INSTALLATION-WIRING DIAGRAMS SECTION 100-816-208 MARCH 1993

BUILDING #1

QSTU

PESU

KSTU

PSTU

DK8 KSU

DK16 KSU

BASE UNIT

QCDU

PDKU

PEKU

PESU

KCDU

DDCB

DK8 KSU

DK16 KSU

BASE UNIT

KCDU

PCOU

QCDU

BUILDING #2

STANDARD

TELEPHONE

OR OTHER

DEVICEHESB

DSS

DIGITAL OR

ELECTRONIC

CONSOLE

TELEPHONE

(DK16 only)

 

DIGITAL OR

ELECTRONIC

TELEPHONE

MDFB

Secondary protectors

CO LINE

FIGURE 8-1

SECONDARY PROTECTOR DIAGRAM

IMPORTANT!

To protect against transient voltages and currents, secondary protectors must be installed if there is outside wiring (Figure 8-1). These protectors, which contain fast semiconductors in addition to fuses, shall comply with the requirements for secondary protectors for communication circuits, UL 497A. As of October 1, 1990, the following manufacturers offer secondary protectors that are UL listed.

8-5

Page 199
Image 199
Toshiba DK8 Secondary Protector Diagram, INSTALLATION-WIRING Diagrams -816-208 March, Digital or Electronic Telephone Mdfb