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Depends on how their PBX is set up, but often those lines—even if they have separate incoming numbers—will all have the same outgoing number.
by organsnyder 3y ago
Depends on how their PBX is set up, but often those lines—even if they have separate incoming numbers—will all have the same outgoing number.
- lhamil64 3y agoWhich is ironically done by spoofing the number, which is why it's so easy for scammers to spoof numbers.
- organsnyder 3y agoI remember how shocked I was when I first learned how insecure caller-ID is. I was setting up a VOIP PBX for the small business I was taking over from my father after he passed away unexpectedly. I hadn't been able to get into his (telco-hosted) voicemail, until I happened to call the number from the new VOIP line. Since I had the caller-ID set to the same number, the voicemail system not only bypassed the greeting, but it automatically logged me in (it was set to bypass the PIN when calling from the same line). I tell people that caller-ID should be trusted as much as the return address on an envelope. Perhaps I can soon update my guidance now that STIR/SHAKEN is (apparently) near full rollout.