If you are swapping two extensions, and either they are MLX type telephones that you can swap connecting cords at the control unit, or they connect via a patch panel where again you can swap patch cords, or they are TDL type phones and you know how to use a punch tool and can change the jumpers, the best and easiest way is to determine the ports at the control unit and swap them. Otherwise, you can renumber them to swap the extension numbers, but the station features are programmed on the port, not the extension number, so you may need to print out the extensions and make sure that you reprogram things like coverage, etc. If anyone has an auto-intercom buttons to reach either of these phones, they will also need to be re-programmed.
To determine the ports, and make a physical swap at the control unit, go to the programming phone, or fire up SPM software.
Menu
Maintaince
Port
Station
[Extension Number] Enter
Status
This will give you the "Logical ID", and the "Slot/Port" of the first station. Now press "Back" twice, and do the same for the other station. Now you know which two stations to swap.
Looking at your control unit, from the left, the first thing you see is a power supply, then the processor, then the cards in your system, then the 2nd cabinet's powersupply, etc. Dont count the powersupplies, but count the processor in the 1st slot as 00, the 2nd card as 01, etc. Count the station ports from the bottom as 01, 02, 03, etc. Find the two stations, unplug them, exchange them, and plug them back in. Example, the first station was Slot/Port 0104, and the second station was 0208. Go to the 2nd card which is slot 01 (remember the processor is the 1st card, but it is slot 00), and count up from the bottom to the 4th port, and trade the cord there with the one in the 3rd slot, 8th port from the bottom.
Now if you want to renumber them instead, in programming it is a three step process. Renumber the 1st station to some unused "placeholder" number, renumber the 2nd station to the 1st station's extension number, then renumber the 1st station from the placeholder number to the 2nd station's number. Example, swap extension 101 and 102
Menu
System Program
Exit (or Start)
System Renumber
Single
Extension
[enter old extension number]101 - Enter
[enter new entension number]7100 - Enter
Extension
[enter old extension number]102 - Enter
[enter new entension number]101 - Enter
Extension
[enter old extension number]7100 - Enter
[enter new entension number]102 - Enter
Home (or Exit)
Problem here, is you also need to change the labels, the VM coverage, restrictions, etc.
