Viking DLE-200B Two-Way Line Simulator

This is a powerful and deceptively simple gadget. If you connect an old-fashioned analog phone to each of its two ports, picking up one phone will cause the other to ring. If someone answers the other phone, you can talk back and forth. I used this to set up an intercom between the house and my workshop using the "second line" wires on the existing analog POTS wiring. This only took a few minutes to set up and works flawlessly.

I used this to make a telephone system between the helm and salon on a boat. Works perfectly. If either phone is picked up, then the other phone rings. The voice comes over loud and clear.

I bought this so that I could connect two of my old analogue phones to use as a "intercom" system between floors in my house. My house was wired already so I was able to install one phone upstairs and one on the main floor. The device gives a dial tone and, just as described, when picking up one of the phones, the other rings. The sound quality is good and it is very easy to set up - basically just plug and play. My daughter loves it! She just calls downstairs, demands yogurt, then hangs up! And I love that I get to use some of my favorite old phones!

Perfect solution to create an in-house upstairs/downstairs intercom using two POTS phones and existing phone lines. The phones ring normally using the POTS ringer. The AC-DC adapter is included.

Works great! Some customization too via switches as indicated in the user manual.

Purchased to set up an intercom from my basement to my upstairs using an old payphone and an old house phone. Worked right out of the box with no issues. If you want to turn two old phone into a fun way to communicate. This is for you.

Not much to say, it just works. Used it for testing PPP dial-in at 33k6 baud. Comes with an sheet of instructions giving specifications, installation instructions (not needed in my case), DIP switch settings and explaining amusing applications for the device such as "prison phone" (intercomm) and "golf applications" such as allowing golfers to order food on the 9th and 18th holes! :-) Connections: two RJ11's. Maximum "loop length": 4.2 km (2.6 miles). Maximum current draw: 600 mA. Includes an AC adapter "wall wart" which puts out 13.8 VAC (yes, A/C) @ 1.25 amps. Is configured via an external 4-position DIP switch and an internal 5-position DIP switch. External DIP sets: Ring cadence (long-long, short-short-long, short-long-short, 2-seconds on/4 seconds off), audio volume, and answer mode (immediate ringdown or 2-seconds of dial-tone followed by ringdown mode). No external label of these functions so you'll want to keep the paper docs handy. Gave four stars rather five not for any defect but because it could be improved -- say, by having a clip to hold the folded instruction sheet (I used a rubber band) or by having a condensed set of instructions (DIP sw settings) printed on the device's case.

I don't know why you need to call yourself on your own phone at your own house, but my son got this and loves it. He is always playing with landline phones and knew what this was supposed to do and he had me buy it for him.