Telephone test set

Used to establish and test communications on an active analog line, the Model 390 telephone test set features built-in ringer, 10-number programmable memory with battery backup, tone and pulse dialing, last number redial, mute, polarity test, and line disconnect. Its high- impedance monitor helps to prevent disruption of sensitive circuits.
June 1, 1997

Used to establish and test communications on an active analog line, the Model 390 telephone test set features built-in ringer, 10-number programmable memory with battery backup, tone and pulse dialing, last number redial, mute, polarity test, and line disconnect. Its high- impedance monitor helps to prevent disruption of sensitive circuits.

Progressive Electronics Inc.

Mesa, AZ

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