2.The "UPnP Mapping Lines" field is set to 0 by default. If required, change the setting to a specific line by selecting a line from the list. Valid values are 0 through 10. The line you select is the line that your remote phone uses to perform Universal Plug and Play on the network you are connecting to.
3.Click to save your settings.
Additional Features
Model 6757i IP Phone User Guide | 229 |