[AMRadio] AM Transmitter "quality"

Frank J. Mercurio w9fm at sbcglobal.net
Tue Sep 15 15:44:47 EDT 2009

"We now fully accept glitchy, noisy and  
totally unreliable service at an absurd price as the norm .. :-)"

Amen Grant! 

Cellular handsets with no side tone, and sometimes severe latency issues make for inefficient and unsatisfactory telephony!


Grant Youngman wrote:
> On Sep 15, 2009, at 2:05 PM, Charles Ring wrote:
>> While modern telephones can produce better audio (no carbon mics),
>> modern phone exchanges don't. Th e old exchanges passed whatever audio
>> was fed into them at least for local calls, but digital switching  
>> has a
>> brick wall cutoff. I
> It depends on whether your exchange is still using a TDM switch or  
> softswitch, and whether you're on a standard landline or VoIP  
> service.  Big difference.
> Even TDM switches now go up past 3Khz -- the standard is in the 3.3Khz  
> range, still far from adequate.  VoIP service is far superior with  
> some services going up to the 7Khz range -- you can actually tell the  
> caller is Granny, which isn't always the case on TDM infrastructure.   
> On the landline here, my wife's sisters all sound the same -- I can't  
> tell who's calling.  If they call on the VoIP line, that isn't the  
> case.  There is discussion about improving cellular bandwidth, too,  
> but with the typical lousy handset, it may not make a lot of  
> difference.  Bad just sounds bad, not to mention the fact that all  
> cellular has really done is kill our "old fashioned" expectations of  
> what phone service should be.  We now fully accept glitchy, noisy and  
> totally unreliable service at an absurd price as the norm .. :-)
> Grant/NQ5T
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