Filter
Top Products
118
A
PPENDIX
D: C
ABLING
R
EQUIREMENTS
Verifying Maximum
Attenuation for
Mixed Fibers
If you mix Category 1 and Category 2 receivers and transmitters, use
Table 30 to verify the maximum attenuation for each possible
combination.
*This combination is dispersion-limited rather than loss-limited. The
expected maximum length is approximately 35 km.
Example.
If a Category 2 transmitter is outputting to a Category 1
receiver, the maximum attenuation is 26.0.
DS-3 Coax Cables
Connect the CoreBuilder 7000 DS-3 interface by a 75 Ohm coaxial cable
that complies with DS-3 standards. The maximum cable length is 450
feet. To connect the DS-3 interface:
1
Prepare two coax cables - one for Tx and one for Rx. You may want to
mark the ends of the cables to identify them easily.
2
Connect both cables to the DS-3 BNC connectors on the CoreBuilder
interface. Make sure to connect Rx and Tx cables according to what is
indicated on the interface front panel.
3
Connect the two cables at the other end according to the opposite of the
first connection Rx to Tx and Tx to Rx.
Ethernet Cabling
The Ethernet port of the CoreBuilder allows you to connect the
CoreBuilder to an Ethernet network for Network Management Station
(NMS) connectivity (such as Transcend™). The Ethernet port is a standard
RJ-45 connection of a terminal side.
Follow these guidelines for 10BASE-T cabling:
■
Use only copper, unshielded twisted-pair (UTP) wiring. Do not use flat,
multiconductor cable (for example, silver satin), which is often
identified by solid colors such as red, green, yellow, or black.
Table 30
Acceptable Cable Plants for Combination of Categories 1 and 2
Output Category Input Category
Minimum Loss
(dB)
Maximum
Attenuation (dB)
1 1 0.0 10.0
1* 2* 1.0 16.0
2 1 14.0 26.0
2 2 15.0 32.0