sr-users May 2003

sr-users@lists.kamailio.org

52 participants
100 discussions

[Serusers] ser, pstn gateways
by Jev 27 Jun '03

27 Jun '03

Hello all, Im using ser, with esteras softphone, and a couple of cisco ata186's. I have to say I really like ser, as it is small fast, and reliable without being over complicated. I would like to know what other ser users and developers use for pstn gateways? I have a openline4 card from voictronix, but there is no software support for sip (When I bought it I thought I would use h.323). I have looked at cisco's pstn gateway modules, but was turned off them because of price, and lack of clear straight forward information to name but two reasons. Ideally what I would like to have is a solution that would support at least 4 pstn lines (expandable to maybe 8), that would run on FreeBSD (or at worst linux), works well with sip & ser, with high quality audio, and minimal delays when dialing in out. TIA, -Emil

4 4

[Serusers] XJAB problem: infinite forking
by Peter Kostik 20 Jun '03

20 Jun '03

Hello everyone, I am playing around with the new CVS ser 0.8.11pre28 downloaded couple days ago. I am attaching my config script and also the output of syslog with errors. Afer I start ser it starts forking new processes until it crashes the box (fills up the memory). The script is little advanced, uses jabber,pa,msilo... Thanks for your help. You are doing great job. Can't wait till next release. Peter. ser.cfg: -------- # # $Id: ser.cfg,v 1.19 2003/05/07 11:56:44 janakj Exp $ # # simple quick-start config script # # ----------- global configuration parameters ------------------------ debug=3 # debug level (cmd line: -dddddddddd) fork=yes log_stderror=no # (cmd line: -E) /* Uncomment these lines to enter debugging mode debug=7 fork=no log_stderror=yes */ check_via=yes # (cmd. line: -v) dns=no # (cmd. line: -r) rev_dns=no # (cmd. line: -R) port=5060 children=4 fifo="/tmp/ser_fifo" # ------------------ module loading ---------------------------------- # Uncomment this if you want to use SQL database loadmodule "/usr/local/lib/ser/modules/mysql.so" loadmodule "/usr/local/lib/ser/modules/print.so" loadmodule "/usr/local/lib/ser/modules/textops.so" loadmodule "/usr/local/lib/ser/modules/sl.so" loadmodule "/usr/local/lib/ser/modules/tm.so" loadmodule "/usr/local/lib/ser/modules/rr.so" loadmodule "/usr/local/lib/ser/modules/maxfwd.so" loadmodule "/usr/local/lib/ser/modules/msilo.so" loadmodule "/usr/local/lib/ser/modules/usrloc.so" loadmodule "/usr/local/lib/ser/modules/registrar.so" loadmodule "/usr/local/lib/ser/modules/jabber.so" loadmodule "/usr/local/lib/ser/modules/pa.so" # Uncomment this if you want digest authentication # mysql.so must be loaded ! #loadmodule "/usr/local/lib/ser/modules/auth.so" #loadmodule "/usr/local/lib/ser/modules/auth_db.so" # ----------------- setting module-specific parameters --------------- # -- usrloc params -- #modparam("usrloc", "db_mode", 0) # Uncomment this if you want to use SQL database # for persistent storage and comment the previous line modparam("usrloc", "db_mode", 2) modparam("usrloc", "db_url", "sql://nser:heslo@localhost/nser") modparam("msilo", "db_url", "sql://nser:heslo@localhost/nser") #modparam("msilo", "registrar", "sip:registrar@deimos") # -- auth params -- # Uncomment if you are using auth module # #modparam("auth_db", "calculate_ha1", yes) # # If you set "calculate_ha1" parameter to yes (which true in this config), # uncomment also the following parameter) # #modparam("auth_db", "password_column", "password") modparam("jabber", "db_url", "sql://sip_jab:heslo@localhost/sip_jab") modparam("jabber", "jaddress", "test") modparam("jabber", "jport", 5222) modparam("jabber", "workers", 2) modparam("jabber", "max_jobs", 