Comtech EF Data VMS v3.12.x Vipersat - Manual (Page 435)

Appendix C - Redundancy C-25
MN/22156, rev 12 N:M Hub Modem Redundancy
Figure C-22 Enable Hearbeat in VMS, CDM-570/570L (left), SLM-5650A (right)
Right-click on the device again and from the drop-down menu select Config-
ure. On the Vipersat tab, shown in figure C-23, check the Enable Heart Beat
box. Click the OK button to continue.
Figure C-23 Enable Heat Beat, CDM-570/570L Modem
Force registration on the device. On the next PLDM, the Status in the group
window should turn green and change to OK.