On Thu, Apr 05, 2018 at 10:20:29AM -0400, William Herrin wrote:
> For example, Vonage implementing Simultaneous Ring, you want to see
> the original caller id on your cell phone, not your vonage number even
> though Vonage is bridging the call to your cell phone.
>
> More, the PBX may have trunks from multiple vendors and may use a
> different outbound vendor than the call arrives on, so you can't even
> reliably implement a rule that the outbound caller ID is rejected
> unless there's an active inbound call with the same caller id.
>
> Regards,
> Bill Herrin
So the logical conclusion is that caller ID is useless as an
anti-vspam measure and the situation is hopeless, so the only
solution is to not personally answer the phone at all -- let voice
mail take a message.
This is what I have adopted on my personal landline. With the
ringers disconnected. Although I get probably a half-dozen incoming
calls a day, perhaps one a week will leave a message. Most of those
messages are recorded announcements that started playing even before
the voicemail greeting finished.
- Brian
