sr-users October 2011

sr-users@lists.kamailio.org

69 participants
117 discussions

Consulting needed
by Pete Ashdown 14 May '12

14 May '12

I have been trying to accomplish a couple tasks with Kamailio over the past month with no luck. What I need is a bit of one-on-one training with someone who knows the lay of the land. If you do this kind of consulting and can use Skype with possibly a shared-screen terminal, please drop me an email with your rate.

4 5

best way to start kamailio at boot
by Uri Shacked 01 Feb '12

01 Feb '12

Hi, what is the best way to start kamailio at boot? the example in the install is not working for me....

5 9

carrierroute issue with rewrite host
by Uri Shacked 21 Dec '11

21 Dec '11

Hi, I am using kamailio (only one) as routing engine. I have 2 gateways. Both of them sending calls to kamailio. When i use the carrierroute module i need to change (and succeed) the user ($rU). But, i need to send the call (the invite) back to the gateway that sent me the call from the beginning (it can be either one of those 2). So, my problem is that i don’t want to rewrite the host in carrierroute, just the user. If i leave the rewrite_host field empty, it is considered to be "black list" and drops the call. If i rewrite the host, i can send the call to the second gateway that was not the one that sent the call, and the call drops as well. any ideas how to use carrierroute for changing user only and send the invite back to the gateway that originally sent the call? Thanks, Uri

3 2

Presence Dialog not being created
by Gnaneshwar Gatla 08 Dec '11

08 Dec '11

Hello, Kamailio version: 3.1.5 I have been trying to use presence for Event:Dialog. I have used PUA_Dialoginfo module to accomplish this task. The PUA_dialoginfo module states that if "override_lifetime" is not used, the value of the expires is taken from dialog module. I have tried the module without the "override_lifetime" which did not create the dialog in the presentity. When used debug, I did see the xml being generated but finds the dialog "expires=0" and deletes the xml(please find the log below). But when "override_lifetime" is set, the dialog in the presentity table is set until. But this has a problem, modparam("pua_dialoginfo", "override_lifetime", 300) 1. if a call is still going on more than the override_lifetime the presentity is deleted. 2. the presentity information is available until the "override_lifetime" even after the call is hung-up. How do I get this module working without the "override_lifetime" being used. The Log: Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua_dialoginfo [dialog_publish.c:242]: new_body:#012<?xml version="1.0"?>#012<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="0" state="full" entity="sip:user@mydemo.com">#012 <dialog id="112014dff048e71e" call-id="112014dff048e71e" direction="initiator">#012 <state>Trying</state>#012 <remote>#012 <identity>sip:user01@mydemo.com</identity>#012 <target uri="sip:user01@mydemo.com"/>#012 </remote>#012 <local>#012 <identity>sip:user@mydemo.com</identity>#012 <target uri="sip:user@mydemo.com"/>#012 </local>#012 </dialog>#012</dialog-info>#012 Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: DEBUG: <core> [db_res.c:81]: freeing 1 columns Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua_dialoginfo [dialog_publish.c:290]: publish uri= sip:user@mydemo.com Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: DEBUG: <core> [db_res.c:85]: freeing RES_NAMES[0] at 0x8314aa4 Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: <core> [mem/q_malloc.c:366]: qm_malloc(0x829bee0, 756) called from pua_dialoginfo: dialog_publish.c: dialog_publish(302) Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: <core> [mem/q_malloc.c:428]: qm_free(0x829bee0, 0x8314aa4), called from <core>: db_res.c: db_free_columns(86) Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: <core> [mem/q_malloc.c:406]: qm_malloc(0x829bee0, 756) returns address 0x82e84bc frag. 0x82e84a4 (size=900) on 1 -th hit Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: <core> [mem/q_malloc.c:450]: qm_free: freeing frag. 0x8314a8c alloc'ed from db_mysql: km_res.c: db_mysql_get_columns(78) Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua_dialoginfo [dialog_publish.c:51]: publ: Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: DEBUG: <core> [db_res.c:94]: freeing result names at 0x8318650 Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua_dialoginfo [dialog_publish.c:52]: uri= sip:user@mydemo.com Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: <core> [mem/q_malloc.c:428]: qm_free(0x829bee0, 0x8318650), called from <core>: db_res.c: db_free_columns(95) Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua_dialoginfo [dialog_publish.c:53]: id= DIALOG_PUBLISH.112014dff048e71e Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: <core> [mem/q_malloc.c:450]: qm_free: freeing frag. 0x8318638 alloc'ed from <core>: db_res.c: db_allocate_columns(148) Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua_dialoginfo [dialog_publish.c:54]: expires= 0 Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: DEBUG: <core> [db_res.c:99]: freeing result types at 0x8318684 Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua [send_publish.c:403]: pres_uri=sip:user@mydemo.com Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: <core> [mem/q_malloc.c:428]: qm_free(0x829bee0, 0x8318684), called from <core>: db_res.c: db_free_columns(100) Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua [hash.c:121]: core_hash= 504 Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: <core> [mem/q_malloc.c:450]: qm_free: freeing frag. 0x831866c alloc'ed from <core>: db_res.c: db_allocate_columns(157) Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua [hash.c:171]: record not found Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: DEBUG: <core> [db_res.c:54]: freeing 1 rows Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua [send_publish.c:444]: insert type Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: DEBUG: <core> [db_row.c:97]: freeing row values at 0x8314b14 Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua [send_publish.c:448]: UPDATE_TYPE and no record found Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: <core> [mem/q_malloc.c:428]: qm_free(0x829bee0, 0x8314b14), called from <core>: db_row.c: db_free_row(98) Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: DEBUG: pua [send_publish.c:454]: request for a publish with expires 0 and no record found Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: <core> [mem/q_malloc.c:450]: qm_free: freeing frag. 0x8314afc alloc'ed from <core>: db_row.c: db_allocate_row(114) Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3289]: <core> [mem/q_malloc.c:428]: qm_free(0x829bee0, 0x82e84bc), called from pua_dialoginfo: dialog_publish.c: dialog_publish(357) Oct 21 12:12:46 SIPTest /usr/local/sbin/kamailio[3288]: DEBUG: <core> [db_res.c:62]: freeing rows at 0x8314adc Regards Gnaneshwar

