<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi,<div class=""><br class=""></div><div class="">why do you lost a call? Are you sending 100 Trying before you put transaction to TSILO?<br class=""><div class=""><br class="webkit-block-placeholder"></div><div class="">
<div style="caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: Verdana; color: rgb(12, 12, 24);" class=""><span style="-webkit-font-kerning: none;" class="">Bye,<br class="Apple-interchange-newline">Michal Popovič</span></div><div style="caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Verdana; color: rgb(102, 102, 102);" class=""><br class=""></div>
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<div><br class=""><blockquote type="cite" class=""><div class="">On 22 Apr 2020, at 07:58, German Cancio <<a href="mailto:German.Cancio.Melia@cern.ch" class="">German.Cancio.Melia@cern.ch</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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<span class="" style="font-family: Menlo-Regular; font-size: 11px;">Dear All,</span><br class="" style="font-family: Menlo-Regular; font-size: 11px;">
<br class="" style="font-family: Menlo-Regular; font-size: 11px;">
<span class="" style="font-family: Menlo-Regular; font-size: 11px;">we are working on the integration of VoIP Push Notifications with iOS devices via Kamailio. From what we observe, the time window between receiving a VoIP APNS notification that wakes up the
client app and the client app being sent back to the background by iOS is extremely narrow. It is around 1-2 seconds, with a (seemingly random) variance of say ~0.5s. </span><br class="" style="font-family: Menlo-Regular; font-size: 11px;">
<span class="" style="font-family: Menlo-Regular; font-size: 11px;">So 1-2s is the time window available for getting the client app to properly REGISTER and to receive the INVITE back from Kamailio (using e.g. TSILO); otherwise the call is lost. (On Android,
the equivalent time window extends to 10s or more.) </span><br class="" style="font-family: Menlo-Regular; font-size: 11px;">
<br class="" style="font-family: Menlo-Regular; font-size: 11px;">
<span class="" style="font-family: Menlo-Regular; font-size: 11px;">Have others observed the same on iOS? We are using a client app that still uses the iOS 12 SDK (with Xcode10). Can we expect changes in that regard with iOS13/Xcode13?</span><br class="" style="font-family: Menlo-Regular; font-size: 11px;">
<br class="" style="font-family: Menlo-Regular; font-size: 11px;">
<span class="" style="font-family: Menlo-Regular; font-size: 11px;">many thanks and cheers, Germán</span>
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