I'm confused with the product of Cisco CRS-1 Single-Port OC-768c/STM-256c POS Interface Module.
The problem is that what this module uses: OC768 or OC768c. It seems to support OC768c according to its datasheet, but the order information is Cisco CRS-1 1-Port OC-768/STM-256 POS/DPT Interface Module, where it is OC-768 without 'c'.
Whether it supports OC768 or OC768c is vital to my project.