Configuring SIP Trunk with Freeswitch

Created by Daniel Kauffer, Modified on Mon, 24 Feb at 3:40 PM by Daniel Kauffer

Configuring Freeswitch for Megacall.

Key to the information which appears in the example:

111111: Your SIP number from your personal account.
Password: Your password of the SIP number from the section "SIP Connection" personal account.
1000: Freeswitch extension number that connects to the softphone / ip-phone, to receive incoming calls and make outgoing calls.

1. Create a file /etc/freeswitch/sip_profiles/external/megacall.xml

<include>
    <gateway name="zadarma">
        <param name="username" value="111111"/>
        <param name="password" value="Password"/>
        <param name="realm" value="sip.zadarma.com"/>
        <param name="from-user" value="111111"/>
        <param name="from-domain" value="sip.zadarma.com"/>
        <param name="proxy" value="sip.zadarma.com"/>
        <param name="expire-seconds" value="300"/>
        <param name="register" value="true"/>
        <param name="register-transport" value="udp"/>
        <param name="context" value="zadarma"/>
    </gateway>
</include>

2. Create a configuration file Dialplan /etc/freeswitch/dialplan/megacall.xml

<?xml version="1.0" encoding="UTF-8"?>
<include>
    <context name="megacall">
        <extension name="unloop">
            <condition field="$${unroll_loops}" expression="^true$" />
            <condition field="${sip_looped_call}" expression="^true$">
                <action application="deflect" data="${destination_number}" />
            </condition>
        </extension>
        <extension name="in-megacall">
            <condition field="destination_number" expression="^(111111)$">
                <action application="bridge" data="user/1000@$${domain}"/>
                <action application="hangup"/>
            </condition>
        </extension>
        <extension name="out-megacall">
            <condition field="destination_number" expression="^(\d{10,15})$">
                <action application="bridge" data="sofia/gateway/megacall/$1"/>
                <action application="hangup"/>
            </condition>
        </extension>
        <extension name="local">
            <condition field="destination_number" expression="^\d{4}$">
                <action application="answer" />
                <action application="sleep" data="1000" />
                <action application="bridge" data="user/${destination_number}@$${domain}" />
                <action application="hangup" />
            </condition>
        </extension>
    </context>
</include>

3. Create a Freeswitch extension number that connects to the softphone / ip-phone to receive incoming calls and make outgoing calls. Edit the file /etc/freeswitch/directory/default/1000.xml

<include>
    <user id="1000">
        <params>
            <param name="password" value="your_hard_pasword"/>
            <param name="vm-password" value="1000"/>
        </params>
        <variables>
            <variable name="toll_allow" value="domestic,international,local"/>
            <variable name="accountcode" value="1000"/>
            <variable name="user_context" value="megacall"/>
            <variable name="effective_caller_id_name" value="Extension 1000"/>
            <variable name="effective_caller_id_number" value="1000"/>
            <variable name="outbound_caller_id_name" value="$${outbound_caller_name}"/>
            <variable name="outbound_caller_id_number" value="$${outbound_caller_id}"/>
            <variable name="callgroup" value="techsupport"/>
        </variables>
    </user>
</include>

To reload XML execute the console command: fs_cli reloadxml

The configuration is complete.