2. Close the device unit enclosure.
RI Power Out
Ring Indicator (RI) power out is available on all ports. The total power budget for this feature is one (1) watt not to exceed 5 volts @ up to 200mA on any single port. The following procedure assumes the unit will only be used for RI power out.
1.Set the port DIP switches to the following places: switch 1 and 3 are up and 2 and 4 are down (see "Serial Power Table" on page 77 for illustration).
2.Enable the RI power through the web interface.
3.Connect power supply with the
Note: If the unit will be used with RI power in (port 1 only), set the jumper to the following setting:
and do not use an external power source. Port 1 cannot be used for both power in and power out.
Configuring DTR Power
Power Out
Data Terminal Ready (DTR) power out is the factory default on the Digi device server. Total power budget for this feature is one watt not to exceed 9 volts @ up to 100mA to any single port.
1.Set the port DIP switches to EIA 232 (switch 1 is up, 2,3, and 4 are down) to enable DTR power.
2.Open the port and set DTR high.
Note Here are the pins to verify the jumper position. The default position has the jumper on the two pins furthest from the edge.
DO NOT MOVE THE
JUMPER FROM THE
DEFAULT UNLESS USING RI POWER IN.
If you are having trouble with your unit after using the Power over port feature, you may have tripped the circuit breaker in the unit. You can identify this by the RI or DTR signal indicators found in the System Information under Administration on the main menu in the web interface. Click the port number using serial power. (Remember serial power out is unavailable if the MEI settings are not 232.)
Under serial power will be a message if the breaker is tripped. Follow the
76 | Chapter 18 Configuring Power Over the Serial Ports |
