What is the maximum distance between two landline phones that can be connected?

The maximum distance between two landline phones that can be connected depends on several factors, such as the quality of the telephone lines, the type of equipment used, and the strength of the signal. In general, the maximum distance for a landline phone is around 18,000 feet or 3.4 miles (5.5 kilometers).

However, the actual distance can vary widely depending on the factors mentioned above. For example, if the telephone lines are of poor quality, the maximum distance may be much lower. On the other hand, if high-quality equipment is used, and the signal is strong, the distance may be greater.

It's worth noting that landline phones are becoming less common as people increasingly rely on mobile phones and internet-based communication methods. Nevertheless, landlines can still be useful in certain situations, such as when there is no cellular coverage, or when a more reliable and stable connection is needed.