By default the ProTalk door entry solution has an IP address of 192.168.1.250.
If you need to change this then you need to take the front case of the unit off and look for the four DIP switches. These are usually towards the top right hand corner of the unit.
Ensure that the fourth (far right) DIP switch to the on position, if not change it to on and restart the unit.
You will now need to access the web interface of the unit. If you are unsure of how to do this, please see this article.
From the Network setting page set the IP address as required and then click save and restart. Ensure that DIP switch four remains in the On position.
Resetting the IP address
If you wish to reset the IP address of the unit, set DIP switch four to Off and restart the system. Once it has rebooted set it back to the On position.