Qrcu Configuration; Qrcu Installation Procedure; Qstu Controls And Interface Connectors - Toshiba Strata DK 16 Installation And Maintenance Manual

INSTALLATION-DK8 KSU & PCB
SECTION 100-816-204
MARCH 1993
J1
J5
190 130
SW1
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.
J4
J6
J3 J2
QSTS
QSTU
9.02 The QRCU is shown in Figure 4-11.

9.10 QRCU Configuration

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

9.20 QRCU Installation Procedure

9.21 Install the QRCU in accordance with the
4-14
QSTS
FACTORY
INSTALLED