User guide

March 2005 Building Your Canopy Network
Through Software Release 6.1
Page 136 of 425 Issue 1
Canopy System User Guide
16.2.7 Standards for Wiring
Canopy modules that are currently available automatically sense whether the Ethernet
cable in a connection is wired as straight-through or crossover. You may use either
straight-through or crossover cable to connect a network interface card (NIC), hub,
router, or switch to these modules. For a straight-through cable, use the EIA/TIA-568B
wire color-code standard on both ends. For a crossover cable, use the EIA/TIA-568B wire
color-code standard on one end, and the EIA/TIA-568A wire color-code standard on the
other end.
Some modules that were sold earlier do not automatically sense the wiring scheme. To
identify whether an older module senses the Ethernet cable type, compare the ESN of
the module to the ESNs listed in Table 37.
Table 37: Cable scheme auto-sensing per MAC address
Module Type
MAC Address (ESN)
of Non Auto-sensing
Module
MAC Address
(ESN) of Auto-
Sensing Module
900-MHz, 2.4-GHz, and
5.4-GHz modules
(no ESNs) (all ESNs)
5.2-GHz Modules ≤ 0A003E0021C8 ≥ 0A003E0021C9
5.7-GHz Modules ≤ 0A003EF00F79 ≥ 0A003EF00F79A
CAUTION!
Where you use a non auto-sensing module
◦ use a straight-through cable to connect to a NIC (network
interface card).
◦ use a crossover cable to connect to a hub, switch, or router.
Where you use the Canopy AC wall adapter
◦ the +V is +11.5 VDC to +30 VDC, with a nominal value of +24 VDC.
◦ the maximum Ethernet cable run is 328 feet (100 meters).
16.2.8 Best Practices for Cabling
The following practices are essential to the reliability and longevity of cabled connections:
◦ Use only shielded cables to resist interference.
◦ For vertical runs, provide cable support and strain relief according to applicable
regulations.
◦ Include a 2-ft (0.6-m) service loop on each end of the cable to allow for thermal
expansion and contraction and to facilitate terminating the cable again when
needed.
◦ Ensure that all connections are properly crimped.