CN 3960 Hardware Installation Guide
35
I
NSTALLATION
I
NTERFACE
C
ABLING
2
Do Not
:
•
Use electrical tape or any other type of tape to secure cables.
•
Run cable in power conduits or air plenums.
•
Overstress cables by overtightening cable ties or stapling cables to the point where
crushing is visible. This is particularly applicable for fiber optic cables.
•
Exceed the minimum bending radius for fiber optic cables.
•
Install cables near sources of electrical interference. All twisted pair wires (Shielded
Cat 5e cables) must be at least 3 feet away from fluorescent light boxes and other
sources of electrical interference such as a power source.
NOTE:
Fiber optic cables are not affected by electrical interference.
Connecting Cables to the CN 3960
When connecting cables to the CN 3960, always make only one connection at a time.
Ciena recommends that cables be connected in the following order:
•
Fiber cables first
•
Shielded Cat 5e cables last
In order for two devices to communicate properly, the transmit ports on th e first device
must be connected to the receive ports of the second device.
Fiber Optic Cables
There are two types of ports on the CN 3960 that accept pluggable optics:
•
10 Gigabit Ethernet port with XFP connectors
•
10/100/1000 Mbps subscriber ports with SFP connectors
NOTE:
The subscriber ports have a dual connector and can use both a pluggable SFP or
an RJ-45. For more information see the
10/100/1000 Mbps Ports
section on page 13.
The XFP/SFP pluggables in the CN 3960 allow you to select the port speed, wavelength,
etc to match the device on the terminating end. See the
XFP / SFP Tr ansceivers
section
on page 32 for more information about the transceivers, and their installation.
The ports with XFP/SFPs will require optical cables. You will need to know the
specification of the optic to select the appropriate cable.
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