AMR, CNR and ACR slots
CNR (Communications and Network Riser)
Contents
The CNR slot is located on the side of the motherboard, near the last PCI slot. As you can see comparing Figures 1 and 4, AMR and CNR devices are a little bit different, event though the slots are very similar. Not only the edge connector (the part that goes into the slot) is different, the card has a different orientation. The side that has the I/O connectors on an AMR device is located to the left, and this side on a CNR device is located to the right.
Figure 4: CNR slot location.
Figure 5: Example of a CNR modem.