ABR 11.5 Advanced Workstation - reduce communication between AMS and it's clients

Hi there,

I have backup plans, with only local backups, monitored by the AMS.
While a backup plan is executing on a client, the client and the AMS are communicating all the time.
For me it's a problem, because I`m doing full backups, which take about 30 min an I will have a lot of client pc's.
I've monitored the communication to a client pc, with a 3rd party network monitoring tool.
It's not a big amount of data, but it's constant. I don't know if it's exact but I see a peak in communication every 2 min, while task is executing on a client pc.
So I want to limit/reduce this communication. The client should submit its status only every 5 or 10 min (or the AMS should ask for it in that interval).
How can I do that? Whats the exact registry entry on the AMS for this?
Or can I limit it in any other way - like the clients should only message the AMS, when they start or finish a job?