2 ms·
When the originating device is a land line, how did the system know which antenna(s) to route the call to? And how did the receiving mobile device know the bro
by jimbokun 4y ago
When the originating device is a land line, how did the system know which antenna(s) to route the call to? And how did the receiving mobile device know the broadcast signal was meant for that specific mobile phone?
- chmod600 4y agoIt looks like they had to try a general area (like "Centerville"). To know that it's for a particular phone is easy, just have some tones that identify the intended recipient, and the phone will only ring if the tones match.