Interpersonal communications services only cover communications between a finite, that is to say not potentially unlimited, number of natural persons, which is determined by the sender of the communication.
Ní chumhdaítear le seirbhísí cumarsáide idirphearsanta ach cumarsáid idir líon finideach daoine nádúrtha, is é sin le rá líon nach bhféadfadh a bheith neamhtheoranta, a chinneann seoltóir na cumarsáide.