connector-telephony/connector_voicent/data/ir_cron.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <record id="fetch_check_the_voicent_status" model="ir.cron">
        <field name="name">Voicent: Update the next call</field>
        <field name="model_id" ref="model_backend_voicent"/>
        <field eval="True" name="active"/>
        <field name="user_id" ref="base.user_root"/>
        <field name="interval_number">15</field>
        <field name="interval_type">minutes</field>
        <field name="numbercall">-1</field>
        <field eval="False" name="doall"/>
        <field name="state">code</field>
        <field name="code">model._run_update_next_call()</field>
    </record>

</odoo>