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CHAPTER 4: Checklist of System Components
4.2.4.C Switches with Other Types of Composite CPU Ports
The CPU ports of some ServSwitch family KVM switches are composite (all-in-one)
interfaces that are not the same as those on the regular ServSwitch, but the
principle for connecting them is the same:
• The CPU ports on the CPU Cards of the ServSwitch Multi are HD44 female
connectors. You’ll need a ServSwitch Multi Server Cable such as product code
KV2020-R2 (for just KVM extension) or KV2040-R2 (for KVM, serial, and/or
audio extension) for each of the switch’s CPU ports you’re attaching.
• The CPU ports on the ServSelect are DB25 connectors pinned
differently from
the DB25 connectors on the regular ServSwitch. You’ll need a ServSelect Cable
(product code EHN056) for each of the switch’s CPU ports you’re attaching.
4.2.5 T
O
C
ONNECT A
L
OCAL
H
UB TO
R
EMOTES
To connect the Rackmount Extender Local Hub to your Remotes, you’ll need
industry-standard structured cabling (Category 5 UTP or STP, 4-pair) terminated
with RJ-45 plugs. You’ll need CAT5 patch cables such as product code EYN737MS
or CAT5 bulk cable such as our EYN840A. The bulk cable should be terminated
with high-quality RJ-45 plugs such as those included in our FM732 25-pack.
CAUTION!
This cable
must
be solid-core type; stranded patch cable will give poor
results over longer distances. The pairing of the cable and pinning of its
connectors must be in accordance with EIA/TIA-568A or (preferably)
EIA/TIA-568B. (Refer to the wiring chart in
Appendix A
. Please note that
failure to wire the twisted pairs correctly will dramatically impair video
quality and possibly prevent correct operation.)
Although most CAT5E cables will work well with the Extender,
especially for shorter runs and patch cables, some CAT5E cables might
distort the video if you use them for local-to-remote runs longer than 120 m
(400 ft.). And you should
avoid
using “Level 6” or “Level 7” cables, or other
types of cable rated for data rates higher than 100 Mbps (bandwidths higher
than 100 MHz). This is because the wires in these cables are twisted much
more tightly than those in regular CAT5, which is great for high-speed data
but
really bad
for analog video signals. Having said that, however, the
signal-skew problems caused by tightly twisted pairs in these cables can
sometimes be resolved by swapping which pairs are used for which signals
or by using an external delay line. Please contact Tech Support if you have
problems getting a good picture with CAT5e cable or if you
must
use
cables with bandwidths higher than 155 Mbps.
Also, even though your network might use the same type of 4-wire
twisted-pair cabling, do
not
connect the Rackmount Extender to
10/100BASE-T Ethernet devices or
any
other network equipment. Doing so
will virtually destroy the Extender’s circuitry and could also damage the
attached equipment.
