Installing The D928; D928 Status Leds; Figure 13: D928 Dual Phone Line Switcher; Phone Cord Lengths - Bosch D9412GV2 Operation And Installation Manual

D9412GV2/D7412GV2 | Operation and Installation Guide | 7.0
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Figure 13: D928 Dual Phone Line Switcher

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1 - Connect to ACCESSORY CONNECTOR with
ribbon cable.
2 - Green to Terminal 1
3 - Black to Terminal 9
4 - AC Power LED (green)
5 - Phone jack to primary phone line
6 - Primary Fail LED (yellow)
7 - Phone jack to secondary phone line
8 - Secondary Fail LED (yellow)
9 - Phone jack to telco connector
10 - Communications Fail LED (yellow)
11 - Buzzer
Bosch Security Systems, Inc. | 7/09 | F01U003641-04
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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 9 for phone cord lengths.
Table 9:

Phone Cord Lengths

Phone Cord
D161
D162
3. Plug one end of a D161 or 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 D161 or 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 9 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 37). 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.
Telephone Connections
Length
2.4 m (8 ft)
61 cm (2 ft)
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