Hi all. I want to thank you all for the great info and help that you provide in this mailing list. I am just starting to work with kamailio and still learning. I would like some help to point me on the right direction on our new challenge: We have a kamailio server acting basically as location server and call proxy. We are connected to a PSTN gw to reach the outside world. It is working fine but now the client requested some changes that may imply we work with username base subscribers (user1. Characters based) at kamailio side but we still need to convert these usernames to numbers when sending the call to the PSTN gw. Username-number should be fix and can be stored in a table on the db. We would need to lookup userpart of all the header (from, to, contact.) and substitute incoming username with the peer number for calls from the app to pstn. And translate numbers to usernames on the calls from pstn to the apps. I am reading uac module and the sqlops module to search in the db before the substitution but I am not sure if that is the best approach to the problem. Could anyone point me in the right direction or suggest a better way to do that? Have anyone already implemented this type of modifications? I am a bit worried for the dialog consistency although I've read the uac module should take care of it Thanks in advanced Helena From: Helena Garcia-Nieto [mailto:helena.gnieto@morodo.co.uk] Sent: martes, 10 de diciembre de 2013 16:19 To: 'Kamailio (SER) - Users Mailing List' Cc: helena.gnieto(a)morodo.co.uk Subject: 500 I'm terribly sorry error Hello, Thanks in advanced for the help. I am almost new with kamailio and still struggling through silly problems so please forgive me if the solution is so obvious. I have a network like Xlitle -- Kamailio -- GW The GW is more or less out of my reach for changing the behaivour. As devices I have xlitle Kamailio is on version 4.0.2 I've changed only few things from the default config file. Add mysql support, auth, userlocdb, pstngw. For this part, gw routing , I've defined gw ip and port inside the PSTN definition like: #!ifdef WITH_PSTN # PSTN GW Routing # # - pstn.gw_ip: valid IP or hostname as string value, example: # pstn.gw_ip = "10.0.0.101" desc "My PSTN GW Address" # # - by default is empty to avoid misrouting pstn.gw_ip = "" desc "PSTN GW Address" pstn.gw_port = "" desc "PSTN GW Port" iskratel.gw_ip = "10.XX.XX.XX" iskratel.gw_port = "5060" #!endif I route the calls with: route(ISKRATEL); And defined a routing function route[ISKRATEL] { #!ifdef WITH_PSTN # check if ISKRATEL GW IP is defined if (strempty($sel(cfg_get.iskratel.gw_ip))) { xlog("SCRIPT: PSTN rotuing enabled but iskratel.gw_ip not defined\n"); return; } # only local users allowed to call if(from_uri!=myself) { sl_send_reply("403", "Not Allowed"); exit; } if (strempty($sel(cfg_get.iskratel.gw_port))) { $ru = "sip:" + $rU + "@" + $sel(cfg_get.iskratel.gw_ip); } else { $ru = "sip:" + $rU + "@" + $sel(cfg_get.iskratel.gw_ip) + ":" + $sel(cfg_get.iskratel.gw_port); } # Add profix to ISKRATEL: A99901 subst_uri('/^sip:(.*)/sip:A99901\1/i'); # add A99901 route(RELAY); exit; #!endif return; } I can see that the code goes all the way to the route(relay) but all I can see is the 500 I'm terribly sorry, server error occurred (7/SL) and a second response 500 I'm terribly sorry, server error occurred (7/TM) I've tried defining the IP as the given pstn.gw_ip and route(pstn) without changing anything on the pst default routing but the response of the server is the same. I cannot see any special error on the logs. I have the exact same config for this part, in another test server and the calls go to the gw without reporting any error. I'll appreciate any help from you! Thanks in advanced for your time Helena