Specifications

4.3.3 Manual Connection without Telephone Lines
!
This procedure requires that the cover of the DAI-2 be removed. While the voltages inside the unit should
not exceed about 12-15 VDC, even low voltages can be potentially lethal under certain conditions. This
procedure should only be performed by qualified technical personnel.
The procedure requires you to handle the DAI-2 circuit board. This board contains components that are
sensitive to static electricity. Use proper precautions when handling the circuit board.
This procedure places a 12 VDC voltage source on the modular connector J1 to power a telephone set
directly. It is important that the DAI-2 not be connected to a telephone line with the jumpers in this
position.
This method is similar to the one described in section 4.3.2 except that it does not require any telephone lines or a
cellular phone. The only hardware necessary is a telephone with a standard modular plug and two shorting jumpers or
clip leads.
• Unplug the supply transformer from the wall outlet and disconnect the telephone line and ribbon
cable connectors from the DAI-2 before starting this procedure.
• Remove the rear panel of the DAI-2 case by removing the two securing screws. Carefully slide the
circuit board out of the case and place it, component side up, on a non-metallic surface.
• Arrange three jumpers as shown in Figure 4.2 to enable the telephone voltage. If you do not have
the extra jumpers, clip leads may be used but make sure that they do not short any components.
Normal
Operation
Telephone
Voltage
Figure 4.2; Telephone voltage jumpers JP1
• Connect the telephone to the telephone line jack and carefully attach the ribbon cable so that the
unit has power. The power LED should illuminate.
DAI-2 Operation page 4. 3