Data Domain Replication to Remote Site

Hi,

We've two Data Domain currently.

DC- DD670 - Total Capacity: 50.15 TB, Used: 30 TB

DR- DD2500 - Total Capacity: 31.23 TB, Used: 30 TB

Need 3rd Protection to Remote Site. WAN Speed: 4 Mbps, Latency: 140 ms.

Initial Replication Size : 30 TB

Daily Change: ~200 GB (Post-Comp)

Replication Type: VTL (Pool Replication)

If we place a DD2500 or DD6300 at 3rd Site, is this bandwidth is enough for Daily Replication ?

(We can put DD initially at same site for first sync)

If not how much bandwidth required for this solution ?

or Is there any alternate solution for 3rd site apart from DD ?

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Varunraj