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<DIV><FONT face="Times New Roman">Hi,</FONT></DIV>
<DIV><FONT face="Times New Roman"></FONT> </DIV>
<DIV><FONT face="Times New Roman">When I try to make a call using rtpproxy and
ser-0.8.14 (SIP UA <---> PSTN), most of the time the call will be
disconnected within 1 minutes. Sometimes, it will be so unstable that the call
be disconnected after 15 seconds. The above scenarios happens</FONT></DIV>
<DIV><FONT face="Times New Roman"></FONT> </DIV>
<DIV><FONT face="Times New Roman">Will this problem related to unstable
rtpproxy? Because I know that all packets will route through the server. once
rtp packet get loss, the call will be disconnected. Is this
correct?</FONT></DIV>
<DIV><FONT face="Times New Roman"></FONT> </DIV>
<DIV><FONT face="Times New Roman">Perhaps it depends on my ser.cfg.</FONT></DIV>
<DIV><FONT face="Times New Roman"></FONT> </DIV>
<DIV><FONT face="Times New Roman"></FONT> </DIV>
<DIV><FONT face="Times New Roman">Thomas</FONT></DIV>
<DIV><FONT face="Times New Roman"></FONT> </DIV>
<DIV><FONT face="Times New Roman"></FONT> </DIV>
<DIV><FONT face="Times New Roman">My ser.cfg:</FONT></DIV>
<DIV><FONT face="Times New Roman">
<DIV> </DIV>
<DIV> </DIV>
<DIV>#<BR># $Id: ser.cfg,v 1.21.4.1 2003/11/10 15:35:15 andrei Exp $<BR>#<BR>#
simple quick-start config script<BR>#</DIV>
<DIV> </DIV>
<DIV># ----------- global configuration parameters
------------------------</DIV>
<DIV> </DIV>
<DIV>debug=3 # debug level (cmd
line: -dddddddddd)<BR>fork=yes<BR>log_stderror=no # (cmd line: -E)</DIV>
<DIV> </DIV>
<DIV>check_via=no # (cmd. line:
-v)<BR>dns=no #
(cmd. line: -r)<BR>rev_dns=no # (cmd. line:
-R)</DIV>
<DIV> </DIV>
<DIV>listen=""<BR>port=5060<BR>children=4<BR>fifo_mode=0666<BR>fifo="/tmp/ser_fifo"</DIV>
<DIV> </DIV>
<DIV># ------------------ module loading
----------------------------------</DIV>
<DIV> </DIV>
<DIV>loadmodule "/usr/local/lib/ser/modules/mysql.so"<BR>loadmodule
"/usr/local/lib/ser/modules/sl.so"<BR>loadmodule
"/usr/local/lib/ser/modules/tm.so"<BR>loadmodule
"/usr/local/lib/ser/modules/rr.so"<BR>loadmodule
"/usr/local/lib/ser/modules/maxfwd.so"<BR>loadmodule
"/usr/local/lib/ser/modules/usrloc.so"<BR>loadmodule
"/usr/local/lib/ser/modules/registrar.so"<BR>loadmodule
"/usr/local/lib/ser/modules/textops.so"<BR>loadmodule
"/usr/local/lib/ser/modules/auth.so"<BR>loadmodule
"/usr/local/lib/ser/modules/auth_db.so"<BR>loadmodule
"/usr/local/lib/ser/modules/nathelper.so"</DIV>
<DIV> </DIV>
<DIV># ----------------- setting module-specific parameters
---------------</DIV>
<DIV> </DIV>
<DIV># -- usrloc params --</DIV>
<DIV> </DIV>
<DIV># Uncomment this if you want to use SQL database <BR># for persistent
storage and comment the previous line<BR>modparam("usrloc", "db_mode", 2)</DIV>
<DIV> </DIV>
<DIV># -- auth params --<BR># Uncomment if you are using auth
module<BR>#<BR>modparam("auth_db", "calculate_ha1", yes)<BR>#<BR># If you set
"calculate_ha1" parameter to yes (which true in this config), <BR># uncomment
also the following parameter)<BR>#<BR>modparam("auth_db", "password_column",
"password")</DIV>
<DIV> </DIV>
<DIV># -- rr params --<BR># add value to ;lr param to make some broken UAs
happy<BR>modparam("rr", "enable_full_lr", 1)</DIV>
<DIV> </DIV>
<DIV># -- Nathelper params --<BR>modparam("registrar", "nat_flag",
6)<BR>modparam("nathelper", "natping_interval", 30) # Ping
interval<BR>modparam("nathelper", "ping_nated_only", 1) # Ping only clients
behind NAT</DIV>
<DIV> </DIV>
<DIV># ------------------------- request routing logic
-------------------</DIV>
<DIV> </DIV>
<DIV># main routing logic</DIV>
<DIV> </DIV>
<DIV>route{</DIV>
<DIV> </DIV>
<DIV># -----------------------------------------------<BR># Sanity Check
Section<BR># -----------------------------------------------<BR> # initial
sanity checks -- messages with<BR> # max_forwards==0, or excessively long
requests<BR> if (!mf_process_maxfwd_header("10"))
{<BR> sl_send_reply("483","Too Many
Hops");<BR> break;<BR> };<BR> if ( msg:len > max_len )
{<BR> sl_send_reply("513", "Message too
big");<BR> break;<BR> };</DIV>
<DIV> </DIV>
<DIV># -----------------------------------------------<BR># NOTIFY Keep-Alive
Section<BR># -----------------------------------------------<BR> if
((method=="NOTIFY") && search("^Event: keep-alive"))
{<BR>
sl_send_reply("200","OK");<BR>
break;<BR> };</DIV>
<DIV> </DIV>
<DIV> # Nathelper<BR> if (nat_uac_test("3")) {<BR> # Allow
RR-ed requests, as these may indicate that<BR> # a NAT-enabled proxy
takes care of it; unless it is<BR> # a
REGISTER<BR> <BR> if (method == "REGISTER" || !
