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Who is responsible for Caller ID timestamps?
I have an AT&T CL84107 phone (had it since April, 2018) and have had Spectrum Voice since Jan., 2020. My phone allows me to set its date and time manually, and it can keep the date and time synchronized by using the date/time stamp in caller ID info. [I've had the auto-synch feature turned on since before I switched to Spectrum.] About a week ago, I noticed that the date and time are way off. [It's not a time-zone or daylight saving thing; now (July 8, 2021 6:00pm), it says Feb. 23, 2020 11:43am or something like that.] I can manually set the date and time correctly and, as soon as the first call comes in, the date time change to the bogus setting. [The phone does only local time; there is no time-zone setting.] The caller ID history is full of bogus date/time stamps. [The last valid one was June 29th.]
Web searches show lots of people complaining about the same issue - with other VoIP providers.
Yes, I rebooted the VoIP adapter (MTA) and the cable modem. [I'm in the habit of rebooting the VoIP adapter because, about once a month, the phone service goes out completely (no incoming calls; no dial tone) and I have to reboot to get it back. -I have battery back-up for the phone, the VoIP adapter, the modem, and lots of other stuff.]
I reported it a few days ago via a Spectrum web page. No response. This afternoon, I called, and they insisted it can't be wrong, so it must be my phone. [They are sending me a new adapter - because mine is kind-of old.]
For now, I turned off the auto-synch. feature on the phone. [And, the most recent calls show up in the caller ID history with valid dates/times. I assume that the phone - with the auto-synch. feature turned off - ignores the date/time in the caller ID info. and uses its own clock.]
But, I assume that, like most low-cost computer equipment, the clock will drift; I'd rather have it stay in synch. automatically via what I assume is some internet-based date/time mechanism. [It's been pretty reliable on all of my computers, with various operating systems.]