In telecommunication, a customer service unit (CSU) is a device that provides an accessing arrangement at a user location to either switched or point-to-point, data-conditioned circuits at a specifically established data signaling rate.
... while "caturtitatpurusha" is a karmadhariya, being both dative, and a tatpurusha.
The verbs tenses (a very inexact application of the word, since more distinctions ...