D9412GV4/D7412GV4 v2.03 | Installation and System Reference Guide | 7.0 Telephone Connections
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Bosch Security Systems, Inc. | 7/16 | F01U265457-09 41
7.11.3 Installing the D928
Mounting
Mount the D928 on the lower right side of the
enclosure using the screws provided with the
switcher.
Wiring
The D928 has two flying leads. The green lead
monitors AC power. The black lead is the ground
reference for the AC Power LED.
1. Connect the green lead from the D928 to
Terminal 1.
2. Connect the black lead from the D928 to
Terminal 9.
Telephone Connections
1. Plug one end of the ribbon cable provided
into J4 on the D928. Plug the other end of the
ribbon cable into the ACCESSORY connector
on the control panel.
2. Plug one end of the D162 phone cord
provided into the TELCO jack. Plug the other
end of the phone cord into the TELCO jack on
the control panel. Refer to Table 10 for phone
cord lengths.
Table 10: Phone Cord Lengths
Phone Cord Length
D162 2 ft (61 cm)
3. Plug one end of a D162 phone cord into J1 on
the control panel. Plug the other end of the
phone cord into the RJ31X or RJ138X for the
primary telephone line.
4. Plug one end of a D162 phone cord into J2 on
the control panel. Plug the other end of the
phone cord into the RJ31X or RJ138X for the
secondary telephone line. Refer Table 10 for
phone cord lengths.
7.11.4 D928 Status LEDs
Four LEDs mounted on the front edge of the
D928 Module show the status of AC power for
the control panel, the status of the two telephone
lines, and communication failure (Figure 11 on
page 39). When programmed and operating
normally, only the green AC power status LED is
lit.
AC Power LED
The green AC Power Status LED lights when AC
power is applied to Terminals 1 and 2 on the
control panel.
Phone Line Fail LEDs
Two yellow Phone Line Status LEDs (one for the
primary telephone line, one for the secondary
telephone line) light if the telephone line is not
within the operating range. The control panel
monitors the faulty telephone line for the
programmed interval before indicating a trouble
condition. Refer to Section 7.8 Telephone Line
Monitor on page 38 for a description of phone
line monitor operation.
Communication Failure LED
The yellow Communication Failure LED lights
when the system is in communication failure. The
LED turns off when communication restores.
Refer to Section 7.10 Communication Failure on
page 39.
Dedicated telephone lines might be
required for UL 864 Commercial Fire
applications. Check with your
Authority Having Jurisdiction (AHJ).
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