Cisco PA-POS-OC3SMI 1-Port Packet/SONET OC-3c/STM-1 155-IR Single-Mode (IR) Port Adapter
OC-3 / STM-1 OC-12 / STM-4 Analyzer for PoS Mode
Packet Guide SONET/SDH | PPT
Ethernet Card Software Feature and Configuration Guide for the Cisco ONS 15454, Cisco ONS 15454 SDH, and Cisco ONS 15327, Release 7.2 - Chapter 20, POS on ONS Ethernet Cards [Cisco ONS 15454 Series Multiservice Provisioning Platforms] - Cisco
Cisco PA-POS-OC3SMI OC3 PACKET OVER SONET Adapter | eBay