I cannot find the manual for my Meridian Northern Telecom M7310 NT8B20 corded phone... We have it set to beep every 30 seconds when a line is on hold. How do I change it to not beep? And how do I turn it back on? (I need to leave a couple lines on hold all day, while I'm the only one in the office, but I want the feature back on tomorrow).
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Try unplugging the set wait for about 15 seconds then plug the set back in... i he set will flash for a while, stop, and flash for awhile... just be patient and it will return.
Then test to see if the Feature, Rls and hold buttons work again.
PS those buttons are hard coded, and cannot be erased, they may fail, but they will not erase.
Maybe you also have a stuck button, that is affecting the set?