It is not kamailio manage thing. It is end to end Negotiation. In other words it should be placed by UAc to another UAc.

Not by sip-proxy

On Tue, 17 Dec 2019, 19:52 Anuran Barman, <anuranbarman@gmail.com> wrote:

Thanks for the reply. Sharing doc links of Session timer settings related to Kamailio specifically will be greatly appreciated.

On Wed, 18 Dec 2019 at 12:18 AM, Yuriy Gorlichenko <ovoshlook@gmail.com> wrote:

Session-Expires header ( Just remembered right name) will help you

See rfc 4028

https://tools.ietf.org/html/rfc4028#page-6

On Tue, 17 Dec 2019, 19:44 Yuriy Gorlichenko, <ovoshlook@gmail.com> wrote:

Hi. It is no a kamailio question but sip question itself. You can manage how often te invite will be by using session-timers. It will help you to setup time range between reInvite ir whatever message you will use as keepalive

On Tue, 17 Dec 2019, 19:34 Anuran Barman, <anuranbarman@gmail.com> wrote:

Hi, I am using Kamailio for my SIP Phone app. My main SIP client is the iOS app. Till now everything is working fine regarding the calling. But the problem is when the app is killed I am not able to pick up incoming call. The thing is, when app is killed I am sending PushKit VOIP message to my ios app to wake it up. App is waking up. But by the time app is waking up, the original INVITE message got missed up. So according to SIP protocol it will re-INVITE after some time. Currently if I keep my app open for 10-15 secs after it wakes up, I am able to get the re-INVITE and everything works fine just as it was supposed to. But waiting 10-15 sec on the app is not practical in any sense.

So my question is there any way I can reduce the re-INVITE time to like 5/6 seconds so that as soon as the app open it will wait for 5/6 seconds (practical upto some extent) and it will get the call ? Or what kamailio is using as the interval time is a SIP standard and can not be changed? If possible to do so, how can I do that? Please help.

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