appletalk(7)                                         appletalk(7)



NAME
     appletalk - interfaces for AppleTalk protocols

DESCRIPTION
     AppleTalk for A/UX provides high-performance EtherTalk
     connectivity for systems that have a built-in Ethernet port
     or a port supplied by an add-on Ethernet card.

     For systems that do not have an Ethernet port, AppleTalk for
     A/UX supports communication with LocalTalk devices through a
     network connection from the standard Macintosh printer port.
     With support for both types of printer connections (standard
     printer port or optional Ethernet port), A/UX has the
     ability to print to an AppleTalk device, such as a
     LaserWriter printer, in any Macintosh hardware
     configuration. Macintosh applications expect to use
     AppleTalk to print to AppleTalk printers, making such
     support critical.

     In A/UX, the lpr print-spooling command uses an AppleTalk
     print device by default (selectable from the ``Chooser'' as
     described in the ``Printing'' chapter in A/UX Essentials (or
     in Basic Skills if you have an Apple Workgroup Server 95).
     You can temporarily specify a different printer by using the
     -P option for lpr.  AppleTalk printing without spooler
     intervention is also supported from the command line as
     described in atprint(1M).

     Any user can switch between LocalTalk to EtherTalk by means
     of the Network control panel.  When LocalTalk is in use, the
     active device file is /dev/appletalk/lap/localtalk0/control.
     When EtherTalk is in use, the active device file is
     /dev/appletalk/lap/ethertalk0/control.

     For systems with an Ethernet port, the A/UX kernel can
     provide TCP/IP network services concurrently along with
     EtherTalk network services over one Ethernet port.  However,
     only one kind of AppleTalk service is available at a time.
     Accordingly, AppleTalk devices connected through the printer
     port are not supported at the same time that devices
     connected through an Ethernet port are being reached through
     EtherTalk.

     AppleTalk for A/UX implements AppleTalk Phase 2 (see Inside
     AppleTalk).  AppleTalk Phase 1 is not supported.  Phase 2
     affords extended addressing, reduced network traffic, and
     improved routing.

AppleTalk Modules
     When the appletalk module is requested as part of the
     creation of a new kernel (see newconfig(1M)), several
     lower-level modules are installed as necessary to match your



March 1993                                                      1

appletalk(7)                                         appletalk(7)



     Ethernet hardware configuration:

     adsp Contains the STREAM module AppleTalk Data Stream
          Protocol.

     at_atp
          Contains the STREAM module for the AppleTalk
          Transaction Protocol (ATP).

     at_sig
          Contains the STREAM module for asynchronous ATP
          operations based on UNIX signals.

     ddp  Contains the module for the AppleTalk Datagram Delivery
          Protocol (DDP).

     elap Contains the module for the EtherTalk Link Access
          Protocol.

     llap Contains the module for the LocalTalk Link Access
          Protocol.

FILES
     /dev/appletalk/ddp/socket
          Device file containing the AppleTalk for A/UX socket
          driver
     /dev/appletalk/lap/ethertalk0/control
          Device file for AppleTalk communication using EtherTalk
     /dev/appletalk/lap/localtalk0/control
          Device file for AppleTalk communication using LocalTalk
SEE ALSO
     newconfig(1M) in A/UX System Administrator's Reference

     Inside AppleTalk

     Network Applications Programming



















2                                                      March 1993