One thing that many people seem to miss is that there’s a network limitation regarding how poor WAN link you can have to a remote office or site.
Scenario: You have a primary DPM server protecting your production environment. You also have a remote site that is great for offsite replication to a secondary DPM server. However, there’s a limit regarding how poor wan link you can have between those two sites. If the scenario fits your design you must have a WAN link higher than 512 kb.