2901190 and 2901200 User’s Manual
Page 42
Figure 3-3: Jumper Locations
3.8.1 JP3: COM3 Pin-9 Signal Select Jumper Settings
The COM3 pin-9 signal can be selected as 12V, 5V or Ring.
JP3 Description
Short 1-2
COM3 pin-9 is 12V output
Short 3-4
COM3 pin-9 is RI input
Default
Short 5-6
COM3 pin-9 is 5V output
Table 3-3: COM3 Pin-9 Signal Select Jumper Settings
3.8.2 JP4: COM1 and COM2 Pin-9 Signal Select Jumper Settings
The COM1 and COM2 pin-9 signal can be selected as 12V, 5V or Ring.
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