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[Kamailio-Users] Converting rtpproxy recorded .rtp file to .wav file
by Vikram Ragukumar 18 Nov '11

18 Nov '11

Hello, I used Kamailio+rtpproxy to record a session and rtpproxy outputs the following files long_file_name.a.rtp, long_file_name.a.rtcp, long_file_name.o.rtp, long_file_name.o.rtcp http://www.rtpproxy.org/wiki/RTPproxy/FAQ From the Rtpproxy FAQ above, i tried to extract the audio using rtpbreak and sox. rtpbreak -W -r long_file_name.a.rtp rtpbreak -W -r long_file_name.o.rtp The above commands generate rtp.0.0.raw, rtp.1.0.raw. Then when i run sox using sox --combine merge -r 8k -A rtp.0.0.raw -r 8k -A rtp.1.0.raw -t wavpcm -s out.wav i get the following errors : sox: invalid option -- - sox: -c must be given a number Is there a switch/anything else that i am missing ? Thanks in advance, Regards, Vikram.

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How to limit number of calls in Kamailio proxy
by Austin Einter 10 Nov '11

10 Nov '11

This is continuation with limiting number of calls per Kamailio proxy server. I modified kamailio.cfg as below. 1. loadmodule "dialog.so" 2. modparam("dialog", "enable_stats", 1) 3. modparam("dialog", "dlg_flag", 4) Next, as dialog module I can use either active_dialogs() or $DLG_count to find number of calls present at any given point of time. However if I use active_dialogs() I get parse error when I run kamailio proxy. Next I used $DLG_count , but always I am getting value of $DLG_count as 0. In *route* section, I added code as below. if (is_method("INVITE")) { if($DLG_count > 1) { sl_send_reply("503","RESOURCE UNAVAILABLE"); exit; } else { xlog("Dialog count = $DLG_count\n"); } } Everytime a new call starts , it prints $DLG_count as 0. Kindly let me know whats going wrong here. Regards Austin

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Dispatcher Confusion (v3.2.0)
by Asgaroth 03 Nov '11

