[VoIP] Question on connecting old dial telephone

[Steph Kerman]

Duncan Smith wrote:
> 1. It's rather crotchety. Sometimes verticals (what's the proper term, 
> anyway?)
I believe they are formally referred to as selector or elevator rods.  
The popular term was "monkeys on a stick".
> 3. You won't be able to dial out to CNET, because Panel switches were 
> never fitted for DDD; so far as I know all toll calls were
> operator-handled. Thus, a Panel switch can only out-pulse the last 
> five digits of the dialed number. (Could someone please prove me
> wrong?)
Since most Panel offices were in service well into the 1970s, most were 
in fact converted to DDD the same way most #1XB units were: by the 
addition of Auxiliary Senders, which also provided MF outpulsing 
capability.  If the Seattle equipment were equipped with the AUX SDRs 
you would be able to call into the #1XB unit, which can only receive 
MF.  But unfortunately the museum does not have the AUX SDRs.

Most #1XB units were only able to store 8 digits, like Panel, and send 
RP until AUX SDRs were added.  Very late in the game, wirespring relay 
subscriber senders and terminating senders were developed.  This is what 
the Seattle Museum has.  The SUB SDRS provided Touch Tone calling and MF 
O/P without additional equipment but the TERM SDRs lack RP receiving 
capability, making them incompatible with the Panel.

Steph
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