System Configuration : Preferences : Synchronization Preferences : Satellites Section

Satellites Section
(Avid HDX, Pro Tools|HD, and HD Native Systems with Satellite Link Only)
These preferences are available only with the Satellite Link option. The Pro Tools Satellite Link option lets you link up to 5 Pro Tools systems (or 4 Pro Tools systems and an Avid® Media Composer® with the Video Satellite option or a Video Satellite LE system) over an Ethernet network so that you can cue, play, and stop the transport, make play selections, and solo tracks across any of the systems from any linked workstation.
Transmit Solos
Causes a linked Pro Tools system to send the solo status of its tracks to all other linked Pro Tools systems. On other linked systems that are set to receive solos, tracks follow solo behavior as if the solo were on the local system.
Receive Solos
Causes a linked Pro Tools system to receive solos from all other linked Pro Tools systems that are set to transmit solo status of their tracks. Tracks on the receiving system follows solo behavior as if the solos were on the local system.
Solo Independent of Linked State
Causes a Pro Tools system to send the solo status of its tracks to other satellite systems even when it is unlinked. This allows control of solo status across systems even when transport control is not enabled.
DAE Errors Stop All Linked Systems
Causes a DAE error on any linked Pro Tools system to stop the transport on all linked systems. When this option is not selected, linked systems will not stop if a DAE error occurs on one system.
Transmit Play Selections
Causes a linked Pro Tools system to send the Edit window selection to all other linked Pro Tools systems. On other linked systems that are set to receive play selections, the selection is mirrored in the Edit window.
Receive Play Selections
Causes a linked Pro Tools system to receive Edit window selections from all other linked Pro Tools systems that are set to transmit play selections.