Telephone question
 

Anyone have a clever solution to this problem...

I have a one-line telephone, but two telephone lines in the house.

Is there some way, perhaps with relays to recognize which line is
ringing and have the one-line phone connected to the ringing line?

(It's a honey-do problem... you know... "pretty phone, don't throw it
away" :-)

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

Telephone question
 

Anyone have a clever solution to this problem...

I have a one-line telephone, but two telephone lines in the house.

Is there some way, perhaps with relays to recognize which line is
ringing and have the one-line phone connected to the ringing line?

(It's a honey-do problem... you know... "pretty phone, don't throw it
away" :-)

Radio Shack used to sell such a device. IIRC it's basically a
latching relay with the coil(s) activated by the ringing current.

Dunno if they or anyone else still markets something like this... I
bought ours back in the late 1980s.

Telephone question
 

On Tue, 10 Jun 2014 11:06:57 -0700, the renowned Jim Thompson
wrote:

Anyone have a clever solution to this problem...

I have a one-line telephone, but two telephone lines in the house.

Is there some way, perhaps with relays to recognize which line is
ringing and have the one-line phone connected to the ringing line?

(It's a honey-do problem... you know... "pretty phone, don't throw it
away" :-)

...Jim Thompson

Search for "2-line switch".

These guys in Taiwan have one that looks to meet your request, and
apparently they'll ship.

http://www.mycomsolutions.com/ax520/ax520.htm



Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

Telephone question
 

On Tue, 10 Jun 2014 18:34:29 -0400, Spehro Pefhany
wrote:

On Tue, 10 Jun 2014 11:06:57 -0700, the renowned Jim Thompson
wrote:

Anyone have a clever solution to this problem...

I have a one-line telephone, but two telephone lines in the house.

Is there some way, perhaps with relays to recognize which line is
ringing and have the one-line phone connected to the ringing line?

(It's a honey-do problem... you know... "pretty phone, don't throw it
away" :-)

...Jim Thompson

Search for "2-line switch".

These guys in Taiwan have one that looks to meet your request, and
apparently they'll ship.

http://www.mycomsolutions.com/ax520/ax520.htm



Best regards,
Spehro Pefhany

Thanks, Spehro, Looks perfect!

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

Telephone question
 

On Tue, 10 Jun 2014 11:06:57 -0700, Jim Thompson wrote:

Anyone have a clever solution to this problem...

I have a one-line telephone, but two telephone lines in the house.

Is there some way, perhaps with relays to recognize which line is
ringing and have the one-line phone connected to the ringing line?

(It's a honey-do problem... you know... "pretty phone, don't throw it
away" :-)

...Jim Thompson

The ring signal is a strong (I think the specification is 96V p-p) 20Hz
AC signal on top of the 48V DC to the phone. It's got enough oomph
behind it to ring real, physical bells in several phones at once (or in
my case, one honkin' big bell that can be heard all over my 5 acres when
the shop door is open).

When you pick up the phone, about 48V/1200ohms flows through the phone,
providing power to the phone and a signal to the central office that the
phone is picked up.

Surely you can figure it out from there?

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com