Toshiba CTX28 Direct Station Selection DSS Console/System Connection, Standard Telephones, 11-29

Station Apparatus

Direct Station Selection (DSS) Console/System Connection

Direct Station Selection (DSS) Console/System Connection

The DSS console can be connected to a BDKU/BKDS or PDKU on any circuit. DSS consoles are associated with digital telephones via system programming. This section provides instructions on how to install the consoles.

DSS Console Connections

DSS consoles are connected to BDKU/BDKS or PDKU PCBs using standard twisted single-pair or two-pair jacketed telephone cable (maximum 1000 feet, 303 meters) is used for the connection.

To accommodate the DSS console connection, the 5842

instrument end of the cable should be terminated in a modular station connector block (RJ11). Refer to Chapter 10

– MDF PCB Wiring for wiring/interconnecting details.

Notes

●DSS console cable runs must not have cable splits (single or double), cable bridges (of any length) or high resistance or faulty cable splices.

●See the appropriate Installation chapter for secondary protection information and loop limits.

CAUTION! When installing the DDSS cable, do not run the cables parallel if they are within three feet of an AC power line. AC power lines should be crossed at

right (90°) angles only. In particular, avoid running station wire pairs near devices that generate electrical noise, such as neon or fluorescent light fixtures.

Standard Telephones

This section explains how to connect standard telephones to the Strata CTX670 system. Toshiba does not provide standard telephones. Whenever standard telephones are mentioned in this manual, it refers to 500- and 2500-type standard telephones.

Note Before proceeding, see warning and caution notes in “3000-series Telephone Installation” on page 11-2.

Standard telephones connect to circuits on the Standard Telephone Interface PCBs: RSTU, RSTU2, RDSU/RSTS and PSTU via the MDF with standard twisted-pair jacketed telephone cable. (See single-pair wiring in Chapter 10 – MDF PCB Wiring for more details.)

The standard telephone cable’s overall loop resistance, connected on- or off-premises, is 300 ohms max. for PSTU; 600 ohms for RSTU and RDSU/RSTS with -24VDC (no R48S), and 1200 ohms for RSTU and RDSU/RSTS with -48VDC (R48S installed on RSTU, RSTU2, or RDSU PCB), including telephone resistance. This applies to all devices connected to standard telephone circuits.

A standard telephone connected off-premises via the telephone network should interface with OL13A, OL13B, or OL13C lines (or equivalent) and connect to an RJ21X, FIC jack or equivalent.

Station Apparatus

Strata CTX I&M 06/04 11-29