Sierra Wireless RJ-11 Manual descargar pdf (Pagina 10)

Connecting Devices to the IPG

DB-25

Number

RS-232

Name

Direction

Signal Function

2 TX I Serial data in, from remote device to IPG

3 RX O Serial data out, from IPG to remote device

4 RTS I Flow control, to enable IPG to send data

5 CTS O Flow control, to enable remote device to send data

6 DSR O Signals remote device that the IPG is attached and

powered on

7 GND Signal ground

8 DCD O Signals remote device that IPG has a valid

connection

20 DTR I Signals IPG that the remote device is attached and

powered on

22 RI O Ring Indicator

Table 2-1: EIA-232 DB-25 DCE Pinouts

Figure 2-2 shows a cable to connect most devices to the IPG/7700.

DB-25 Pin (DCE)

Number/Signal

DB-25 Pin (DTE)

Number/Signal

2 TX

22 RI

20 DTR

8 DCD

7 GND

6 DSR

5 CTS

4 RTS

3 RX

2 TX

22 RI

20 DTR

8 DCD

7 GND

6 DSR

5 CTS

4 RTS

3 RX

Figure 2-2: DB-25 to DB-25 Full Cable

The IPG/7700 does not require the use of all 9 wires. Only the RX, TX, and GND signals are

essential. DTR/DSR and RTS/CTS are only necessary for flow control. DCD is used to

indicate a connection and RI is only required for connections that need a ring indicator.

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