10) modparam("jabber", "aliases", "5;aim.test;icq.test;msn.test;yahoo.test;jabber.test;") modparam("jabber", "jdomain", "jabber.test") # ------------------------- request routing logic ------------------- # main routing logic route{ # initial sanity checks -- messages with # max_forwards==0, or excessively long requests if (!mf_process_maxfwd_header("10")) { sl_send_reply("483","Too Many Hops"); break; }; if (len_gt( max_len )) { sl_send_reply("513", "Message too big"); break; }; # we record-route all messages -- to make sure that # subsequent messages will go through our proxy; that's # particularly good if upstream and downstream entities # use different transport protocol record_route(); # loose-route processing loose_route(); # if the request is for other domain use UsrLoc # (in case, it does not work, use the following command # with proper names and addresses in it) if (uri==myself) { if (method=="REGISTER") { # Uncomment this if you want to use digest authentication # if (!www_authorize("iptel.org", "subscriber")) { # www_challenge("iptel.org", "0"); # break; # }; save("location"); if (search("egistration")) { log("XJAB: going online in Jabber net\n"); if (jab_go_online()) { sl_send_reply("200", "Accepted"); } else { sl_send_reply("404", "Not Found"); }; } else { log("XJAB: going offline in Jabber net\n"); if (jab_go_offline()) { sl_send_reply("200", "Accepted"); } else { sl_send_reply("404", "Not Found"); }; }; # egistrarion if (m_dump()) { log("MSILO: offline msgs dumped\n"); } else { log("MSILO: no offline msgs dumped\n"); }; break; }; # register if (method=="SUBSCRIBE") { if (t_newtran()) { handle_subscription("registrar"); }; break; }; # subsribe # native SIP destinations are handled using our USRLOC DB if (!lookup("location")) { if (method=="MESSAGE") { log("MESSAGE received -> storing\n"); if (!t_newtran()) { sl_reply_error(); break; }; if (m_store("0")) { log("MSILO: offline msg stored\n"); if (!t_reply("202","Accepted")) { sl_reply_error(); }; } else { log("MSILO: offline msg not stored\n"); if (!t_reply("503","Service Unavailable")) { sl_reply_error(); }; }; break; }; # message sl_send_reply("404", "Not Found"); break; }; # lookup }; # myself if ( search("To:.*@aim\.test") || search("To:.*@icq\.test") || search("To:.*@msn\.test") || search("To:.*@yahoo\.test") || search("To:.*@jabber\.test") ) { if (!t_newtran()) { sl_reply_error(); break; }; if (method=="MESSAGE") { log("MESSAGE received -> manage it w/ XJAB\n"); if (search("\n:on")) { if (jab_go_online()) { sl_send_reply("200", "Accepted"); } else { sl_send_reply("404", "Not Found"); }; break; }; if (search("\n:off")) { if (jab_go_offline()) { sl_send_reply("200", "Accepted"); } else { sl_send_reply("404", "Not Found"); }; break; }; if (search("\n:join")) { if (jab_join_jconf()) { sl_send_reply("200", "Accepted"); } else { sl_send_reply("404", "Not Found"); }; break; }; if (search("\n:exit")) { if (jab_exit_jconf()) { sl_send_reply("200", "Accepted"); } else { sl_send_reply("404", "Not Found"); }; break; }; if (jab_send_message()) { sl_send_reply("202", "Accepted"); } else { sl_send_reply("503", "Service Unavailable"); }; break; }; if (method=="SUBSCRIBE") { handle_subscription("jabber"); break; }; log("NON_MESSAGE request received for Jabber GW -> dropt\n"); sl_send_reply("202", "Accepted"); break; }; # forward to current uri now; use stateful forwarding; that # works reliably even if we forward from TCP to UDP if (!t_relay()) { sl_reply_error(); }; } error log from /var/log/messages: --------------------------------- May 29 10:58:11 hat /usr/local/sbin/ser[2180]: ERROR: parse_to: invalid To - unexpected end of header in state -1073745156 May 29 10:58:11 hat /usr/local/sbin/ser[2180]: send_xpidf_notify(): Error while parsing May 29 10:58:11 hat /usr/local/sbin/ser[2180]: handle_subscription(): Error while sending notify May 29 10:58:11 hat /usr/local/sbin/ser[2180]: ERROR: t_reply: can't generate 200 reply when a final 200 was sent out May 29 10:58:11 hat /usr/local/sbin/ser[2180]: send_reply(): Error while sending 200 OK May 29 10:58:23 hat /usr/local/sbin/ser[2178]: ERROR: parse_to: invalid To - unexpected end of header in state -1073745156 May 29 10:58:23 hat /usr/local/sbin/ser[2178]: send_xpidf_notify(): Error while parsing May 29 10:58:23 hat /usr/local/sbin/ser[2178]: handle_subscription(): Error while sending notify May 29 10:58:23 hat /usr/local/sbin/ser[2178]: ERROR: t_reply: can't generate 200 reply when a final 200 was sent out May 29 10:58:23 hat /usr/local/sbin/ser[2178]: send_reply(): Error while sending 200 OK May 29 10:58:29 hat /usr/local/sbin/ser[2210]: XJAB:xjab_check_workers: worker[0][pid=2217] has exited - status=0 err=-1 errno=10 May 29 10:58:11 hat /usr/local/sbin/ser[2180]: ERROR: parse_to: invalid To - unexpected end of header in state -1073745156 May 29 10:58:11 hat /usr/local/sbin/ser[2180]: send_xpidf_notify(): Error while parsing May 29 10:58:11 hat /usr/local/sbin/ser[2180]: handle_subscription(): Error while sending notify May 29 10:58:11 hat /usr/local/sbin/ser[2180]: ERROR: t_reply: can't generate 200 reply when a final 200 was sent out May 29 10:58:11 hat /usr/local/sbin/ser[2180]: send_reply(): Error while sending 200 OK May 29 10:58:23 hat /usr/local/sbin/ser[2178]: ERROR: parse_to: invalid To - unexpected end of header in state -1073745156 May 29 10:58:23 hat /usr/local/sbin/ser[2178]: send_xpidf_notify(): Error while parsing May 29 10:58:23 hat /usr/local/sbin/ser[2178]: handle_subscription(): Error while sending notify May 29 10:58:23 hat /usr/local/sbin/ser[2178]: ERROR: t_reply: can't generate 200 reply when a final 200 was sent out May 29 10:58:23 hat /usr/local/sbin/ser[2178]: send_reply(): Error while sending 200 OK May 29 10:58:29 hat /usr/local/sbin/ser[2210]: XJAB:xjab_check_workers: worker[0][pid=2217] has exited - status=0 err=-1 errno=10 May 29 10:58:29 hat /usr/local/sbin/ser[2210]: XJAB:xjab_check_workers: worker[1][pid=2218] has exited - status=0 err=-1 errno=10 May 29 10:58:29 hat /usr/local/sbin/ser[2216]: XJAB:xjab_check_workers: worker[0][pid=2243] has exited - status=0 err=-1 errno=10 May 29 10:58:29 hat /usr/local/sbin/ser[2216]: XJAB:xjab_check_workers: worker[1][pid=2244] has exited - status=0 err=-1 errno=10 May 29 10:58:29 hat /usr/local/sbin/ser[2213]: XJAB:xjab_check_workers: worker[0][pid=2245] has exited - status=0 err=-1 errno=10 May 29 10:58:29 hat /usr/local/sbin/ser[2213]: XJAB:xjab_check_workers: worker[1][pid=2246] has exited - status=0 err=-1 errno=10 May 29 10:58:40 hat dhcpd: DHCPDISCOVER from 00:90:b1:59:0e:00 via eth0: network 200.200.52.0/24: no free leases May 29 10:58:49 hat /usr/local/sbin/ser[2210]: XJAB:xjab_check_workers: worker[0][pid=2247] has exited - status=0 err=-1 errno=10 May 29 10:58:49 hat /usr/local/sbin/ser[2210]: XJAB:xjab_check_workers: worker[1][pid=2248] has exited - status=0 err=-1 errno=10 May 29 10:58:49 hat /usr/local/sbin/ser[2216]: XJAB:xjab_check_workers: worker[0][pid=2249] has exited - status=0 err=-1 errno=10 May 29 10:58:49 hat /usr/local/sbin/ser[2216]: XJAB:xjab_check_workers: worker[1][pid=2250] has exited - status=0 err=-1 errno=10 May 29 10:58:49 hat /usr/local/sbin/ser[2213]: XJAB:xjab_check_workers: worker[0][pid=2251] has exited - status=0 err=-1 errno=10 May 29 10:58:49 hat /usr/local/sbin/ser[2213]: XJAB:xjab_check_workers: worker[1][pid=2252] has exited - status=0 err=-1 errno=10 __________________________________ Do you Yahoo!? Yahoo! Calendar - Free online calendar with sync to Outlook(TM). http://calendar.yahoo.com

