Hardware Installation Manual 52 Document #: LTRT-94720
Mediant 3000
Care in Handling Fiber Optic Cabling:
1. When handling fiber optic cables, be sure to implement the following:
√ Excessive bending of the Fiber Optic Cable can cause distortion and signal losses.
√ Ensure the minimum bending radius recommended by the Fiber Optic Cable
supplier.
√ Maximum Fiber Optic cable length for multimode fiber is 550 m.
2. Incoming optic cabling from the network infrastructure can originate from the top of
the rack or from another shelf within the rack. Preserve the minimum-bending ratio
indicated by the cable manufacturer.
3. To ensure full high-availability capabilities, the configuration of the interface to the IP
backbone must include certain redundant features from which two separate fiber optic
cables are entering the device.
To connect the STM-1/OC-3 PSTN interface:
1. Remove the protective dust plug from the device's SFP transceiver module.
2. Connect a twin, single-mode fiber optic cable with LC-type plugs to the STM-1/OC-3
PSTN SFP transceivers (labeled PSTN - A).
3. For redundancy, connect a twin, single-mode fiber optic cable with LC-type plugs to
the second pair of STM-1/OC-3 SFP transceivers (labeled PSTN - B).
Figure 5-1: Connecting the PSTN Fiber Optic Interface
Note: To ensure full 1+1 redundancy protection, two pairs of fiber optic cables must be
connected to corresponding PSTN connectors on RTM-6310 (i.e., PSTN ports A and B).
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