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Provider Neotel (South Africa)

Last update: 16 March 2010

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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\ 00_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.