03 Nov '11

Hi All, Just been doing some testing with Kamailio 3.2 and the dispatcher module, and have some strange behaviour, can we confirm if it is expected behaviour or a bug of some sort. It appears that I can only set the dspatcher state via fifo command once, and not reset it again, here is an example: version: kamailio 3.2.0 (i386/linux) 94d3b8 flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, DBG_QM_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 4MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: 94d3b8 compiled on 12:34:43 Oct 20 2011 with gcc 4.1.2 Here we start with the dispatcher list as it was pulled from the database and currently loaded in memory. # kamctl dispatcher dump SET_NO:: 2 SET:: 1 URI:: sip:1.1.1.1:10001 flags=AX priority=0 attrs= URI:: sip:1.1.1.1:10000 flags=AX priority=0 attrs= SET:: 2 URI:: sip:1.1.1.1:10003 flags=AX priority=0 attrs= URI:: sip:1.1.1.1:10002 flags=AX priority=0 attrs= Now I try to set one gateway inactive: # kamctl fifo ds_set_state i 1 sip:1.1.1.1:10001 # kamctl dispatcher dump SET_NO:: 2 SET:: 1 URI:: sip:1.1.1.1:10001 flags=IX priority=0 attrs= URI:: sip:1.1.1.1:10000 flags=AX priority=0 attrs= SET:: 2 URI:: sip:1.1.1.1:10003 flags=AX priority=0 attrs= URI:: sip:1.1.1.1:10002 flags=AX priority=0 attrs= All normal so far, now if I try to set the same gateway active again, the state still stays inactive, i dont seem to be able to change the state back to active. The same thing happens if I attempt to set this state to disabled and then try to set it back to active afterwards. The state does not change from what the first attempt was. # kamctl fifo ds_set_state a 1 sip:1.1.1.1:10001 # kamctl dispatcher dump SET_NO:: 2 SET:: 1 URI:: sip:1.1.1.1:10001 flags=IX priority=0 attrs= URI:: sip:1.1.1.1:10000 flags=AX priority=0 attrs= SET:: 2 URI:: sip:1.1.1.1:10003 flags=AX priority=0 attrs= URI:: sip:1.1.1.1:10002 flags=AX priority=0 attrs= Now I can try to set the state to inactive probing, that works. # kamctl fifo ds_set_state ip 1 sip:1.1.1.1:10001 # kamctl dispatcher dump SET_NO:: 2 SET:: 1 URI:: sip:1.1.1.1:10001 flags=IP priority=0 attrs= URI:: sip:1.1.1.1:10000 flags=AX priority=0 attrs= SET:: 2 URI:: sip:1.1.1.1:10003 flags=AX priority=0 attrs= URI:: sip:1.1.1.1:10002 flags=AX priority=0 attrs= Now if I try to disable the same destination: # kamctl fifo ds_set_state d 1 sip:1.1.1.1:10001 # kamctl dispatcher dump SET_NO:: 2 SET:: 1 URI:: sip:1.1.1.1:10001 flags=IP priority=0 attrs= URI:: sip:1.1.1.1:10000 flags=AX priority=0 attrs= SET:: 2 URI:: sip:1.1.1.1:10003 flags=AX priority=0 attrs= URI:: sip:1.1.1.1:10002 flags=AX priority=0 attrs= State still stays in Inactive/Probing mode. Now if I try to set the same gateway to active/probing mode, I cant: # kamctl fifo ds_set_state ap 1 sip:1.1.1.1:10001 # kamctl dispatcher dump SET_NO:: 2 SET:: 1 URI:: sip:1.1.1.1:10001 flags=IP priority=0 attrs= URI:: sip:1.1.1.1:10000 flags=AX priority=0 attrs= SET:: 2 URI:: sip:1.1.1.1:10003 flags=AX priority=0 attrs= URI:: sip:1.1.1.1:10002 flags=AX priority=0 attrs= The only way for me to get the state back to active after the above is to do a reload on the dispatch table: # kamctl dispatcher reload # kamctl dispatcher dump SET_NO:: 2 SET:: 1 URI:: sip:1.1.1.1:10001 flags=AX priority=0 attrs= URI:: sip:1.1.1.1:10000 flags=AX priority=0 attrs= SET:: 2 URI:: sip:1.1.1.1:10003 flags=AX priority=0 attrs= URI:: sip:1.1.1.1:10002 flags=AX priority=0 attrs= Is the dispatcher expected to behave as above? I'm still trying to understand the different states assuming the following options are set in the configuration file: modparam("dispatcher", "ds_ping_interval", 10) modparam("dispatcher", "ds_probing_threshhold", 1) modparam("dispatcher", "ds_probing_mode", 0) AX = Active/No Probing (*) Gateway is used in ds_select_*, ds_next_* (*) No OPTIONS/INFO messages are sent to destination to check alive state This appears to be the normal operating state with no issues detected. AP = Active/Probing (*) Gateway is NOT used in ds_select_*, ds_next_* (*) OPTIONS/INFO messages ARE sent to destination to check alive state This appears to be the state taken when a gateway times out and ds_mark_dst("p") is set in failure route, the gateway is "pinged" while down and set into AX mode once a response is recieved. IX = Inactive/No Probing (*) Gateway is NOT used in ds_select_*, ds_next_* (*) No OPTIONS/INFO messages sent to destination This appears to be the state taken when a gateway times out and if ds_mark_dst("i") is set in failure route, this gateway is set inactive and no "pinging" is performed. IP = Inactive/Probing (*) Gateway is NOT used in ds_select_*, ds_next_* (*) OPTIONS/INFO messages ARE sent to destination I'm not sure when this state would be reached unless it is set by fifo command. The ds_mark_dst function only allows "a","i" or "p". So the probing method would only become active is ds_probing_mode = 1. In my case it is 0, so I'm not sure if I would ever reach this state unless I forced it. What would happen here is the gateway came back alive once in "IP" state, would it go back to "AX" state? DX = Disabled/No Probing (*) Gateway is administratively set to down This is where manual intervention has occured and the destination has been set to administrativly down, for example, work being carried out on the destination gateway. All these states make sense, for the most part, I'm a little unsure of how IP/IX is meant to work unless you manually set it to "inactive" in your failure route. The main concern though is the the fifo commands dont appear to be working as expected, I can only set the state for a destination manually once, and not again after that, unless I perform a dispatcher reload. Has anyone else experienced this behaviour? Any comments/suggestions explanations are most welcome. Thanks

