Digital Equipment DEC 3000 500X AXP Owner's Manual page 237

Equipment Between the Approved Module and a Digital Circuit (PTT)
Equipment Between the Approved Module and a Digital
Circuit (PTT)
Equipment If any other equipment, including cables or wiring, is to be
Requirements connected between the 54-21147 module and the point of
connection to any particular digital circuit, that equipment must
conform as follows:
•
•
The overall transmission characteristics of all other
equipment must not have any material effect on the
electrical conditions between the equipment and the digital
circuit.
All other equipment must comprise only the following:
Approved equipment, which may be subject to limitations
on its use, for the purpose of connection between it and a
particular digital circuit.
Cable or wiring that complies with a code of practice for
the installation of equipment covered by this standard or
other requirements that may be applicable.
Special Information for PTT Network Users E–9