My current VOIP service providor is VOIP.ms. This type of VOIP service is not for an average user. You will need to know how to configure a Session Initiation Protocal phone.
Also, it helps to know basics of VOIP and session initiation protocal. I recently acquired three Cisco 7960 Internet Protocal phones. Luckily, they were already configured for use with sessition initiation protocal.
I did not have to reinstall a firmware in order to convert into using session initiation protocal. I am going to walk you through configuring your Cisco 7960 for use with VOIP.ms. You need to unlock a phone configuration by pressing a "settings" button.
Scroll down and highlight "Unlock Config". A "Configuration Password" option opens up. Enter cisco for a password.
Click "Accept" after you enter in cicsco. You have now just unlocked your Cisco 7960 ip phone's configuration. You can now edit settings.
Click on "Network Configuration" and press "Select". You want to scroll down and make sure DHCP is enabled if you have a DHCP server on your network. If you chose to set a static network configuration, make sure to configure it for your local network.
If you have a local Trivial File Transfer Protocal server scroll down and change that server address. You do NOT need a Trivial File Transfer Protocal and it is optional. After making any necessary changes in "Network Configuration", click on "Back" button.
Now you want to select "SIP Configuration". Choose "Line 1" and click on select. As long as you unlocked this phone's configuration successfully, you should see an "Edit" option.
Click on "Edit" to edit Line 1. You want to enter in your VOIP.ms account number in "Authentication Name" field. Enter your password in "Authentication Password field.
Scroll down and highlight "Proxy Address". Enter your appropriate VOIP.ms proxy address ie. denver.voip.ms. Click "Save" after making any edits.
Scroll down and look for "Preferred Codec". VOIP.ms recommends choosing g711ulaw. Look for "Register Expires". Edit this and change to 180, which is what VOIP.ms recommends.
Finally, look for and make sure that "Register With Proxy" is set to YES. Press "Save" anytime you make any changes in these menus. Press back until you get to Cisco phone display.
Attempt to make an outgoing call. If you are not able to make a successful call, you may need to adjust the "Proxy Port" in "SIP Configuration" then "Line 1".