SIP Flowroute to IP Office R5

SIP Trunking between Avaya IP Office R5 and Flowroute by
Kyle L Holladay, Sr R.I.P

In this example we will configure a SIP trunk between the Avaya IP Office and Flowroute using registration on LAN1 behind a firewall/NAT. Alternative configurations would include a static public IP or static IP behind a NAT/Firewall which will not be covered in this document.


NOTE: Flowroute claims T.38 version 0 support as of May 2009 however I have not been able to successfully negotiate any T.38 traffic at this point using version 0 at 9600bps and IP Office EI version 5.0 due to a requirement by Flowroute of information in the INVITE that the IP Office does not currently support. Thus far Flowroute’s technical support has been responsive and helpful. The call quality has been fantastic, far beyond what I have come to expect from other ITSP (over the Internet SIP providers).


First we need to obtain the IP address of the Flowroute SIP server. Because the IP Office does not use DNS to resolve the name of the SIP server you will want to use PING on your PC to resolve this name, you can find the SIP Proxy name by clicking on Interconnection on the Flowroute Manager web site. From your computer enter ping from the command line (CMD) and make note of the IP address that is returned. From this point on we will use to refer to the Flowroute SIP server, if you resolve a different IP address you should use that instead.
Use CMD to ping


The IP Office will need a number of ports opened on your firewall in order to properly communicate with the Flowroute SIP server. You will need to insure that the following ports are open for both inbound and outbound traffice, without restriction.
UDP 5060 (SIP Signaling)
UDP 49152 – 53246 (RTP Traffic)
NOTE: The RTP range can be modified under System>LAN1>Gateway if requested by your provider.
Make note of UDP Port settings for SIP (5060) and RTP (49152-53246)


Ensure that you have a default route created in your IP Office under IP Routes that points to your LAN1 interface.
Create default route to router on LAN1


Once you have your NAT created and all your ports opened in your firewall (refer to the documentation provided with your firewall/router for directions on how to do this if you are unsure) you can verify that you are ready to move forward by running STUN in the IP Office. Open Manager and click on System>LAN1>Network Topology and click on the [Run STUN] button. This process will take a while so just wait for the results which will be indicated by a flashing  next to several fields. You are looking for “Open Internet” or “Full Cone NAT” in the Firewall/NAT Type field. Any other entry indicates that you have not properly setup your firewall/NAT. A proper result should look similar to that below (we will use as the public IP of the IP Office for this example):
Click [Run STUN] and look for Open Internet or Full Cone NAT adjust Firewall if any other value is returned


Once you have properly configured your firewall/NAT and your IP Office has properly recognized your public IP address via STUN and sees all necessary ports open you can proceed with configuring your peer/trunk with Flowroute.


We will skip most of the basic signup options for Flowroute however you will want to start by visiting and selecting the Sign Up Today option create an account once done they will give you a $0.25 credit which will allow you to test their service for outbound calls. Purchasing a DID or placing inbound calls will require a minimum purchase of $35 and at least a single DID.


While Flowroute does support routing to a public IP their default is registration which is what we will cover in this document. Go back to the Flowroute Manager web site and once again click on the Interconnecton tab.
Set the options to match the picture to the right making sure to select “Registration” as your “Peer Type” ignoring the “Peer Address” and enter any password you like in the “Password” filed. You must also make note of the full “Peer Name” at the top of this form as you will need to enter that later.
Make note of Flowroute Interconnection information


Now we will create a SIP line in the IP Office. In Manager right click on Lines and select New>SIP Line. In the pane on the right enter as the ITSP Domain Name and the IP address obtained from your ping to ( in our example) as the ITSP IP Address. Check the In Service and Use Offerer’s Codec check boxes and select G.729(a) 8k or Automatic Select as the Compression Mode from the drop down. Select UDP as your Layer 4 protocol and LAN 1 as your Network Topology. Leave 5060 as your Send Port. You will need to select “Registration Required” and enter the Username you obtained from the Flowroute’s Interconnection tab on the Flowroute Manager web site as your “Primary Authentication Name”. You will also need to enter the password that you selected in the step above as the “Primary Authentication Password”. Generally your screen should look similar to this:
Create new SIP Line and enter information from Flowroute web site


With IP Office 5.0 you may wildcard your URI on the SIP Line tab to allow for ambiguous validation of the URI on INVITE without the need to build a specific list of URI for validation. With IP Office R4 this was not possible and a specific URI list had to be created for inbound validation of the INVITE.

Under your SIP Line click on the SIP URI tab and then click on the [Add] button. Typically you would enter your DID in the three drop down fields and repeat this step over and over for each DID that would not be associated with a specific user. Instead we will wildcard this entry by adding a * for each of the three drop down fields.

You will also want to set your Outgoing Group to some number not associated with any ARS table so that your outbound caller ID can be controlled by the “Use User Data” URI entry created in the next step.
Set wildcard URI and line group ID


Now repeat the step above but this time we will select “Use User Data” for each of the three drop down fields.

You will also want to assign an appropriate incoming and outgoing group ID for this line which will be referenced in your associated ARS tables.
Set line group ID

Now you must modify your existing ARS table or create a new one to accomodate the domain information needed to make an outbound call over the SIP trunk. For each entry in your ARS table add “” so that the entry looks as such:
add domain information to telephone number field of ARS table

Next we must add our URI information for your individual users. For each actual user you will also want to set a URI. Either a unique DID for that user or a main telephone number that may be the same for multiple users. This will be used to display the outbound caller ID when that user places a telephone call.
Enter URI aka DID for each user

Finally we need to create our incoming call routes. This is no different than the incoming call route you would create for an ISDN trunk. Enter your line group ID, number and destination. No special domain or SIP information is needed.
Create incoming call route for each URI

NOW SAVE! Save your configuration and reboot your IP Office and you’re ready to test!


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