A major subject of this book is the IBM Communications Manager/2 (CM/2), an IBM software product that runs under the OS/2 operating system on 32-bit PC systems, providing connectivity to IBM mainframe systems and networks. The book’s emphasis is on interoperability, however, and other communications software is also discussed, providing access to Novell networks and to DEC VAX systems.

The book consists of four parts (18 chapters in all) and two appendices. Part 1 discusses physical connectivity options for host-to-local-area-network connections. Chapter 1 explains the basic concepts of IBM networking; it is followed by five chapters that contain substantial amounts of practical, technical information in a condensed but understandable form.

Part 2 (chapters 7 through 11) looks at 3270 connectivity, covering the details of configuration for an IBM host and for an OS/2 workstation running CM/2 and Network Transport Services/2. It discusses Advanced Peer-to-Peer Networking, physical unit emulation, and printer support. Again, the emphasis is on real, useful information for the system implementor and maintainer.

Part 3 (chapters 12 to 15) looks at the problems involved in the coexistence of LAN connectivity and host access on the same OS/2 workstation, with particular reference to the use of Novell Netware. The various solutions, all with their own advantages and disadvantages, are clearly explained, and are accompanied by detailed advice and sample configurations.

Part 4 continues the interoperability theme, looking at various products that offer connectivity to DEC VAX systems by running IPX over Ethernet. Although this material seems moderately useful, it is not directly related to the subject matter of the rest of the book, except as another example of interoperability.

Appendix A covers a few utility programs available with OS/2 and CM/2. There is little material here, and in any case it is well documented by the systems themselves. Appendix B covers common networking questions and answers; although it is only a few pages long, the material appears useful.

Generally, this is a good nuts-and-bolts book that also provides good background information. It includes a good number of examples and step-by-step instructions. While reviewing the book, I had cause to refer to one section for some practical advice, and can vouch for its usefulness.

I recommend this book to anyone who is involved with connecting OS/2 systems to IBM or Novell networks, or who might wish to connect such networks to DEC VAX systems. It gives a good overview of what is possible, what is needed, and what to do to make it all work.