... indication goes as the following: Slot 1: network management card Slot2: STM-1 optical interface card with 1+1 protecting function. Slot3: ... for connection) Slot5~15: common function cards Slot16~17: power card In the smallest system, slot5 offers single E1 channel, slot ... through the interface card so that it can connect with the original devices.6). Have the centralized network management system to ...