Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: does this work if one has an answering system?
Document: We live in cold climate area and while traveling away in winter months one of the fear is water damage due to frozen water lines. Water line freezes when heating system shuts down for any reason. This can cause thousands of dollars of damage. We bought this unit and put it to work. Installation is pretty simple. Connect the power supply, install batteries and connect telephone line. You program up to three telephone numbers.
I use for my salt water aquarium set up. The system include many small water lines and tubing that get unconnected and reconnected in support of maintenance operations. Hence water can occasionally run onto the floor of the basement in which the system sits.This sensor alerts me when I have one of those leaked and when the GFCI kills power to the aquarium. This can otherwise happen to me even when I'm in the home.
If you want to use it with a newer system that works via your computer or internet or TV cable, you will want to consider adding a small UPS to that system, if it does not already have one. This is because a traditional land-line is self powered, while the other systems are not. In case of a power outage, the THP201's internal 9V battery will keep it working, but the same power outage can disable the computer or cable based phone system, so no call would be possible.
Using the "5 minute" setting on the alarm, it will be able to access the VOIP system via the battery and will make a call to you notifying you of the outage.2. I wanted to install this alarm in the basement next to my sump pump. However, a phone jack was nowhere nearby and running cable to install one was not worth the effort. I decided to try a wireless phone jackWireless Phone Jack and Extension Unitand route the connection to the basement from the jack through the house's wiring.
I bought one of these units and installed it in my vacation home, about 120 miles away. It does work, however, this is what I don't like about it. First of all, it requires the use of a land phone line. So I have to pay a $26.00 monthly phone bill. Otherwise I just use my cell phone for all my calls. When the monitor does call you, it uses a series of beeps to inform you of the problem.
While I am very happy with this device, you need to consider how you are going to install it before purchasing. I had to run a phone line into the garage in order to have the unit call out. Having one of those devices that add/piggyback a phone line by using an electrical outlet will not work if the power goes out, so you will need a traditional phone outlet nearby. Other than having to run a phone line to the garage, I highly recommend this product.
The line is a bit noisy (some interference from other appliances -- your results may vary) but for its use, I find it to be acceptable. The voice message and beeps from the alarm are clearly audible. Note that if you use one of these, the power outage feature will NOT work, as the wireless jack will not be able to access the dialtone in the event of an outage.3. You do NOT need to hook a phone to this device to get it to work.
It will function just fine as long as it has a dialtone coming into the "line in" port.One thing I'd love to do is monitor more areas for water, but it appears that additional water sensors are not available for sale on their website. It would be nice if purchasing these was more straightforward.Overall, a reasonably priced and innovative device that seems to work well. It would be nice if it had more connectivity options (Wifi?) and less reliance on the requirement of a land line.
If you have a standard "old fashioned" POTS line (i.e., copper loop powered by the Telco's central office) this is fine. These phone lines work w/o power in your house.If you have phone service via a cable modem, the THP201 will be less effective. If power fails, so too will your cable modem. The THP201 will not get a dial tone when it goes off-hook. (2) The unit comes with only one water sensor.
I have not yet had a real incident to test it fully.Since the other reviews sum up the product well, I wanted to clarify a few things that I had some confusion over before buying:1. One thing I would've liked from it is less reliance on a land line. A lot of people nowadays don't have a land line and don't want to spend the money on one just to get this device up and running. However, this product WILL work with a VOIP service.
Answer: yes