Cluster & Replicate Netbakup master server 3 site

I would like to consult about netbackup concept about Can i do?

I have 3 server by 2 server in local site , 1 server in drsite.I design 2 server in local site use VCS for cluster (1 server Active & 1 server Standby) and Replicate(VVR) to Drsite (1 server for Standby replicate catalog )

I have question.

1. Can I use Standby server  for local site promote to media server for backup in local site but still working master standby too? If cannot please recomment to me for solution.
2. Can I use Standby server  for DRsite promote to media server for backup in DRsite but still working master standby too(replicate from master) ? If cannot please recomment to me for solution.
3.  

Best regard

chakkrit.o