SRP I/O Module

The SRP I/O module provides two management ports. You can connect a console directly to the RS-232 serial port using a shielded straight-through cable with a female DB-9 connector on one end and a male DB-25 with a crossover adapter on the DB-25 end. This port is called the serial port, the RS-232 port, or the console serial port. Figure 54 shows the location of the serial port and the sequence of the pins in the RS-232 connector.

The console port is considered a data terminal equipment interface (DTE). Direct connection to a terminal or PC (which also have DTE interfaces) requires a crossover cable.

Figure 54: SRP I/O Module Serial Port

SRP I/O Module Serial Port

Table 18 lists the pinout for the serial cable's RS-232 connector.

Table 18: SRP I/O Module—RS-232 Serial Connector Pinout

Pin

Signal

1

DCD

2

RXD

3

TXD

4

DTR

5

GND

6

DSR

7

RTS

8

CTS

9

RNG

After you have configured an IP address on the system, you can connect using a host running Telnet over the 10/100Base-T Ethernet port on the SRP I/O module. The router ships with a straight-through cable having a male RJ-45 Ethernet connector on each end. Figure 55 shows the location of the Ethernet port and the sequence of the pins in the RJ-45 connector.

Figure 55: SRP I/O Module Ethernet Port

SRP I/O Module Ethernet Port

Table 19 lists the pinouts for the Ethernet cable's RJ-45 connector.

Table 19: SRP I/O Module—RJ-45 Connector Pinout

Pin

Signal

1

TX +

2

TX –

3

RX +

4

no connect

5

no connect

6

RX –

7

no connect

8

no connect

To facilitate connecting the system to a terminal, the system is shipped with one of each of the following cable adapters:

Table 20 lists the pinouts for the crossover adapter.

Table 20: DB-9—RJ-45 Crossover Adapter Pinout

DB-9 Pin

Signal

RJ-45 Pin

1

DCD

1

2

RXD

3

3

TXD

2

4

DTR

6

5

GND

5

6

DSR

4

7

RTS

8

8

CTS

7

9

RNG

no connect

Table 21 lists the pinout for the straight-through adapter.

Table 21: DB-9—RJ-45 Straight-Through Adapter Pinout

DB-9 Pin

RS-232 Signal Name

RJ-45 Pin

Ethernet Signal Name

1

DCD

1

TX +

2

RXD

2

TX –

3

TXD

3

RX +

4

DTR

4

no connect

5

GND (signal)

5

no connect

6

DSR

6

RX –

7

RTS

7

no connect

8

CTS

8

no connect

9

RNG

no connect

none