Toshiba Strata DK 280 Installation Manual page 280

BUILDING #l
BUILDING #2
I
STANDARD
TELEPHONE
HDSS OR
DDSS
CONSOLE
p HERB
ELECTRONIC
OR DIGITAL
TELEPHONE
ELECTRONIC OR
DIGITAL TELEPHONE
CONVENTIONAL
-9
I
Tl SPAN LINE
DKOO
*
E&M TIE LINE
GROUND/LOOP
CO LINE
protectors - standard voltage
0
Secondary protectors - low voltage
h*
* See Chapter 3-Cabinet Installation,
Figure 7-I
Secondary Protector Diagram
IMPORTANT!
To protect against transient voltages and currents, solid state secondary protectors must be installed if
there is outside wiring (Figure 7-l), and on all DID and E&M tie lines. These protectors, which contain
fast semiconductors in addition to fuses, shall comply with the requirements for secondary protectors for
communication circuits, UL 497A. Care must be taken to ensure that they are very well grounded to a
reliable earth ground. Recommended protectors are available in the fast Series 6 line from Oneac Corp,
Libertyville, Illinois 60048, 800-327-8801. Install and test the secondary protect&s precisely to the
installation instructions of the manufacturer.
7-6
January 1996