A locally scoped address is a limited connection to the internet that is protected within our organization by a firewall from the global internet. Because VoIP phones require an LSA port, you cannot pass internet through your computer to a desktop phone or other VoIP device. The LSA protocol would not allow your computer to function properly on the internet.

Having your VoIP Phone or other device plugged into an LSA port is necessary in order to avoid malicious programs from accessing and harrassing your phone. It also allows greater access of many organizationally owned items like our University Address List and PIN login. Unfortunately, the calendar feature on LSA connected phones is not functional.

The easiest way to test if your port is LSA enabled is to connect your computer's or laptop's ethernet to the port at your workstation (ensure WiFi is turned off). If you can access sites outside of our universities domain (try facebook.com, apple.com, cnn.com) - then your port is NOT an LSA enabled port. An LSA ported device will not have open access to websites other than our own (uiowa.edu)

Another method of testing to see if your port is LSA enabled is to email hostmaster@uiowa.edu with the port number and slot number (1/2 or 2/2 slots)

Email hostmaster@uiowa.edu the following:

  • the MAC address of your phone or device that you will be connecting. Plug that device into the port that you'd like to have LSA enabled
  • The port number and whether you'll be plugging into the first or second switch of that port. University properties typically will have the port number label printed on the port

To find the MAC address of your Polycom VVX 201 (or similar) phone:

  1. The MAC address can be found above the barcode on the back of your phone. Many will begin with 64.
  2. The MAC address can also be found by clicking the home button in the upper right of your phone and navigating to Settings > (4) Status > (2) Network > (2) Ethernet

When you send your MAC address to hostmaster@uiowa.edu, ensure that your device is currently plugged into the ethernet port.

Article number: 
Last updated: 
March 15, 2017