[BC] Analog Longevity

[CBoone]

Analog phones in most cases did the DTMF tones internally......the digitals
all generate the tones at the last switch end (all the phone sends is
digital signals, nothing analog)...the cell switches when sending DTMF to
the Telco evidently default to a short on/off timing which works ok talking
to the PSTN...but not too well when it comes to remote control systems..


> -----Original Message-----
> From: broadcast-bounces at radiolists.net 
> [mailto:broadcast-bounces at radiolists.net] On Behalf Of Gary Peterson
> Sent: Thursday, July 14, 2005 8:03 AM
> To: broadcast at radiolists.net
> Subject: [BC] Analog Longevity
> 
> I still carry/use an analog cell phone.  It is much more 
> reliable, than most digital cell phones I have tried, when 
> used to access dial-up remote controls at transmitter sites.  
> I've been told analog will go away, here in western SD, in a 
> couple of years.
> 
> I have wondered if DTMF tones are generated within the 
> digital cell phone or if they are created at the cell site.  
> No one at the cellular company has been able to tell me.  I'm 
> searching for an explanation as to why my remote controls 
> don't like tones from digital cell phones (CDMA here).
> 
> Gary, K?CX