If you need to test landline telephones, this is how you do it. New telephone line simulators are wickedly expensive, so used is just fine, as there's little to wear out. Supports rotary or touch dialling, generates ring voltage and connects two audio paths. Can be configured to do all kinds of "PBX-like" things (see user manual) including Caller ID This is a popular unit and operator's manuals are available online. Teltone is no longer in business, but they were a well-known telephone equipment manufacturer and this is a quality piece of equipment. The used one I purchased worked perfectly.
Verified purchase: Yes | Condition: Pre-owned
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