General PBX or Phone System Setup Guide

  • Updated on Oct 22, 2025
  • Published on Oct 1, 2024
  • 2 minute(s) read
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Not ready to set up your PBX yet? No worries! You can test our services using a simple softphone solution. This guide provides step-by-step instructions for configuring the Zoiper5 softphone on your PC.

If we do not have setup documentation for your PBX or phone, please try to find these configuration settings on your system. Most systems require the basic settings below:

  • “SIP Authentication ID/Username” - Add your Flowroute Tech Prefix to the User ID field. To retrieve this, go to our Customer Portal and select the “Interconnections” menu on the left and then select the “Registration” tab to get the User ID/Tech Prefix number and password. These are referred to as the “SIP Credentials” in the Flowroute Portal.

  • “SIP Password/Secret” - Enter the Password found in your Flowroute “SIP Credentials” into this field.

  • “Outbound Proxy/Domain/Gateway Host/SIP Server” - Enter your preferred Flowroute Point of Presence (PoP) for your connection to our network and use Port 5060.
    You can view our POPs by navigating to Interconnections > Registration in the Flowroute Customer Portal or view the list at this link:

  • “Audio Codec” - Ensure that your system uses the G.711-ulaw and the optional g.711-alaw codec.
    You also have the option to add the G.729 codec. If your PBX and the receiving destination support it, the codec will be used. 

Dialing Patterns (To and From)

  • In the Outbound Caller ID Number field, enter the number you want to show as the number you’re calling from. This will appear in the From header. It should be in full 11-digit format (E.164) for U.S. telephone numbers, including the prefix 1 and area code. For example: 12285559300

  • Remember to prepend a 1 for 10-digit dialing for outbound domestic US and Canada calling. Strip the 011 in the dialing pattern for outbound international calls. For 3-digit dialing, Flowroute supports 711, 911, 933, and 988.

  • After everything is set, try rebooting your system and calling a number.

  • You can check the phone system registration status in the Flowroute Customer Portal “Interconnections” menu in the “Status” tab.

E911 Routing

Use the following method in the Customer Portal if you need to set up a number with E911 geolocation info for emergency responders. Navigate to DIDs, check the relevant DID, select “Assign/Enter E911 Profile” in the dropdown action menu above the DID table, and then confirm the action. Assign an existing address or add a new address on the following screen and confirm the order.

 

International Calling

International dialing also needs to be enabled in the Customer Portal. Navigate to “Preferences” and then select the “Fraud Control” tab. There is a toggle for “International Calling” plus other international calling restriction options.

Flowroute charges per minute for international calling, so funds will also need to be added to the account balance for international usage. This article shows how to add funds to your account.

Setting CNAM

CNAM is set by navigating to “DIDs” and then checking the relevant number to apply the “Set CNAM Storage Preset” action. This loads another page which allows you to assign an existing CNAM value or create a new value. Once you complete the order, allow up to 5 days for the CNAM change to fully propagate.  

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