Chapter 6
Connecting the Cables
55
Using a DB25 Adapter for Your Serial Link
The pinouts are identical for both of the RJ45 serial ports on the Netra t1 system. To
connect to a UNIX
tip
session or a vt100 terminal, you need to use either the DB25
(25-Pin DSUB Male to 8-POS RJ45 Female) adapter that is supplied by Sun (part no.
530-2889) with your system, or an alternative adapter that performs the same pin
cross-overs. The Sun-supplied DB25 adapter enables you to connect to any Sun
system. The cross-overs it performs are listed in
Note –
If you need to set up a modem connection to the Netra t1 system, you must
use the port labeled Serial B. The Serial A/LOM port does not assert the required
constant DTR signal.
Note –
When viewed from the rear of the Netra t1 system, pin 1 of the RJ45 serial
port is on the left, pin 8 on the right.
FIGURE 6-7
Pins 1 to 8 on the Serial Ports
TABLE 6-2
Pin Cross-overs in the Sun DB25 (25-pin) Adapter
Serial Port (RJ45 Connector) Pin
25-pin Connecter
Pin 1 (RTS)
Pin 5 (CTS)
Pin 2 (DTR)
Pin 6 (DSR)
Pin 3 (TXD)
Pin 3 (RXD)
Pin 4 (Signal Ground)
Pin 7 (Signal Ground)
Pin 5 (Signal Ground)
Pin 7 (Signal Ground)
Pin 6 (RXD)
Pin 2 (TXD)
Pin 7 (DSR)
Pin 20 (DTR)
Pin 8 (CTS)
Pin 4 (RTS)
8
1
SysAdmin.book Page 55 Friday, March 30, 2001 2:38 PM
Содержание Netra t1 100
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