From: ldo@nz.invalid   
      
   On Wed, 20 Aug 2025 18:44:40 -0400, InterLinked wrote:   
      
   > On 8/20/2025 6:08 PM, Lawrence D’Oliveiro wrote:   
   >>   
   >> On Wed, 20 Aug 2025 09:37:24 -0400, InterLinked wrote:   
   >>   
   >>> There is a lot of stuff in the field that uses 300 baud modems for   
   >>> telemetry.   
   >>   
   >> I have a customer who does a lot of that, up and down the country.   
   >> They use wireless connections (formerly 3G, now 4G) for that.   
   >   
   > Everything I deal with is on POTS lines.   
      
   Seems like an expensive and unwieldy way to do it. The remote sensors   
   might need to go months between inspections. They need to, not only   
   withstand the elements, but have an adequate power supply. A wireless   
   data connection means they can make a connection, exchange data, and   
   disconnect again, all within a fraction of the time (and power   
   consumption) it takes to do a modem handshake.   
      
   >>> Low-speed modem protocols without error correction also tend to be   
   >>> a decent quality test for voice connections.   
   >>   
   >> A more accurate test would surely involve actual voices.   
   >   
   > It can be hard to test things like latency and compression purely   
   > from just voice.   
      
   Sure it is. All you need is the right instrumentation and testing   
   standards to measure that voice. You *do* have standards, don’t you?   
      
   > Bad or just-okay connections tend to be forgiving for voice but less   
   > so for data.   
      
   Another reason not to use them.   
      
   Here  is the sort of comms modules   
   that customer is using.   
      
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