Owner`s manual

o Direct connections to shielded or unshielded twisted pair Token Ring

local area networks via Token Ring controllers.

o Asynchronous connections to the network via serial lines, using the

personal computer's asynchronous communications adapter as the phys-

ical link.

PATHWORKS for DOS supports the Digital Data Communications Message Pro-

tocol, Version 4.1 (DDCMP) for full-duplex transmission in point-to-

point operation. An asynchronous connection to the network is accom-

plished over a serial line, using the personal computer's asynchronous

communications adapter as the physical link. The adjacent system must

be a DECnet Phase IV, full-function (routing) node, supporting asyn-

chronous DDCMP (for example, DECrouter 200, DECnet-VAX). DDCMP pro-

vides error detection/correction and physical link management facil-

ities. Neither half-duplex mode nor multi-point tributary operation

is supported.

PATHWORKS for DOS software utilizes Ethernet or Token Ring as its phys-

ical media type through the use of an Ethernet or Token Ring controller

in conjunction with Digital's baseband Ethernet components or selected

Token Ring components.

PATHWORKS for DOS supports internetworking between local and/or re-

mote Token Ring and/or Ethernet local area networks via a supported

internetworking device.

Token Ring Source Routing and Arbitrary MAC Addressing Support

In a Token Ring environment, PATHWORKS for DOS provides for DECnet source

routing support. PATHWORKS for DOS, Version 4.1B clients can commu-

nicate with PATHWORKS for VMS and/or OS/2 servers spanning multiple

rings connected by source routing bridges.

PATHWORKS for DOS V4.1B also allows use of applications that utilize

arbitrary MAC addressing in a Token Ring environment. Applications that

modify the network node address are supported; that is, those appli-

cations that adhere to IBM addressing policies, such as in some 3270

support environments, are supported in a PATHWORKS, DECnet, Token Ring

environment.