Toshiba DK8 Kcdu CONTROLS, INDICATORS, and Connectors, Dtmf RECEIVER/ABR Tone Detector Unit K4RCU

			INSTALLATION-DK 16 KSU & PCB
			SECTION 100-816-205
			MARCH 1993
		TABLE 5-H
	KCDU CONTROLS, INDICATORS, AND CONNECTORS
CONTROL/INDICATOR/
CONNECTOR		TYPE OF COMPONENT	DESCRIPTION
(Figure 5-21)
CO line circuit 1		Red LED	Lights to indicate CO line circuit 1 is in
Indicator CD517			operation.
CO line circuit 2		Red LED	Lights to indicate CO line circuit 2 is in
Indicator CD617			operation.
J7 Connectors		Modular connector	Interface connector for CO line circuits,
			1 and 2.
PAD Switch SW501		Two-position slide	Enables 3dB signal level drop for CO line
			circuit 1 (when set in PAD position).
PAD Switch SW601		Two-position slide	Enables 3dB signal level drop for CO line
			circuit 2 (when set in PAD position).

4)After installing the KCDU, gently pull the PCB outward. If the connectors are properly mated, a slight resistance will be felt.

13.30KCDU Wiring

13.31Refer to KCDU Wiring Diagram in Section 100-816-208for wiring/interconnecting details.

13.40KCDU Programming Overview

13.41See the PCOU programming overview and the PDKU overview in this chapter for KCDU pro- gramming information. When running Program 03 for the KCDU slot(s), specify code 65 if the KCDU does not support OCA or PDIU-DI telephones or code 66 if the KCDU supports OCA or PDIU-DI telephones. Do not specify code 11, 61, 62, or 64.

14 DTMF RECEIVER/ABR TONE

DETECTOR UNIT (K4RCU)

14.00 General

14.01The K4RCU must be installed to recognize Dual-Tone Multi-Frequency (DTMF) tones gener- ated by a standard telephone (or any other device

connected to a standard telephone circuit) and it is required for Direct Inward System Access (DISA) calls. The K4RCU can only be installed in the Base Unit. The K4RCU circuits are also used to detect busy tone for the Automatic Busy Redial (ABR) feature and must be installed to allow ABR to operate.

14.10K4RCU Configuration

14.11The K4RCU does not have to be configured for operation.

14.20K4RCU Installation Procedure

14.21Install the K4RCU in accordance with the following steps (Figure 5-22).

1)Remove the PCB from its protective packag- ing.

2)Make sure that the power supply switch is OFF.

3)Making sure that the component side of the K4RCU is facing up toward the power supply, plug the K4RCU P602A and P602B female connectors into the P2A and P2B (K4RCU) connectors on the motherboard.

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