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Kamailio3.2 debian repo fails
by Benjamin Henrion 02 Nov '11

02 Nov '11

Hi, I have the following /etc/apt/sources.list: ======================================================== $ cat /etc/apt/sources.list deb http://ftp.debian.org/debian squeeze main contrib non-free deb-src http://ftp.debian.org/debian squeeze main contrib non-free deb http://deb.kamailio.org/kamailio32 squeeze main deb-src http://deb.kamailio.org/kamailio32 squeeze main ======================================================== Which generates the following error: ======================================================== $ apt-get update Ign http://deb.kamailio.org squeeze Release.gpg Ign http://deb.kamailio.org/kamailio32/ squeeze/main Translation-en Ign http://deb.kamailio.org/kamailio32/ squeeze/main Translation-en_US Ign http://deb.kamailio.org/kamailio32/ squeeze/main Translation-en_US.UTF-8 Ign http://deb.kamailio.org squeeze Release Ign http://deb.kamailio.org squeeze/main Sources Hit http://ftp.debian.org squeeze Release.gpg Ign http://ftp.debian.org/debian/ squeeze/contrib Translation-en Ign http://ftp.debian.org/debian/ squeeze/contrib Translation-en_US Ign http://deb.kamailio.org squeeze/main amd64 Packages Ign http://deb.kamailio.org squeeze/main Sources Ign http://ftp.debian.org/debian/ squeeze/contrib Translation-en_US.UTF-8 Ign http://ftp.debian.org/debian/ squeeze/main Translation-en Ign http://ftp.debian.org/debian/ squeeze/main Translation-en_US Ign http://ftp.debian.org/debian/ squeeze/main Translation-en_US.UTF-8 Ign http://ftp.debian.org/debian/ squeeze/non-free Translation-en Ign http://ftp.debian.org/debian/ squeeze/non-free Translation-en_US Ign http://ftp.debian.org/debian/ squeeze/non-free Translation-en_US.UTF-8 Hit http://ftp.debian.org squeeze Release Ign http://deb.kamailio.org squeeze/main amd64 Packages Err http://deb.kamailio.org squeeze/main Sources 404 Not Found Err http://deb.kamailio.org squeeze/main amd64 Packages 404 Not Found Hit http://ftp.debian.org squeeze/main Sources Hit http://ftp.debian.org squeeze/contrib Sources Hit http://ftp.debian.org squeeze/non-free Sources Hit http://ftp.debian.org squeeze/main amd64 Packages Hit http://ftp.debian.org squeeze/contrib amd64 Packages Hit http://ftp.debian.org squeeze/non-free amd64 Packages W: Failed to fetch http://deb.kamailio.org/kamailio32/dists/squeeze/main/source/Sources.gz 404 Not Found W: Failed to fetch http://deb.kamailio.org/kamailio32/dists/squeeze/main/binary-amd64/Packages… 404 Not Found E: Some index files failed to download, they have been ignored, or old ones used instead. ======================================================== Who is responsible for the debian packaging? Best, -- Benjamin Henrion <bhenrion at ffii.org> FFII Brussels - +32-484-566109 - +32-2-4148403 "In July 2005, after several failed attempts to legalise software patents in Europe, the patent establishment changed its strategy. Instead of explicitly seeking to sanction the patentability of software, they are now seeking to create a central European patent court, which would establish and enforce patentability rules in their favor, without any possibility of correction by competing courts or democratically elected legislators."

