Right, apparently the incoming trunk sends a CANCEL request approx 20secs after the initial INVITE, i suppose because the kamailio subscriber is not answering, so the flow in my logs is normal.
I should now rephrase my question and ask if there is a way to forward calls that are not answered - is there a timer for this? can you please point me to any direction?

Regards, 

Konstantinos

On 8 Nov 2019, at 1:19 PM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:


On 08.11.19 11:52, Konstantinos Merentitis wrote:
I added $du=$null; before route(RELAY) as you suggested but I get the same results:

Nov  8 12:40:22 spock /usr/sbin/kamailio[21826]: ERROR: <script>: transaction canceled

The log message suggests that the INVITE was cancelled -- can you look
at the sip traffic and see if there is a CANCEL request received from
caller UA? If yes, the transaction was terminated and cannot be re-routed.

Cheers,
Daniel


Nov  8 12:40:22 spock /usr/sbin/kamailio[21826]: ERROR: <script>: #012 RDNIS = sip:297@192.168.1.134 
Nov  8 12:40:22 spock /usr/sbin/kamailio[21826]: ERROR: <script>: =============forwarding to voicemail1, RDNIS: sip:297@192.168.1.134  =========== 
Nov  8 12:40:22 spock /usr/sbin/kamailio[21826]: ERROR: tm [tm.c:1679]: _w_t_relay_to(): t_forward_noack failed
Nov  8 12:40:22 spock /usr/sbin/kamailio[21826]: ERROR: sl [sl_funcs.c:392]: sl_reply_error(): stateless error reply used: transaction canceled (487/SL)

Regards, 

Konstantinos

On Fri Nov 8 10:24:06 CET 2019 Daniel Tryba wrote:

On Thu, Nov 07, 2019 at 04:53:43PM +0200, Konstantinos Merentitis wrote: 

I tried to modify the failure route in order to also forward not answered (failed?) calls to asterisk mailbox but i get the following error and the call is never forwarded:

You appear to do the same thing I do, except setting $du to null. If the user is REGISTERed $du will be set to their endpoint, changing $ru will have no effect on routing. So add $du=$null; in the TOVOICEMAIL route before route(RELAY) and see what happens. 

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