This configuration has been tested with ATA Firmware Revisions 1.1.2, 1.2.5, and 1.3.5. See Finding your Zoom ATA's Firmware Revision.
First, you must access the ATA Manager:
- If you are using a Windows computer, download and run the Zoom ATA Manager (.exe file).
- If you are using a non-Windows computer, or if the Zoom ATA Manager will not run on your computer, you can access the ATA Manager by entering the ATA’s IP address in your web browser’s address field. (Please click here if you are not sure how to find your ATA’s IP address.)
- When prompted for a Username and Password, enter the following in lowercase letters:
Username: administrator
Password: metamorph
Once you are logged into the ATA Manager, click the Advanced icon at the top of the screen and then, in the left column, select VoIP Accounts and then Your VoIP Account.
On the Your VoIP Account page, enter the following:
| Parameter | Setting |
| SIP Enable | Enable |
| Service Provider Name | Callcentric |
| Outbound Caller ID | Type your name or a display name you want to use |
| Phone Number (SIP User ID) | Type your Callcentric number, which is 1777 followed by 7 digits (e.g., 17771234567) |
| Auth User Name | Type your Callcentric number, which is 1777 followed by 7 digits (e.g., 17771234567) |
| Auth Password | Type your SIP password, which is the password you created when you signed up for a Callcentric account. |
| SIP Server | callcentric.com |
| Auth Domain | Leave this field blank |
| Outbound Proxy | callcentric.com |
| Register Domain | callcentric.com |
| ReReg Interval | 120 |
| Subscribe Domain | Leave this field blank |
| ReSub Interval | 1800 |
| Use Outbound Proxy for REFER | Disable |
| Ring Type | 1 |
| Dial Prefix | Leave this field blank |
| Preferred Codecs |
Leave these settings blank |
Now click Save These Settings and then click Reboot ATA.
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