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'.
Cisco CRS-1 1-Port OC-768/STM-256 POS/DPT will be using OC 768c as after Oc 768 it is mentioned POS/DPT. POS/DPT cards are OC-XXXc cards.
This is part number for (CHOC48/DS3-SR-SC )
Cisco 1-Port Channelized OC-48 line card where they donot mention POS/DPT after the card means this is OC-48 card using)OC48 not OC48c.
Hope ur confusion is over now.