• Overview
• Null Modem Jumper
• Transmitters
  • 707POE/747POE/705POE
  • 708POE
  • 709P2P
  • 717HIFI
  • 718AVP/749AMP/718KVM/749KVM/715POE
• Receivers
  • 508POE/505POE
  • 509POE
  • 518AVP/515POE

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Overview

3G Transmitters and Receivers have a null modem jumper on the bottom of the unit that flips the transmit and receive pins on the RS232 port.

The nature of RS232 is that there is always a 50% chance that you have the correct cable. By flipping the jumper, to the alternate position, you ALWAYS have the correct cable.

When using a Just Add Power Flux Capacitor IR Dongle (v1 or v2), the pins should ALWAYS be set to the Crossover position.

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Null Modem Jumper

The null modem jumper on 3G devices is a 2x3 rectangle of pins. There are two valid positions for the null modem jumper, regardless of orientation:

One position is straight-through, one position is crossover. The orientation on the null modem jumper may be different on each device.

 

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Transmitters

707POE/747POE/705POE

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708POE

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709P2P

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717HIFI

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718AVP/749AVP/718KVM/749KVM/715POE

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Receivers

505POE/508POE

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509POE

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518AVP/515POE