A SERVICE OF

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D
Special Information for PTT Network Users
Appendix Overview
Introduction
The United Kingdom and other countries require that certain
installation information be provided about the communications
54-21813 module, which is hosted within the DEC 3000 Model
600/600S/700 AXP system.
In This
Appendix
This appendix describes the appropriate installation information
for the 54-21813 module and provides the following information:
Service Categories
Host Power Rating
Module Isolation
Safety Status
Cable Approval
Supported Cables
Equipment Between the Approved Module and a Digital
Circuit (PTT)
Special Information for PTT Network Users D–1