IBM 1220 ユーザーズマニュアル

To identify the LocalTalk Zone provided by the LocalTalk network. This menu item cannot be modified 
through the operator panel.

To specify the maximum number of NPA hosts that can register for NPA alerts.

To specify whether the printer performs the special processing required for bidirectional 
communication, following the conventions defined in the Network Printing Alliance (NPA) Protocol.

Note: Changing this menu item automatically resets the printer.

Printer does not perform NPA processing.

Printer examines the data to determine the format and then processes it appropriately.