Sun Microsystems Netra t1 100, Руководство пользователя и администратора

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Chapter 6 Connecting the Cables 53
Cross-overs for Connecting to a Terminal Server
The serial ports on the Netra t1 are DTE ports. If you are connecting them to other
DTE ports, then the cabling between the devices you are connecting to each other
needs to perform a cross-over.
Note –
Do not use the Serial A/LOM port for modem connections. The DTE signal
on this port changes temporarily to DCD when the Netra t1’s LOM (Lights-Out
Management) device reports an event on the serial port. This can result in the loss of
a modem connection. If you are connecting the Serial A/LOM port to a Terminal
Server, disable modem control on the Terminal Server port.
The pinouts for the Netra t1’s serial ports correspond with the pinouts for the RJ45
ports on Cisco Terminal Servers. This means, for example, that if you are using a
Cisco L2511 Terminal Server (and you are connecting the Netra t1 system to it using
the Cisco Asynchronous Serial Interface Breakout Cable), you can either:
■
connect the Breakout Cable directly to the Netra t1, or you can
■
connect the Breakout Cable to a patch panel and use the straight-through patch
cable (supplied by Sun) to connect the patch panel to the Netra t1 (see
FIGURE 6-5
).
Note –
You do not have to use the Netra t1 with a Cisco Terminal Server. For other
Terminal Servers, check the manufacturer’s documentation to see if the pinouts of
the serial ports on the Terminal Server match the pinouts of the Netra t1’s serial
ports. If they do not, you need to make a cable that takes each pin on one of the
Netra t1’s serial ports to the corresponding pin in the Terminal Server’s serial port.
FIGURE 6-5
Patch Panel Connection Between a Cisco L2511 and a Netra t1 System
Cisco L2511
Asynchronous
Breakout
Cable
Patch panel
Netra t1 Server
SysAdmin.book Page 53 Friday, March 30, 2001 2:38 PM