INSTALLATION-DK8 KSU & PCB

 

 

SECTION 100-816-204

 

 

 

MARCH 1993

 

 

 

J1

 

J4

 

 

 

 

QSTS

 

 

QSTS

FACTORY

 

 

INSTALLED

J5

 

J6

 

 

 

 

QSTU

 

190

130

 

 

SW1

 

 

 

J3

J2

 

FIGURE 4-10

QSTU CONTROLS AND INTERFACE CONNECTORS

Dual-Tone Multi-Frequency (DTMF) tones gener- ated by a standard telephone (or any other device connected to a standard telephone circuit (QSTU)), and it is required for Direct Inward System Access (DISA) calls. The QRCU circuits are also used to detect busy tone for the Automatic Busy Redial (ABR) feature and must be installed to allow ABR to operate.

9.02The QRCU is shown in Figure 4-11.

9.10QRCU Configuration

9.11The QRCU does not have to be configured for operation.

9.20QRCU Installation Procedure

9.21Install the QRCU in accordance with the

4-14

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Toshiba DK 16, DK8 manual Qrcu Configuration, Qrcu Installation Procedure, Qsts Factory Installed Qstu, SW1