What does a CNR expansion slot provide?

The audiomodem riser is a riser expansion slot found on the motherboards of some Pentium III, Pentium 4, Duron, and Athlon personal computers

The slot is for modem and network cards Unfortunetly, the slots often only work with cards supplied by the motherboard mfg

6 slot duck decoy bag AMR and CNR Slots Some motherboards have one of two specialized expansion slots in addition to the standard slots depicted in Chapter 4

rent slot machines expansion slot for analog functionality Asus P3C2000