2 4

[Serusers] Re: First tests with nathelper
by Maxim Sobolev 07 Jun '03

07 Jun '03

I've just committed into the cvs the autopinging feature useful to keep NAT bindings alive. If possible, please test and let me know then. Basically, everything you need to do is to recompile/reinstall ser and all modules and add the following into your config: modparam("nathelper", "natping_interval", N) Where N is some non-zero interval in seconds (usually 15-30 should be OK). Thanks! -Maxim On Tue, Apr 29, 2003 at 09:38:44PM +0100, jaime(a)umtstrial.co.uk wrote: > Hello Maxim, > > I have been trying your module on one server with a customised > configuration, very similar to the default one in nathelper.cfg. Actually, > I'm trying to connect through a NAT to a server running SER with the > nathelper module. The overall configuration looks like this: > > UA1 --- NAT --- SER (proxy and registrar) > UA2 | > > UA1 and UA2 must traverse a NAT in order to reach SER. The NAT does not > have port forwarding whatsoever. > > I was trying to see what happens to REGISTER, SUBSCRIBE, MESSAGE and > INVITE messages. The nathelper adds rport and received to the Via field, > so any response from the server gets routed correctly to the appropriate > destination (that is, the NAT external interface). > > REGISTER's Contact is stored at registration and the 200 OK reaches the > initiating client through the NAT. > > However, any other SIP message involving a database lookup into "location" > will try to relay the message to the natted client, which is not reachable > from the SER proxy (see diagram above). I think this could work if in > location table you stored the "received" and "rport" values instead of the > "Contact" field received when regitering (if that does not go against > standards...). Then, just keep alive the NAT binding somehow (I think you > where mentioning it in a previous email). > > Does this sound resonable? Making this scenario work would allow people at > home with simple NAT's to use a public proxy (like Iptel's) and its > services (Instant Messaging and Presence mainly)... > > Jaime > > >

5 4

[Serusers] iptel.org SIP applications at VoN London (booth #4)
by Andy Blen 31 May '03

31 May '03

As speaker and exhibitor at the event, iptel.org is glad to invite you to VoN London (http://www.pulver.com/europe2003/). We will be presenting our application architecture for integration of SIP telephony with legacy networks and Internet services. In the exhibition, we are located in the booth #4 (nic.at) as a part of a world-wide ENUM trial which leverages our SIP Express Router (SER) (http://www.iptel.org/ser/). We will be demonstrating ENUM interoperability and our SIP applications based on the latest SER version with numerous new features (media component, ENUM support, DDM, presence agent, NAT traversal, web applications, etc.) On the 9th, iptel.org founder, Jiri Kuthan, will be holding a SIP tutorial (9am-6pm). On the 10th, he will participate in an "Open Source Voice" session (2:15-3:30pm) and share our deployment experience with audience. See you in London. If you need to arrange a time-slot with us, drop us an e-mail. Andy Blen

1 0

[Serusers] function is_user_in in latest cvs
by Toni Barata (EPS) 30 May '03

30 May '03

Hi everyone, What's happening to the function (In the latest CVS version of Ser)?: int is_user_in(struct sip_msg* msg, char* hf, char* group); When I use this function in the config file it returns an error. Did it change is name? Did it simply desapear? What coud it be missing here? Best Regards, Toni

2 1

Re: [Serusers] Multiply Domain Registration Problem
by Jiri Kuthan 30 May '03

30 May '03

At 03:43 PM 5/13/2003, Andrzej Radke wrote: >One question yet. >What with aliases for separate domains ? That depends... If that is about numbers (the common case) you can designate a numbering plan that can be shared accross the domains (prefix 1--domain 1, prefix 2 -- domain 2) -- then you will have only 1 alias table to maintain. >Have to I add something to my configuration ? >something like this: save("aliases") save("aliases1") >for separate domian registration ? Typically you do not modify aliases from SER scripts on receipt of a SIP message -- you just look them up. -Jiri

