Tech forum

摘要

We would like to plug our credit card terminal into one of our Vodavi Starplus STSe telephone system's SLT ports so that we can use the system's "off hook preference" feature to find another unused line if the usual line is already in use. However, the credit card terminal needs more power than the 22V provided by the KSU's single line port which drops to 8V when in use. Sometimes the terminal says "no line" and other times it does connect but cannot communicate because something inside the terminal is causing a clicking noise as if it were rapidly connecting and disconnecting — although it does send the DTMF dialing signals in spite of the clicking. (Our phone company provides 50V which drops to 12V, which works fine for the terminal.