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Last update: 16 March 2010

 Click to expand Table of Contents

Neotel.co.za

Neotel requires you connect directly into their network. The configuration described below is based on a standard FreeSWITCH installation on a dual homed server.

IP addressing & DDI info

IN.IN.IN.IN - represents your internal NIC (LAN) IP address e.g. 10.0.2.185

EX.EX.EX.EX - represents your external NIC (WAN) IP address – this will be supplied to you by Neotel

SP.SP.SP.SP - represents the IP address of Neotel’s SIP server - this will be supplied to you by Neotel

DG.DG.DG.DG - represents the default gateway - supplied by Neotel

nnnnnnnnnn - represents a 10 digit telephone number (DID), from the range supplied to you by Neotel

Server configuration

This FS installation was done using an HP desktop with the following config:

• Windows Server 2008 SP1 • 2 GB RAM • Intel Core 2 Duo (E7400) 2.8GHZ • 150GB HDD • 2 x NICs

Network Configuration

For simplicity, turn off all firewall services on your FS server.


Setup your NICs as follows:

NIC 1 (LAN) • IP address: IN.IN.IN.IN /255.255.255.0 • No default gateway

NIC 2 (Neotel) • IP address: EX.EX.EX.EX / MASK (Supplied by Neotel) • Default gateway: DG.DG.DG.DG (Supplied by Neotel)

 

Test you can successfully PING the SIP Server (SP.SP.SP.SP)

Recommend you install Wireshark and run traces on your NICs to confirm that traffic is flowing.

Install FreeSWITCH

Download and install latest version of FreeSWITCH.

Recommend you make a backup copy of the FreeSWITCH\conf folder, in case you need to revert back to a clean config

Configure FreeSWITCH

All configuration is done in the FreeSWITCH\conf folder and subfolders

Modify vars.xml

Domain IP

Change: 
<X-PRE-PROCESS cmd="set" data="domain=$${local_ip_v4}"/>

To: 
<X-PRE-PROCESS cmd="set" data="domain=IN.IN.IN.IN"/>

Swap internal & external ports

Change:
<X-PRE-PROCESS cmd="set" data="internal_sip_port=5080"/>
<X-PRE-PROCESS cmd="set" data="internal_tls_port=5081"/>

To: 
<X-PRE-PROCESS cmd="set" data="external_sip_port=5060"/>
<X-PRE-PROCESS cmd="set" data="external_tls_port=5061"/>

Modify sip_profiles\internal.xml

Change: 
<param name="rtp-ip" value="$${local_ip_v4}"/>
<param name="sip-ip" value="$${local_ip_v4}"/>
<param name="ext-rtp-ip" value="auto-nat"/>
<param name="ext-sip-ip" value="auto-nat"/>

To: 
<param name="rtp-ip" value="IN.IN.IN.IN"/>
<param name="sip-ip" value="IN.IN.IN.IN"/>
<param name="ext-rtp-ip" value="IN.IN.IN.IN"/>
<param name="ext-sip-ip" value="IN.IN.IN.IN"/>

Modify sip_profiles\external.xml

 

Change: 
<param name="rtp-ip" value="$${local_ip_v4}"/>
<param name="sip-ip" value="$${local_ip_v4}"/>
<param name="ext-rtp-ip" value="auto-nat"/>
<param name="ext-sip-ip" value="auto-nat"/>

To:
<param name="rtp-ip" value="EX.EX.EX.EX"/>
<param name="sip-ip" value="EX.EX.EX.EX"/>
<param name="ext-rtp-ip" value="EX.EX.EX.EX"/>
<param name="ext-sip-ip" value="EX.EX.EX.EX"/>

Modify directory\default.xml

 

Change: 
<domain name="$${domain}">

To:
<domain name="IN.IN.IN.IN"> 

Modify dialplan\public\00_inbound_did.xml

Replace the xml in dialplan\public\00_inbound_did.xml with:

 

<include>
  <extension name="public_did">
    <condition field="destination_number" expression="^(nnnnnnnnnn)$">
    <action application="set" data="domain_name=IN.IN.IN.IN"/>
      <!-- This example maps the DID nnnnnnnnnn to ring  extension 1002 in the default context -->
      <action application="transfer" data="1002 XML default"/>
    </condition>
  </extension>
</include> 

Create dialplan\default\02_neotel_out.xml

In the dialplan\default folder, create a new xml file called 02_neotel_out.xml.

Paste the following xml into the new file and save:

 

<include>
  <extension name="neotel_out">
    <condition field="destination_number" expression="^(\d{10})$">
      <action application="bridge" data="sofia/external/$1@SP.SP.SP.SP"/>
      </condition>
  </extension>
</include>

Test configuration

Install Xlite and create an account with the following settings:

 

Display Name: 1002

Username: 1002

Password: 1234

Authorization user name: 1002

Domain: IN.IN.IN.IN:5080 

Ensure that Register with Domain is ticked and Send outbound via Domain is enabled 

From XLite, dial a 10 digit number e.g. a mobile phone

From your mobile phone, dial your DID (nnnnnnnnn).

If you receive a SIP 500 Error, contact Neotel and ask them to reset/reconfigure your ports on their SBC.