Hi Sailorboy, welcome to the board! I apologize for the slow reply, but was out all day.
You might be surprised at how many of those systems are still in service today. In fact I was at a location today that is still running the 2460, which is the larger version of that system.
In short they're generally very solid systems, and as long as it does everything you need, then it may very well take good care of you for many more years.
The System Alarm 10 indicates excessive data errors at a given station. If you have a printer hooked to the system it will tell you which station reported the errors, but it sounds like that alarm is likely very old. It could have been from a bad card, a bad phone, or even faulty wiring, but if all your stations are working then it may have just been from someone setting a book on several keys at once, some oxidation on the base cord plug, or other fluke.
The phone that is displaying the error could be your administrator's station or on a system alarm 10 it could actually be the phone that had the problem. There is a button on the phone called the SPCL key that has an infinity sign on it. That's the key that looks like it has a sideways 8 on it. From the phone that is displaying the error,
with the phone on the hook, press the "spcl" key which is the one with the infinity sign on it, and then dial 019. In most cases you can just dial 019, but if that doesn't work use the SPCL key. That should clear the system alarm. Then just see if the alarm returns. One last thought would be for if you're running any 8 line "Turbo" phones. Those phones have an A-B slide switch on the back that can get some oxidation in them and will often cause a #10 alarm as well. If you're running 12 or 24 line phones that won't be your issue though.
As for dead batteries, they can always be a concern. There is a battery on the main board, but explaining the voltage test procedure while the battery is on the board is a little beyond what I can explain here. A back up of your database is
always suggested. Then if you do lose anything due to a failure you can do a simple restore and you'll be back up and going. As for the UPS I'm a big fan of them on Inter-Tel systems for their surge protection and grounding properties.
On the programming question, Hyperterminal will work well for updating the names on the stations.
