3 ms·

Thing is, with robocalls, your a program is sequentially dialing numbers so even if you never share your phone number with anyone you'd still get robocalled. It

Thing is, with robocalls, your a program is sequentially dialing numbers so even if you never share your phone number with anyone you'd still get robocalled. It's not very hard to guess a valid number whereas trying to build valid emails via brute force is not possible in the same way.

walrus01 5y ago
That is true and I cannot avoid the robocalls which are dialing a whole block of almost 10000 numbers in an NPA-NXX. Generally I don't answer unknown numbers since almost anyone that needs to reach me is either in my contact list, will reach me by Signal or another method, or I already know to expect a call from them. Of course this doesn't eliminate the possibility of receiving an incoming call from spoofed caller ID that is a perfect 1:1 match with an existing entry in my address book, but that's quite rare. I can only avoid the ones that are the result of some 3rd party that has an entry for me as firstname,lastname,phonenumber in some CRM system for marketing database. It does help a lot on the targeted calls.
- lalaland1125 5y ago
  Seems like in theory this could be solved by having your asterisk system connect the call. Then block all numbers on your phone except your system.
  - walrus01 5y ago
    It could, I'm not quite ready to take that step yet. Or I could use exclusively a SIP softphone (zoiper) on my android phone to connect directly to my asterisk system as an extension, and only accept calls on that, which would come from the incoming filter call flow. The downside of that is that phone calls wouldn't work when in very marginal data coverage/rural areas, since voip-over-LTE-data relies on a fairly solid and packet loss free network connection, and the additional battery drain of maintaining a persistent sip client-to-server session on the phone all the time. I do have several extensions set up in zoiper for other purposes but I don't keep it running all the time.
    - Terry_Roll 5y ago
      Cell companies using deep packet inspection to analyse data have been known to throttle voip calls to mobiles. I think the minimum std for voip is around 56k so you dont need much bandwidth, but data over mobile phone networks is typically a burst of data which is the opposite of landline networks. I could use freeswitch (asterisk rival) on 2.5g quite easily, but you really are at the mercy of a cell masts traffic management software, however in the android app store there are some apps which let you override the cell mast traffic management so you can remain attached to the cell mast of your choosing when you want to. That also helps you avoid being triangulated for location purposes. Voice to handset always had highest priority as traffic, then text and then data, but the last two may have changed priority in recent years.

walrus01 5y ago

That is true and I cannot avoid the robocalls which are dialing a whole block of almost 10000 numbers in an NPA-NXX. Generally I don't answer unknown numbers since almost anyone that needs to reach me is either in my contact list, will reach me by Signal or another method, or I already know to expect a call from them. Of course this doesn't eliminate the possibility of receiving an incoming call from spoofed caller ID that is a perfect 1:1 match with an existing entry in my address book, but that's quite rare. I can only avoid the ones that are the result of some 3rd party that has an entry for me as firstname,lastname,phonenumber in some CRM system for marketing database. It does help a lot on the targeted calls.

lalaland1125 5y ago
Seems like in theory this could be solved by having your asterisk system connect the call. Then block all numbers on your phone except your system.
- walrus01 5y ago
  It could, I'm not quite ready to take that step yet. Or I could use exclusively a SIP softphone (zoiper) on my android phone to connect directly to my asterisk system as an extension, and only accept calls on that, which would come from the incoming filter call flow. The downside of that is that phone calls wouldn't work when in very marginal data coverage/rural areas, since voip-over-LTE-data relies on a fairly solid and packet loss free network connection, and the additional battery drain of maintaining a persistent sip client-to-server session on the phone all the time. I do have several extensions set up in zoiper for other purposes but I don't keep it running all the time.
  - Terry_Roll 5y ago
    Cell companies using deep packet inspection to analyse data have been known to throttle voip calls to mobiles. I think the minimum std for voip is around 56k so you dont need much bandwidth, but data over mobile phone networks is typically a burst of data which is the opposite of landline networks. I could use freeswitch (asterisk rival) on 2.5g quite easily, but you really are at the mercy of a cell masts traffic management software, however in the android app store there are some apps which let you override the cell mast traffic management so you can remain attached to the cell mast of your choosing when you want to. That also helps you avoid being triangulated for location purposes. Voice to handset always had highest priority as traffic, then text and then data, but the last two may have changed priority in recent years.