An employer may have one plan for each broker/dealer that handles their empoyees 403B accounts. You have 3 types of options available.
If you stay within the existing plan but change asset allocation (ie stay with the same employer and the same broker/dealer), this is called a contract to contract exchange.
If you transfer between plans (ie stay with the same employer but change broker/dealers), whether you keep the current asset allocation or change asset allocations, this is called a plan to plan transfer.
Finally, if you leave the plan, which typically can only occur after leaving the company, this is called a rollover.
For rollovers, you have direct and indirect rollovers. Typically, indirect rollovers are easier because you become the middle man which simplifies communication between you and each individual broker/dealer. However, it can take longer to process.
