Dell R510 server dialing 500 channels

We just setup a Dell R510 server. We have been able to dial 500 channels. Specs:
Dell R510
2x Xeon 8 core (16 cores total)
32GB RAM
2x 450GB 15K SAS drives (RAID 1)
Centos 6.4
Newfies 2.3.1
Piratel SIP trunk provider
100MB internet connection
Dell R510
2x Xeon 8 core (16 cores total)
32GB RAM
2x 450GB 15K SAS drives (RAID 1)
Centos 6.4
Newfies 2.3.1
Piratel SIP trunk provider
100MB internet connection