1 0

[Serusers] forward to PSTN
by Andrzej Radke 30 May '03

30 May '03

Hello again ;) I'd like forward all numerical URI to my PSTN gateway if (uri=~"^sip:[0-9]*@gda.pl") { forward(10.10.10.1, 5060); }; But if I haven't numerical user in my contact i.e <sip:2411@10.10.10.1>;q=1.00;expires=1073143945 it doesn't works. This statement ( if (uri......) is unnecesary :( when I will add new permament contact for numerical URI. Do I all my numbers write statically to contact ???? What can I do when I have their a hundreds ?? Maybe should I add some config peer for my PSTN Gateway (C2600) ?? Greetings Andrzej Radke

4 7

[Serusers] SIPPS available for download saturday the 17th!
by Mathias Schupp 30 May '03

30 May '03

Hello, SIPPS, the SIP software client by Ahead Software, creators of Nero-burning Rom, is available as of tomorrow, 17th of May. Feel free to test it and enjoy the following features: - excellent sound quality, even with low bandwidth - call encryption (only between two SIPPS-clients) - easy-to-use, intuitive user interfaces - FREE REGISTRAR SERVER ACCESS - call redirection - call forwarding - conference calls - integrated answering machine with remote access - call recording - compatible with MSN Messenger (placing calls with SIPPS over the buddy-list) - multiple graphical user interfaces (skins) - custom ringing tones - screen names - Test the fully functional demo version for free! You have access to all features for more than two months! Download SIPPS at www.sippstar.com <http://www.sippstar.com/> Enjoy Internet Telephony with SIPPS! Best regards / Mit freundlichen Grüßen Mathias Schupp -------------------------------------------- Mathias Schupp International Sales Manager SIPPS Ahead Software AG phone: +49 (0)7248 911 830 (direct line) Im Stoeckmaedle 18 fax: +49 (0)7248 911 889 76307 Karlsbad mail: <mailto:mschupp@nero.com> mschupp(a)nero.com Germany web: www.sippstar.com <http://www.sippstar.com/> www.nero.com If you reply, please include all previous messages so that we don´t loose the context. Thank you !

5 6

[Serusers] SERAdmin - v.02f Released
by Erik Lagerway 29 May '03

29 May '03

Hi all, SERAdmin v.02f has now been released. SERAdmin is a GUI interface between SIP Express Router (SER) and the SER administrator. Visit http://seradmin.xten.net to find out more about SERAdmin and download the latest build. SERAdmin provides control over many SER tasks such as: start, stop, pause, re-start, monitor, add user, edit user, etc. SERAdmin has an intuitive look and feel. The Xten SERAdmin Team is comprised of 2 senior engineers and 1 project manager who are committed full-time to the development of SERAdmin. SERAdmin is open source, is being developed to benefit all SER administrators, and the feature set of SERAdmin will be determined by the iptel.org SER users' group. So please communicate with the Xten SERAdmin Team, post your comments in the public forums, and make use of the Xten SERAdmin Team as they are working for the SER community. About Xten (www.xten.com) Xten Networks, Inc. is a leading provider of high-quality SIP Voice over Internet Protocol (VoIP) software. Xten provides IP Telephony products directly to end users, the Enterprise market, Next-Gen Service Providers (ITSPs & Tier 2), Wireless Internet Service Providers (WISPs), Telephone Companies (TELCOs), and Original Equipment Manufacturers (OEMs). Cheers, Erik Lagerway, COO erik(a)xten.com

