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- Silver_box abstract "A silver box is a modified DTMF keypad that adds the four additional keys used in the now-obsolete autovon phone system. This was usually accomplished with the addition of a toggle switch and a crystal that switched one column of a standard phone keypad into the "fourth column" used in the Autovon system. (These keys were used to set the priority level of a call, and are the red keys in the photo on the right. More information is available in the Autovon article.)Modern phones with an integrated circuit based DTMF generator can frequently be modified by simply soldering a wire from the 1633 Hz leg to a switch that togglesbetween that leg and the 1477 Hz leg for the rightmost column of keys.".
- Silver_box thumbnail Autovon.png?width=300.
- Silver_box wikiPageID "223468".
- Silver_box wikiPageRevisionID "504739667".
- Silver_box hasPhotoCollection Silver_box.
- Silver_box subject Category:Phreaking_boxes.
- Silver_box type Artifact100021939.
- Silver_box type Box102883344.
- Silver_box type Container103094503.
- Silver_box type Instrumentality103575240.
- Silver_box type Object100002684.
- Silver_box type PhreakingBoxes.
- Silver_box type PhysicalEntity100001930.
- Silver_box type Whole100003553.
- Silver_box comment "A silver box is a modified DTMF keypad that adds the four additional keys used in the now-obsolete autovon phone system. This was usually accomplished with the addition of a toggle switch and a crystal that switched one column of a standard phone keypad into the "fourth column" used in the Autovon system. (These keys were used to set the priority level of a call, and are the red keys in the photo on the right.".
- Silver_box label "Silver box".
- Silver_box sameAs m.047gmgt.
- Silver_box sameAs Q7516514.
- Silver_box sameAs Q7516514.
- Silver_box sameAs Silver_box.
- Silver_box wasDerivedFrom Silver_box?oldid=504739667.
- Silver_box depiction Autovon.png.
- Silver_box isPrimaryTopicOf Silver_box.
