Samsung Prostar 816

To change the ringing on a prostar 816 you first need to be at a display set (doesn't matter what the extension number is).
with the handset down, enter #20 the screen should say MMC DISABLED
enter in 1 2 3 4 1 # (that enables programming)
enter in #62 the screen should say day ring assn
press the line you wish to program
press the buttons for the extensions that you wish to ring (the ones in the right next to the handset)
press # when finished with the line
repeat steps 2 through 5 for the remainder of the lines you wish to change
press # when finished.

Did you try unplugging power cord for five minutes? often this fix the problem.

Hello. Often the aftermath of a power outage is a power surge. If your phone system is not surge protected, this is the likely culprit. The damage done by a surge or several surges can only be assessed with a thorough diagnostic exploration. This has to be done by a technician with the proper diagnostic equipment and know how. j.

Sounds like the system defaulted programming.
Depending on the type of prostar 616 the only ringing station would be 1(or 21) with the porstar or 4(or 24) with the prostar plus.
To change the ringing on a prostar 816 you first need to be at a display set (doesn't matter what the extension number is).
with the handset down, enter #20 the screen should say MMC DISABLED
enter in 1 2 3 4 1 # (that enables programming)
enter in #62 the screen should say day ring assn
press the line you wish to program
press the buttons for the extensions that you wish to ring (the ones in the right next to the handset)
press # when finished with the line
repeat steps 2 through 5 for the remainder of the lines you wish to change
press # when finished.
To program system speed dial numbersyou need the customer programming enabled (see the first part of programing ringing)
press the ALM/SD button
dial the 2 digit speed dialcode 10-98
dial the telephone number to be stored in that speed dial bank
press ALM/SD to store the number

To change the time on a prostar 816 you first need to be at a display set (doesn't matter what the extension number is).
with the handset down, enter #20 the screen should say MMC DISABLED
1) enter in 1 2 3 4 1 # (that enables programming)
2) enter in #55 the screen should say YYMMDDWHHMM
3) enter in the year, month, day, day of the week, hours and minutes(the day of the week values are 1= mon. 2= tues. etc.)
press # when finished.

First thing you should verify a dial tone on the fax machine. (use any analog phone)
If you have dial tone, press 9 and then a number
Second is it conected through tel. system? (did it have an internal extension) and there is no dial tone then your analog port may be fried. Call your telephone vendor. He should be able to help you.
You can purchase a manual for about 10 dollars
Email your system model number to sales at aaa-avad.com for further instructions

To change the ringing on a prostar 816 you first need to be at a display set (doesn't matter what the extension number is).
with the handset down enter #20 the screen should say MMC DISABLED
1) enter in 1 2 3 4 1 # (that enables programming)
2) enter in #62 the screen should say day ring assn
3) press the line you wish to program
4) press the buttons for the extensions that you wish to ring (the ones in the right next to the handset)
5) press # when finished with the line
6) repeat steps 2 through 5 for the remainder of the lines you wish to change
The code for hold recall is #52
enter in your hold recall time in sec. and in a 3 digit format. i.e. 30 seconds = 030 a minute and a half is 090 and so on.
press # when finished

it sounds like the memory battery on the main board is no longer working which means that it'll happen again.

The battery is dead and will not maintain system programing after a power outage. If the battery is not replaced this problem will occur everytime the power goes out.

Your memory battery on your telephone system is bad. when power is lost , so is the programming. to fix this , you must go into system programming. From any phone, without picking up the handset. Press #20 Dial 12341, Press #. Press # again and dial 62, Press Line 1 and then press the button of each stn you want to ring ,( The display will show 1 if you press stn 1 and so on.) program each line the same way.

The Prostar 816 phone system can only use Prostar 816 phones. There is a rare larger Prostar system that can use other Prostar phones along with the 816 but typically was only installed in situations where more than 16 phones were needed. If you are looking at non-prostar phones like the Samsung DCS 12 then they certainly will not work.