POS interface is a basic capability of an AR router and is not under license control.
Feature Limitations
The 1STM1, and 4STM1 interface cards support POS interfaces.
For the mapping between the device and interface card, see or 1STM1 (1-Port 155M Packet over SDH/SONET Optical Interface Card) in the NetEngine AR Get to Know the Product-Hardware Description-Cards-POS/CPOS Card.