Specifications

2240 Fiber Optic Modem
23
2.2.2 Internal Control Switches
An 8-position DIP switch located on the modem board provides access for internal
control options (see Figure 2-3). Switch positions 1 through 6 provide the follow-
ing options:
• Carrier Detect (CD) Signal Options (1 and 2)
• Clocking Options (7 and 8)
External Clock Mode, switch position 7, and the Divide Ratio Table Select, switch
position 8, are described in Section 2.2.2.2.
NOTE: The nomenclature used for this switch is "off" equals "open."
Factory switch settings are shown in Figure 2-3.
Figure 2-3.
Eight-Position
Internal Options
DIP Switch