3 6

sdpops and dynamic codec ids
by Juha Heinanen 01 Nov '11

01 Nov '11

i made call sdp_keep_codecs_by_name("PCMU,PCMA,speex"); on an invite request and it didn't keep speex although it was in the sdp: Session Description Protocol Session Description Protocol Version (v): 0 Owner/Creator, Session Id (o): sems 1 1 IN IP4 192.98.102.10 Session Name (s): sems Connection Information (c): IN IP4 192.98.102.10 Time Description, active time (t): 0 0 Media Description, name and address (m): audio 40000 RTP/AVP 101 102 8 0 3 2 9 96 97 98 99 100 Media Attribute (a): rtpmap:101 iLBC/8000 Media Attribute (a): rtpmap:102 speex/8000 Media Attribute (a): rtpmap:8 PCMA/8000 Media Attribute (a): rtpmap:0 PCMU/8000 Media Attribute (a): rtpmap:3 GSM/8000 Media Attribute (a): rtpmap:2 G721/8000 Media Attribute (a): rtpmap:9 g722/8000 Media Attribute (a): rtpmap:96 telephone-event/8000 Media Attribute (a): rtpmap:97 G726-32/8000 Media Attribute (a): rtpmap:98 G726-24/8000 Media Attribute (a): rtpmap:99 G726-40/8000 Media Attribute (a): rtpmap:100 G726-16/8000 it is so that sdpops module does not support codecs, whose ids are dynamic, but only codecs with static ids? -- juha

2 14

enabling app_python module in Kamailio
by Muhammad Nasir Bhutta 01 Nov '11

01 Nov '11

Hi, I am trying to enable the app_python module in Kamailio to run a simple python script externally parallel with Kamailio proxy, While I try to load the module "app_python.so" in configuration file, the Kamailio server fails to start.. I can't see what is the problem .. The steps, I am following are that: - Script written in python saved in home directory. - Loadmodule "app_python.so" statement in configuration file. - Modparam("app_python", "script_name", "location of script") - Python_exec("function", "parameters list") .. I have also tried to check the Kamailio configuration option, It gives following warning, 0(2942) WARNING: <core> [sr_module.c:584]: /usr/local/lib64/kamailio/modules/app_python.so: exports dlflags interface is deprecated and it will not be supported in newer versions; consider using mod_register() instead I am wandering if any one can please help in this matter, I shall be very thankful .. With many thanks .. Kind Regards, Nasir Muhammad Nasir Bhutta Solutions Architect Britannic Technologies Ltd t: +44 1483 544812 f: +44 845 0501001 mbhutta(a)btlnet.co.uk<mailto:mbhutta@btlnet.co.uk> www.btlnet.co.uk<http://www.btlnet.co.uk> [cid:image001.jpg@01CC881F.1EA78300]<http://www.linkedin.com/company/britannic-technologies/products>[cid:image002.jpg@01CC881F.1EA78300]<http://www.twitter.com/BritannicTech>[cid:image003.jpg@01CC881F.1EA78300]<http://www.facebook.com/pages/Britannic-Technologies/202957249732198>[cid:image004.jpg@01CC881F.1EA78300]<http://www.youtube.com/user/BritannicTech> ________________________________ [cid:image007.jpg@01CC881F.4A995BF0]<http://www.btlnet.co.uk/> Watch the Telegraph Business Club video about Britannic at our educational TV site - britannictech.tv<http://britannictech.tv> Our 8th Annual Convergence Summit is being held at Silverstone on 17th November 2011. Book your place now<http://www.btlnet.co.uk/news--events/2011/convergence-summit-2011/register> and discover the world of Hosting and Cloud Services. ________________________________ This email and any files transmitted with it are confidential and intended for the addressee only. If you are not the intended recipient please notify the sender and delete this email. The views expressed in this email are personal, and do not constitute a commitment by Britannic Technologies Ltd unless specified by a separate, written agreement. Registered Office: Britannic House, Merrow Business Park, Guildford, Surrey GU4 7WA. Registered in England no. 2090797. ________________________________

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sr-users October 2011