Avaya IP Office


The below guides were graciously written by Tom T. and we thank him for his time in writing these. The guides are currently used by lage Avaya IP Office installer, and are known to work brilliantly. 

IP Office V11

To download an updated IP Office Guide for Version 11, click here

IP Office V9

Open the Avaya IP Office Configuration in Manager.

  1. Click on System, and choose which LAN interface the SIP trunk will be connecting through.  In this example we are using LAN2.
  2. Under the LAN tab, click on the VOIP sub-tab and configure the following:
    1. SIP Trunks Enable – CHECKED
      1. RTP – Port Number Range
      2. Minimum: 46750
      3. Maximum: 50750
    2. RTP – Port Number Range (NAT)
      1. Minimum: 46750
      2. Maximum: 50750


    1. STUN Server Address: BLANK  (if it is, clear the field so it is blank)
    2. Firewall/NAT Type: Unknown
      1. This may need to be configured to Open Internet or Full Cone NAT depending on the customer’s firewall
    3. Public IP Address: The public IP of the PBX
    4. Public Port
      1. UDP: 5060
      2. TCP: 5060
      3.  TLS: 5061
        Under the LAN tab, click on the Network Topology sub-tab and configure the following:

  3. Click on the DNS tab and configure the customer’s DNS server and backup DNS server IP addresses. We reccomend using and

  4. On the Group pane on the left, right-click Line and select New -> SIP Line

  5. Overall, the SIP line will have a plain configuration with no need for credentials

  6. Click on the Transport tab and configure the following:
    1. ITSP Proxy Address:,,,
       (The w stands for "weight." This tells your PBX to round robin our IPs)
      1. Copy/paste the above into the field, as all 4 servers will be utilized
    2. Use Network Topology Info: <choose the LAN interface being used for SIP>


  7. Click the SIP URI tab and configure your channels as you would for any SIP trunk
    1. You will need one incoming channel with Local URI, Contact, and Display Name all configured as *
    2. You will need one outgoing channel with Local URI, Contact, and Display Name all configured as “Use Internal Data”


  8. Click the VoIP tab, and configure the following:
    1. Codec Selection: Custom
      1. Under Selected, make the list G.722, G.711 ULAW, in that order

      2. If these codecs are not available, you will need to configure the codec list under System, on the Codecs tab.

    2. Re-invited Supported: Checked


Configure your incoming call routes, short codes, and ARS as normal.  Once saved and rebooted, the system should now have a registered SIP trunk available for calling in and out.


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