Editing Apple LaserWriter II NT (section)

== Interfaces ==

=== LocalTalk Interface ===
Primary networking interface for AppleTalk:

'''LocalTalk Specifications:'''
* '''Physical layer:''' RS-422 differential signaling
* '''Data rate:''' 230.4 kbps
* '''Topology:''' Bus with daisy-chaining
* '''Maximum nodes:''' 32 devices theoretical (16 practical)
* '''Protocol:''' AppleTalk protocol stack
* '''Connector:''' Mini-DIN-8

'''LocalTalk Features:'''
* Automatic node addressing
* Collision detection and avoidance
* Network printer sharing
* Compatible with PhoneNET adapters

=== Serial Interfaces ===
The IINT provided dual serial connectivity:

'''RS-232 Interface:'''
* '''Connector:''' DB-25 female
* '''Data rate:''' Up to 19,200 baud
* '''Data format:''' 8 bits, no parity, 1 stop bit
* '''Flow control:''' XON/XOFF or hardware (RTS/CTS)
* '''Usage:''' PC connectivity, terminal access

'''RS-422 Interface:'''
* '''Connector:''' Mini-DIN-8 (shared with LocalTalk)
* '''Data rate:''' Up to 57,600 baud
* '''Protocol:''' AppleTalk or serial
* '''Cable length:''' Up to 1200 feet

'''Switch-Selectable Modes:'''
* LocalTalk (default)
* RS-232 serial
* RS-422 serial
* Diablo 630 emulation

=== ADB Port ===
Like the IISC, the IINT included an unused ADB port:

* '''Connector:''' 4-pin mini-DIN
* '''Purpose:''' Reserved for future expansion
* '''Implementation:''' Non-functional
* '''Removed:''' Eliminated in IIf and IIg models

=== Interactive PostScript ===
Accessible via RS-232 for direct control:

'''Terminal Access:'''
* Connect terminal to RS-232 port
* Settings: 19,200 baud, 8-N-1
* Type "executive" to enter interactive mode
* Direct PostScript programming possible
* Diagnostic information available