Alex Initially I did not put dlg_manage(), after reading your post I added the dlg_manage(). Now in route section my code in kamailio.config looks as below. * dlg_manage(); if (is_method("INVITE")) { if (!has_totag()) { if($DLG_count > 1) { sl_send_reply("503","RESOURCE UNAVAILABLE"); exit; } else { setflag(FLD_DLG); xlog("Dialog count = $DLG_count\n"); } } * The end result still remains same. The DLG_count still shows as 0 irrespective of number of calls present in system. Can somebody points whats wrong I am doing here. Regards, Austin On Sat, Oct 29, 2011 at 8:58 AM, Alex Balashov <abalashov(a)evaristesys.com>wrote;wrote:

Have you tried using dialog profiles instead of $DLG_count? -- Alex Balashov - Principal Evariste Systems LLC 260 Peachtree Street NW Suite 2200 Atlanta, GA 30303 Tel: +1-678-954-0670 Fax: +1-404-961-1892 Web: http://www.evaristesys.com/

Thanks Andrew I added profile_with_value module parameter and with that I am able to overcome this error. My code looks as below. dlg_manage(); if (is_method("INVITE")) { if (!has_totag()) { #$var(SIZE) = 0; get_profile_size("caller", "$fu", "$var(SIZE)"); xlog("Number of calls present now is $var(SIZE)\n"); if( $var(SIZE) > MAX_NUMBER_OF_CALLS ) { sl_send_reply("503", "Simultaneous calls limit reached"); xlog("Rejected calls with 503 Simultaneous calls limit reached\n"); exit; } else { xlog("Allowed call. Looks max calls limit not reached. Calls= $var(SIZE)\n"); } set_dlg_profile("caller","$fu"); } } Whole purpose is to limit number of active calls at any point of time. $var(SIZE) gives the number of calls are being established, but not the number of calls are already established. So if I am making multiple calls at a point of time, it is blocking call attempts beyond limit. But after all call setup complete, again $var(SIZE) becomes zero and allows new calls. Has anybody done this (limiting number of calls at any point of time). If so can you please share the configuration file changes. To get $var(SIZE) working properly, do I need to enable MySql, please advice. Regards Austin On Sun, Oct 30, 2011 at 12:28 PM, Andrew Pogrebennyk < apogrebennyk(a)sipwise.com&gt; wrote:

Dear Andrew, Henning Thanks for sharing very useful information. I am bit new to kamailio, probably askingvery easy questions, please bear with me. I am not sure if I am forwording the INVITE statelessly or not. How do I check if INVITE is forwarded statelessly. Andrew you have mentioned 'So make sure that a transaction exists or create it explicitly using the tm module". Not sure, how do I check if transaction exists or not. And how can I create it. Please give me some pointers or a sample config file. Regards, Austin On Mon, Oct 31, 2011 at 4:37 PM, Andrew Pogrebennyk < apogrebennyk(a)sipwise.com&gt; wrote:

Austin, Actually you could share your config to the mailing list, I will tell you if there is something blatantly wrong ;-) Regards, Andrew On 11/03/2011 06:15 AM, Jason Penton wrote:

Austin, the block beginning with dlg_manage() should be placed between route(AUTH) and route(PSTN). It is commented out and put outside the main routing block so I'm not sure if that was the case.. If the problem persists please get the dialogs list before calling, while the callee's phone is ringing after the call is established and after the call is cleared. If I am not mistaken the command is: kamctl fifo profile_list_dlgs caller On 11/05/2011 03:02 AM, Austin Einter wrote: