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Re:Ringless voice mails from telemarketers by SyneRyder on Sunday June 04, 2017 @03:40AM (#14480315)
> on our landline the phone lights up and shows the caller ID a second or so before it rings

Not sure about the US, but in Australia this is a phone specific feature. The Caller ID comes between the first and second ring, so if you want a call blocking feature that is completely silent, you need to silence the first ring of every call. Some phones will do this automatically, others (like my Panasonic landline) make it an option you can turn on & off. The Panasonic FAQ has some info:

http://eng.faq.panasonic.com/app/answers/detail/a_id/26547/~...

Re:Ringless voice mails from telemarketers by pbhjpbhj on Sunday June 04, 2017 @05:27AM (#14480520)
I'm in UK, cheap German portable landline phone with virtually no useful settings. Could well be phone specific as you suggest.