I think David NG misunderstands. This sounds like charges for calls made and/or received . If so, whether or not it is excessive depends on a) the type of contract you have and b) the number of calls made to and by the strata manager.
There are basically two types of strata management agreement. The first, and on the face of it more expensive, is all inclusive and covers all admin costs. The secon is cheaper on the face of it but ramps up its cost through Schedule B costs, like phone calls, writing letters etc etc.
If you are a settled building with not much traffic between the owners and the strata manager a Schedule B weighted contract will save you money. If you have a lot of contact with your strata manager, an all-inclusive contract may be the way to go (provided it doesn’t limit contact).
As for excessive costs, someone should ask how many phone calls that figure represents, who they were to and what they were about.