarding to pstn using the loop:

        if (loose_route())
                { t_relay(); break;
                }

        if (method=="INVITE") {
        record_route();
	                            };
        setflag(1);
        if (uri=~"^sip:8[0-9]{3}@*") {
                log(1, "Forwarding to ISDN...");
                rewritehostport ("192.168.0.163:5060");
                t_relay();
                log(1, "..forwarded\n");
                break;
        };

Moreover, calling PSTN there's only silence in LAN's side, although PSTN
hear LAN very good.

Where am i wrong ?
-- 
Pozdrawiam, 
Wojciech Ziniewicz 
Optocomp sp.z.o.o, www.optocomp.pl
mailto: wojtekz at optocomp.pl
+48(0)691031535