Step 1: Gather information for each user.

Each user has a set of credentials which will be needed to configure each phone. For each phone that you are configuring, obtain the following:

• SIP Address (Address of Record)
• SIP Password
• Auth Username
• Username
• Domain
• Outbound Proxy

You can find this information in the user detail pages under the Users tab in the Phone Configuration section.

Step 2: Configure your Express Talk software settings.

Access the software settings. With your mouse, click the 'Options' button.

Select the "Lines" tab.

Under the Lines tab, enter the following information from Step 1 above:

Line Settings

• Full 'Friendly' Display Name > Whatever you would like.
• Server (SIP Proxy or Virtual PBX) > Domain
• SIP Number (or Username) > Username
• Password > SIP Password

Click on 'Advanced Line Settings (Modified)'

Advanced Sip Server Settings
Under 'Outbound Server' choose 'Use the specified server as the outbound server' option.
If you have connection problems, choose 'Use a different outbound server' and put 'sip.onsip.com' in the 'Outbound Server' field.

Under 'Authentication User Name' choose 'Use a different username just for authentication.' In the blank put in your Auth Username from Step #1:
Auth ID:> Auth Username

Step 3. Confirm that you have disabled all Network Address Translation (NAT) settings on the phone.

We handle all NAT related issues. So, make sure to turn off any NAT settings on the phone in order for your phone to communicate properly with our servers.

To do so, under the Network tab, enter the following:

Allow Incoming Calls and Audio through into Private Networks

• NO Stun Server is enabled. 'Use STUN servers to find external IP Address and Port' is NOT checked.

Step 4. Confirm that your phone is registered.

In the User portal, click on the "Users" tab. You will see a green "online" notation next to each user with a registered phone.

You should now be able to place and receive calls.

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