1 0

[Serusers] Problems with locking in timer routine
by Maxim Sobolev 28 May '03

28 May '03

Hi folks, I am having problems with locking in timer routine (ser 0.8.10), particularly with the my recent addition to the nathelper - udp pinger. This piece of code is being invoked periodically by the timer, retrieves list of all currently registered contacts and sends short udp message to each of them. Obviously, routine which retrieves all contacts locks each domain before accessing it, but apparently it doesn't work as expected. Following is the dump of debugging session: -bash-2.05b$ sudo gdb ~/PortaSIP/ser/work/ser-0.8.10/ser ser.core GNU gdb 4.18 (FreeBSD) Copyright 1998 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-unknown-freebsd"...Deprecated bfd_read called at /usr/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxread.c line 2627 in elfstab_build_psymtabs Deprecated bfd_read called at /usr/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxread.c line 933 in fill_symbuf Core was generated by `ser'. Program terminated with signal 11, Segmentation fault. Reading symbols from /usr/lib/libc.so.4...done. Reading symbols from /usr/local/lib/ser/modules/sl.so...done. Reading symbols from /usr/local/lib/ser/modules/tm.so...done. Reading symbols from /usr/local/lib/ser/modules/rr.so...done. Reading symbols from /usr/local/lib/ser/modules/maxfwd.so...done. Reading symbols from /usr/local/lib/ser/modules/usrloc.so...done. Reading symbols from /usr/local/lib/ser/modules/registrar.so...done. Reading symbols from /usr/local/lib/ser/modules/nathelper.so...done. Reading symbols from /usr/local/lib/ser/modules/textops.so...done. Reading symbols from /usr/local/lib/ser/modules/radius_auth.so...done. Reading symbols from /usr/local/lib/libradiusclient.so.0...done. Reading symbols from /usr/lib/libmd.so.2...done. Reading symbols from /usr/lib/libcrypt.so.2...done. Reading symbols from /usr/libexec/ld-elf.so.1...done. #0 0x2a1a62df in get_all_ucontacts (buf=0x80d5248, len=1402) at dlist.c:110 110 if (c->c.len <= 0) (gdb) bt #0 0x2a1a62df in get_all_ucontacts (buf=0x80d5248, len=1402) at dlist.c:110 #1 0x2a1c4b3e in _init () from /usr/local/lib/ser/modules/nathelper.so #2 0x8073679 in timer_ticker () at timer.c:118 #3 0x805e912 in main_loop () at main.c:654 #4 0x80611a1 in main (argc=1, argv=0xbfbffdb8) at main.c:1383 #5 0x804c5a6 in _start () (gdb) print c $1 = (ucontact_t *) 0x460a0d30 (gdb) print *c Cannot access memory at address 0x460a0d30. (gdb) print *r $2 = {domain = 0x282ec0d8, aor = {s = 0x282f4638 "011801", len = 6}, contacts = 0x282f5cb8, slot = 0x282ed418, d_ll = { prev = 0x282ef0d8, next = 0x0}, s_ll = {prev = 0x0, next = 0x0}} (gdb) print *r->contacts $3 = {domain = 0x7a3d6863, aor = 0x34476839, c = {s = 0x37364b62 <Address 0x37364b62 out of bounds>, len = 959328819}, expires = 825243494, q = 2.12359957e+20, callid = {s = 0x32663238 <Address 0x32663238 out of bounds>, len = 1714774885}, cseq = 1631019574, state = 1631020084, user_agent = {s = 0x62386438 <Address 0x62386438 out of bounds>, len = 775107636}, next = 0x460a0d30, prev = 0x3a6d6f72} (gdb) print *r->contacts->next Cannot access memory at address 0x460a0d30. (gdb) l 100 95 void *cp; 96 int shortage; 97 98 cp = buf; 99 shortage = 0; 100 /* Reserve space for terminating 0000 */ 101 len -= sizeof(c->c.len); 102 for (p = root; p != NULL; p = p->next) { 103 lock_udomain(p->d); 104 if (p->d->d_ll.n <= 0) { (gdb) l 105 unlock_udomain(p->d); 106 continue; 107 } 108 for (r = p->d->d_ll.first; r != NULL; r = r->d_ll.next) { 109 for (c = r->contacts; c != NULL; c = c->next) { 110 if (c->c.len <= 0) 111 continue; 112 if (len >= (int)(sizeof(c->c.len) + c->c.len)) { 113 memcpy(cp, &c->c.len, sizeof(c->c.len)); 114 cp += sizeof(c->c.len); As you can see, we are locked domain in question (line 103), but still, found one of records to be in the inconsistent state (contacts aren't initialized). Does anyone have any ideas about what could be wrong with this? I an seeing similar problem in the code that periodically expires contacts. -Maxim

2 1

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

sr-users May 2003