Apple Macintosh System 7.5 - Manual (Page 32)

Upgrading network drivers on System 6 computers
To upgrade EtherTalk drivers on Macintosh computers that are not being
upgraded to System 7.5, use the EtherTalk software (version 2.0 or later) and
instructions furnished with the EtherTalk NB Card or the Ethernet LC Card.
Internet routers
A Macintosh computer used as a router does not need to be upgraded to
System 7.5 to work with System 7.5 computers on the network.
Hardware-based routers that support AppleTalk Phase 2 are also compatible
with System 7.5.
If a Macintosh is being used exclusively as a router, no benefit is derived from
upgrading this Macintosh to System 7.5.
Determining whether a router supports AppleTalk Phase 2
The Apple Internet Router 3.0 (or later) from Apple Computer supports
AppleTalk Phase 2 only. (The earlier AppleTalk Internet Router 2.0 is no
longer recommended.)
For non-Apple routers, check the product documentation or contact the
router’s manufacturer or the dealer.
Software or hardware upgrades for routers
The process of upgrading a router to AppleTalk Phase 2 depends on the type
of router and its manufacturer.
The Apple Internet Router 3.0 assumes that your network is already Phase 2.
Refer to the documentation for the router for additional information.
All major vendors of internet routers for AppleTalk networks offer AppleTalk
Phase 2 upgrades for their Phase 1 routers. Contact the dealer or
manufacturer of your routers about upgrades.
29 Planning the Group Upgrade