search("^Record-Route:")) {<BR>
fix_nated_contact(); # Rewrite contact with source IP of
signalling<BR> if (method == "INVITE")
{<BR> fix_nated_sdp("1");
# Add direction=active to SDP<BR>
};<BR> force_rport(); # Add rport parameter to
topmost Via<BR> setflag(6); #
Mark as NATed<BR> };<BR> };</DIV>
<DIV> </DIV>
<DIV> # we record-route all messages -- to make sure that<BR> #
subsequent messages will go through our proxy; that's<BR> # particularly
good if upstream and downstream entities<BR> # use different transport
protocol<BR> if (!method=="REGISTER") record_route(); </DIV>
<DIV> </DIV>
<DIV> # subsequent messages withing a dialog should take the<BR> #
path determined by record-routing<BR> if (loose_route()) {<BR> #
mark routing logic in request<BR> append_hf("P-hint:
rr-enforced\r\n");
<BR> route(1);<BR> break;<BR> };</DIV>
<DIV> </DIV>
<DIV> if (!uri==myself) {<BR> # mark routing logic in
request<BR> append_hf("P-hint: outbound\r\n");
<BR> route(1);<BR> break;<BR> };</DIV>
<DIV> </DIV>
<DIV> # if the request is for other domain use UsrLoc<BR> # (in case,
it does not work, use the following command<BR> # with proper names and
addresses in it)<BR> if (uri==myself) {</DIV>
<DIV> </DIV>
<DIV> if (method=="REGISTER") {</DIV>
<DIV> </DIV>
<DIV># Uncomment this if you want to use digest
authentication<BR> if (!www_authorize("", "subscriber"))
{<BR> www_challenge("",
"0");<BR> break;<BR> };</DIV>
<DIV> </DIV>
<DIV> save("location");<BR> break;<BR> };</DIV>
<DIV> </DIV>
<DIV> # if the dialed number lies in the range 35891500-35891799,
don't forward it to T1 Trunk GW <BR> if
((uri=~"^sip:(852|)358915[0-9][0-9]@") || (uri=~"^sip:(852|)358916[0-9][0-9]@")
|| (uri=~"^sip:(852|)358917[0-9][0-9]@")) {<BR> if
(uri=~"^sip:852*")
{<BR> strip(3);<BR> };<BR> };<BR> <BR> lookup("aliases");<BR> <BR> if
(!uri==myself) {<BR> append_hf("P-hint: outbound alias\r\n");
<BR> route(1);<BR> break;<BR> };<BR> <BR> #
native SIP destinations are handled using our USRLOC DB<BR> # Call
Routing Section<BR> if (!lookup("location"))
{<BR> if (uri=~"^sip:(852|)[0-9]{8}@")
{<BR> # Send to PSTN
Gateway<BR> route(2);<BR> break;<BR> };<BR> sl_send_reply("404",
"User Not
Found");<BR> break;<BR> };<BR> };<BR> append_hf("P-hint:
usrloc applied\r\n");<BR> route(1);</DIV>
<DIV> </DIV>
<DIV>}</DIV>
<DIV> </DIV>
<DIV>route[1] <BR>{<BR> # Nathelper<BR> if
(uri=~"[@:](192\.168\.|10\.|172\.(1[6-9]|2[0-9]|3[0-1])\.)" &&
!search("^Route:")){<BR> sl_send_reply("479", "We don't
forward to private IP addresses");<BR>
break;<BR> };</DIV>
<DIV> </DIV>
<DIV> # if client or server know to be behind a NAT, enable
relay<BR> if (isflagset(6)) {<BR>
force_rtp_proxy();<BR> };</DIV>
<DIV> </DIV>
<DIV> # NAT processing of replies; apply to all transactions (for
example,<BR> # re-INVITEs from public to private UA are hard to identify
as<BR> # NATed at the moment of request processing); look at
replies<BR> t_on_reply("1");<BR> <BR> <BR> # send it out
now; use stateful forwarding as it works reliably<BR> # even for
UDP2TCP<BR> if (!t_relay())
{<BR> sl_reply_error();<BR> break;<BR> };<BR>}</DIV>
<DIV> </DIV>
<DIV># PSTN Call to T1 Trunk GW<BR>route[2]
{<BR> rewritehostport("");<BR> if (isflagset(6))
{<BR> force_rtp_proxy();<BR> };
<BR> t_on_reply("1");<BR> if (!t_relay())
{<BR> sl_reply_error();<BR> break;<BR> };<BR>}</DIV>
<DIV> </DIV>
<DIV># !! Nathelper<BR>onreply_route[1] {<BR> # NATed
transaction ?<BR> if (isflagset(6) && status =~
"(183)|2[0-9][0-9]") {<BR>
fix_nated_contact();</DIV>
<DIV> </DIV>
<DIV> # Not all 2xx messages have a content body so here we make
sure<BR> # out Content-Length > 0 to avoid a parse error<BR> if
(!search("^Content-Length:\0"))
{<BR> force_rtp_proxy();<BR>
};<BR> # otherwise, is it a transaction behind a NAT and we
did not<BR> # know at time of request processing ? (RFC1918
contacts)<BR> } else if (nat_uac_test("1"))
{<BR>
fix_nated_contact();<BR> };<BR>}<BR></DIV>
<DIV>---------end of config -----------</DIV></FONT></DIV></BODY></HTML>