I recently purchased a blue lineman’s handset for $12. It is quite an interesting piece of hardware. At first glance, it looks like a standard handset, but upon further review there are characteristics that set it apart. On the back of the handset is a rotary dial used for dialing numbers, a hook to connect it to the belt, and two test leads with alligator clips. The alligator clips have a piercing spike in them to connect to insulated wires. No stripping is necessary. On the side of the phone, there is a switch that can go between TALK and MON. MON in this case stands for monitor. There is also a nice “Bell System Property … Not for sale” engraving.
I brought the handset home and plugged it in. I had the switch on TALK and instantly heard a dial tone. I decided to call my cellphone, and entered the number (which can take a bit of time using a rotary dial). I got connected and heard my voice mail message. I decided to try to use my old Radioshack tone dialer next. I punched in the number on my tone dialer, and held it up to the handset. I hit the dial button on the dialer, and heard the tones through the earpiece of the handset, but the tones did not register on the handset itself, and the number wasn’t called.
Next, I flipped the switch on the handset to MON mode. At first, I didn’t hear anything on the line. I hooked up a standard phone nearby, and picked up the handset of that phone. My lineman’s handset instantly had a dial tone, and was monitoring the line. The MON setting also turns off the microphone in the handset, so there are no slip-ups when monitoring.
Other than the cool factor, there are a few things I can do with it. I could use it as a house phone, though it does not have its own ringer. I could also do some wire tapping, but that is illegal. It is not a very practical piece of hardware, but it certainly does hold my attention. Maybe the web will end up lending me some ideas of what I could do with it.