Sorry, we were unable to sign you in.
Please check your email address and password.
Your last basket is still available
The basket of your last visit to Black Box is still available.
Would you like to view the products in this basket?
The Black Box website uses cookies. By continuing the use of the Black Box website, or by pressing the agree button on the right, you consent to the use of cookies on this website.
More information.
IEEE 1284, the standard for bidirectional parallel printer bus support, defines two interface levels and specifies a physical and electrical interface.
Level I and Level II
The Level I interface is for devices that need reverse-mode capabilities but don’t operate at high speeds. The Level II interface is for both bidirectional and high-speed communications.
Connectors
The 1284 standard also defines connectors for use in the parallel interface. The 25-pin DB25 connector is defined as the Type “A” connector. The Telco 36, a 36-conductor, 0.085" centerline Champ connector with bale locks is defined as the Type “B” connector. The Type “C” connector is a 36-contact, 0.050" centerline mini connector with clip latches.