[GreenKeys] sort of OT: 110 baud modem

[Chris Elmquist]

The 101A,B,C used the same tones as the 103, which is the mode that a “smart modem” uses when running at 300 baud.  So, you should be able to originate a call with the 101 and answer it with a smart modem in 103 mode and then happily talk at 110 baud.

You just have to make sure that one end is in originate mode and the other in answer mode as this is how they send and receive the correct tone pairs.

101/103 originate tones are 1070/1270 Hz for transmit and 2025/2225 Hz for receive. Answer mode reverses these pairs.

Chris N0JCF

--
Chris Elmquist

> On Jan 9, 2018, at 9:50 PM, Pete Lancashire <pete at petelancashire.com> wrote:
> 
> If you can't find one, I can lend you a 300 baud modem. Don't remember the make but is does play the 101 tones
> 
> BTW I have a 101C and a GTE equiv. Someday want to do a 101C to 101C 'chat'. One is inside a 33 and the other
> inside a 35.
> 
> 
> 
>> On Tue, Jan 9, 2018 at 7:42 PM, David Effa <wd9itr at arrl.net> wrote:
>> Keith,
>> 
>> The oldest I have is a US Robotics Sportster 28,800 Data modem, but I think that won't go that slow for you (Bell 103C and Bell 212A compatible).
>> 
>> Dave, WD9ITR
>> 
>> 
>>> On Tue, Jan 9, 2018 at 6:19 PM, Keith Lueck <kwlueck at swbell.net> wrote:
>>> Hello all -
>>> 
>>> Does anyone know of a cheap external serial modem that will connect at 110 bps?  I've found a bunch of vintage Hayes 1200's on steal-bay, but they're pretty pricey, considering they're old junk - I guess vintage computing people are snarfing them up...  Anyway, even if I was inclined to buy one of those, it appears that the minimum connect speed on them is 300 baud.  
>>> 
>>> I don't feel like rolling my own.  I want see if I can make the 101C in my ASR33 function just for sh*t's and giggles.  
>>> 
>>> If anyone can point me in the direction of something suitable, please let me know.
>>> 
>>> Thanks!
>>> 
>>> Keith
>>> 
>>> ______________________________________________________________
>>> GreenKeys mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:GreenKeys at mailman.qth.net
>>> 
>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>> 
>> 
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>> 
>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> 
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
> 
> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20180109/4aa019e9/attachment.html>