HELP!!!!

Purchased a used ProStar 816 system w/ONE[1] 816 set & FIVE[5] 800 sets.

Have TWO[2] lines and will use all SIX[6] phones.

PROBLEM ...

I followed procedure listed above BUT ...

1-#20
2- x-x-x-x-1 AT THIS STEP x-x-x = ERROR

The # = key does open programming
The #20 = MMC Disabled

But I cannot get past the "3" in the x-x-x-x-1 ...

When I try #21 it asks for old password???

PROBLEM: Presently it rings only on the display set.

Thanks in advance and have a nice day.

LC

please try not to use passwords here. you can pm anyone you like and use them there thanks.