Sun Microsystems Cobalt LX50, User Manual

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Connecting the Cables
User Guide—Sun Cobalt LX50 Server 2-31
Figure 31. J6A2 Jumper Block Configured for DCD Signal (pin 7 connected to DCD)
For those serial devices that require a DB9 type of serial connector, an 8-pin RJ-45-to-DB9 adapter must be used.
Table 9 provides the pinout required for the adapter to provide RS232 support.
On the Sun Cobalt LX50 server, the adapters used for the
back connector cannot be used with the front connector, as
the pinout for the RJ-45 ports are different.
As an example, when using an external modem to access the server management features of the server Main Board,
you must first set the J6A2 jumper to support a DCD signal and make or choose the appropriate RJ-45-to-DB9
adapter.
Figure 32. J6A2 Jumper Block Configured for DCD Signal (pin 7 connected to DCD)
Table 9. Back Serial 2 Port Adapter Pinout
RJ-45 Signal Abbr. DB9
1 Request to Send RTS 7
2 Data Terminal Ready DTR 4
3 Transmitted Data TD 3
4 Signal Ground SGND 5
5 Ring Indicator RI 9
6 Received Data RD 2
7 Data Carrier Detect/Data Set Ready DCD/DSR
1 or 6
a
a. The RJ-45-to-DB9 adapter used should match both the signal requirements
of the serial device and the external RJ-45 serial port. The external RJ-45
serial port provides all standard serial port signals, however having only 8
pins, Pin 7 can be manually configured to support either a DCD or DSR signal
by setting the J6A2 jumper block appropriately.
8 Clear To Send CTS 8
Pin
1
Pin
2
Pin
3
J6A2
J6A2 Jumper Block
(viewed from front of LX50 server)
Pin
1
Pin
2
Pin
3
J6A2
J6A2 Jumper Block
(viewed from front of LX50 server)