MDF PCB Wiring

Station Wiring Diagrams

Station Wiring Diagrams

Building #1

 

Building #2

 

 

 

 

HESB

PSTU

 

Standard

 

RSTU/RSTU2/

 

 

 

Telephone

 

RSTU3/

 

 

 

 

 

RDSU/RSTS/

 

 

 

ASTU/BSTU

 

 

 

 

 

DDSS

Digital

 

 

Console

Telephone

 

 

Digital Telephone

 

 

 

or Cordless Base

 

ADKU,

 

Console Handset

BDKU/BDKS,

 

 

 

BWDKU

 

 

PC

or PDKU

 

 

 

BATI

Attendant

 

DDCB

 

Console

 

 

 

 

MDFB

 

 

 

DDCB

MDFB

 

 

 

RDTU,

 

 

 

BPTU

CSU

 

6687

or RPTU

T1 Span Line or ISDN PRI Line

Earth Ground

REMU

E&M Tie Line (to PSTA)

RDDU

DID Line

 

 

PCOU, RCOU/RCOS

 

 

 

 

 

Ground/Loop/ISDN BRI/ (to PSTA)

 

 

RGLU, RCIU/RCIS,

 

 

 

 

 

 

E911 CAMA Lines (Gas tube secondary

 

 

RBUU/RBUS,

 

 

 

 

 

 

protectors provided on the interface cards

 

 

 

 

 

 

 

 

 

 

RBSU/RBSS,

 

 

 

 

 

 

 

 

 

 

 

 

per UL requirements.

 

 

RMCU/RCMS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Secondary protectors – standard voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Earth Ground

 

 

Secondary protectors – low voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Important! To protect against transient voltages and currents, solid state secondary protectors must be installed if there is outside wiring, 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 protectors precisely to the installation instructions of the manufacturer.

Figure 10-1 Strata CTX Secondary Protector Diagram

10-4

Strata CTX I&M 06/04

Page 376
Image 376
Toshiba CTX28 manual Station Wiring Diagrams, 10-4