Some Caller ID units only show a number once - no matter how many times the caller has called. If you're wondering why you don't see multiple numbers from people who have called many times, it's because your equipment is trying to save space.Try deleting old numbers to make room for new ones. When they reach their maximum, they may no longer show the most current phone number. Caller ID units can only store so many numbers. If old numbers are showing up, your Caller ID unit might be full.For instance, if someone calls you from a call center, you may see XYZ Telemarketing Services (main number), Customer Service (secondary number) or UNAVAILABLE/UNKNOWN. If a business name isn't showing up, it could be a big company with a main number and multiple "secondary" numbers.Most Caller ID screens display a maximum of 15 characters of data. If names/numbers are being cut off in your display, it's probably because they are too long to fit on the screen.Refer to your owner's manual to learn how to change the language preference. Refer to your owner's manual for instructions. The display contrast on your Caller ID unit needs to be adjusted. If you see a "No Data Sent" message, the phone was picked up before the second ring. If you pick up the phone too quickly, no data can be captured. If it happens on every call, refer to your owner's manual.Ĭaller information shows up within the first couple of rings. A power surge, static or trouble on the line when the data is being sent can cause an ERROR message. You can stop these calls from ringing through to your home by using Anonymous Call Rejection.Ĭaller ID display units are sensitive. The caller has blocked his/her name and number from displaying on your Caller ID unit.
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