This phone is attached to a Partner panel somewhere in your building most likely. At that panel there is either a slot card or a carrier box with several cards in it. One of them is the processor card, on that card at the front should be an area at the bottom w/ a "+" plus sign on it, move the black (usually that color) slide and there will be a carrier for 2 AA batteries (or AAA), replace those and the info should be saved. Alternatively some of these system have a PCMCIA memory card that you can use to back them up and then restore them if something goes wrong later. If you find the main phone on your system (usually 34 button) it may even tell you the batteries need replaced. When we install we also highly recommend hooking the main phone system to an APC backup, even something as small as a 500-600 series just to both protect your investment and in small outages eliminate the worry of this problem.
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At the phone: No
This phone is attached to a Partner panel somewhere in your building most likely. At that panel there is either a slot card or a carrier box with several cards in it. One of them is the processor card, on that card at the front should be an area at the bottom w/ a "+" plus sign on it, move the black (usually that color) slide and there will be a carrier for 2 AA batteries (or AAA), replace those and the info should be saved. Alternatively some of these system have a PCMCIA memory card that you can use to back them up and then restore them if something goes wrong later. If you find the main phone on your system (usually 34 button) it may even tell you the batteries need replaced. When we install we also highly recommend hooking the main phone system to an APC backup, even something as small as a 500-600 series just to both protect your investment and in small outages eliminate the worry of this problem.
Hope this helps you.