Black Box High Speed COS-4, Руководство пользователя

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HIGH SPEED COS-4 AND HIGH SPEED COS-8
4.2.2 COS
TO
S
ERIAL
P
RINTER
(
S
)
For each serial printer you want to connect to the High Speed COS-4 or
COS-8, you’ll need a cable containing at least 5 wires with DB25 male
connectors on each end. Assuming you’ve set the COS port(s) as DCE (see
Section 3.4
), the cable(s) should be wired as shown in Table 4-2 on the
previous page. (Our product code for a cable pinned this way is ECM12C.)
Connect one end of each of these cables to the input port on the selected
printer. Connect the other end to the chosen numbered port on the COS.
4.2.3 M
ODEM
(
S
)
↔
COS
We do not recommend attaching modems to the High Speed COS-4 or
COS-8, because the COSes don’t support Pin 4 (RTS), 6 (DSR), 8 (RLSD
[DCD]), or 22 (RI). When other involved devices (especially PCs running
terminal-emulation software) can’t see these pins/signals (especially Pins 8
and 22), most applications involving modems will not function correctly.
However, if the device(s) on the other side of the COS don’t need to see
any of these non-supported pins, you can attach one or more modems to
the COS, using cables containing at least 5 wires with DB25 male connectors
on each end. Assuming you’ve set the COS port(s) as DTE (see
Section 3.4
),
the cable(s) should be wired as shown in Table 4-3 on the next page. (Our
product code for a cable pinned this way is ECM12C.)
Connect one end of each of these cables to the input port on the selected
modem. If the selected modem is the “source” or “master” (the one that’s doing
the switching), connect the other end of the cable to the COS’s common
port (Port 0). If the modem is a “destination” or “slave” (one that’s being
switched between), connect the other end of the cable to the chosen
numbered port on the COS.
Some other DCEs, including some multiplexors, line drivers, and short-
haul modems, can function with only Pins 2, 3, 5, 7, and 20. You can attach
them to the COS as described in the previous two paragraphs.