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MX150 Management and Console Port Specifications and Pinouts

Mini-USB Type-B Console Port Specifications for an MX150

The MX150 has two console ports: an RJ-45 port, and a Mini-USB port.

By default, the RJ-45 port is set as the active console port. It can display all the early boot and low-level message output and you can access the device through this port in the debugger prompt.

The Mini-USB port is the passive console port. You can change the status of the port to active or passive using the port-type configuration statement. See Configuring the Console Port Type (CLI Procedure).

The Mini-USB console port uses a Mini-B plug (5-pin) connector to connect to a console management device. The default baud rate for the console port is 9600 baud.

Table 1 provides the pinout information of the Mini-USB Type-B console port.

Table 1: Mini-USB Type-B Console Port Pinout Information for MX150

Pin

Signal

Description

1

VCC

+5 VDC

2

D-

Data -

3

D+

Data +

X

N/C

N/C, GND, or used as an attached device presence indicator

4

GND

Ground

Console Port Connector Pinouts for MX150

The console port (labeled CON) is an RS-232 serial interface that uses an RJ-45 connector to connect to a console management device. The default baud rate for the console port is 9600 baud.

Table 2 provides the pinout information for the RJ-45 console connector. An RJ-45 cable and RJ-45 to DB-9 adapter are supplied with the MX150 device.

Note:

If your laptop or PC does not have a DB-9 plug connector pin and you want to connect your laptop or PC directly to an MX150 device, use a combination of the RJ-45 cable and RJ-45 to DB-9 adapter supplied with the device and a USB to DB-9 plug adapter. You must provide the USB to DB-9 plug adapter.

Table 2: Console Port Connector Pinouts for the MX150

Pin

Signal

Description

1

RTS Output

Request to send

2

DTR Output

Data terminal ready

3

TxD Output

Transmit data

4

Signal Ground

Signal ground

5

Signal Ground

Signal ground

6

RxD Input

Receive data

7

DCD Input

Data carrier detect

8

CTS Input

Clear to send

USB Port Specifications for an MX150

The following Juniper Networks USB flash drives have been tested and are officially supported for the USB port in the MX150:

  • RE-USB-1G-S—1-gigabyte (GB) USB flash drive

  • RE-USB-2G-S—2-GB USB flash drive

  • RE-USB-4G-S—4-GB USB flash drive

CAUTION:

Any USB memory product not listed as supported for the MX150 has not been tested by Juniper Networks. The use of any unsupported USB memory product could expose your device to unpredictable behavior. Juniper Networks Technical Assistance Center (JTAC) can provide only limited support for issues related to unsupported hardware. We strongly recommend that you use only supported USB flash drives.

CAUTION:

Remove the USB flash drive before upgrading Junos OS or rebooting the MX150. Failure to do so could expose your device to unpredictable behavior.

Note:

Executing the request system snapshot CLI command on the MX150 requires an external USB flash drive with at least 4 GB of free space. We recommend using the RE-USB-4G-S flash drive.

Note:

USB flash drives used with the MX150 must support USB 2.0 or later.

Network Port Connector Pinout Information for an MX150

A network port on an MX150 uses an RJ-45 connector to connect to a device.

The port uses an autosensing RJ-45 connector to support a 10/100/1000Base-T connection. Two LEDs on the port indicate link activity on the port and the port status. See Network Port and Uplink Port LEDs on MX150.

Table 3 provides the pinout information for the RJ-45 connector. An RJ-45 cable, with a connector attached, is supplied with the switch.

Table 3: Network Port Connector Pinout Information for the MX150

Pin

Signal

Description

1

TRP1+

Transmit/receive data pair 1

Negative Vport (in PoE models)

2

TRP1-

Transmit/receive data pair 1

Negative Vport (in PoE models)

3

TRP2+

Transmit/receive data pair 2

Positive Vport (in PoE models)

4

TRP3+

Transmit/receive data pair 3

5

TRP3-

Transmit/receive data pair 3

6

TRP2-

Transmit/receive data pair 2

Positive Vport (in PoE models)

7

TRP4+

Transmit/receive data pair 4

8

TRP4-

Transmit/receive data pair 4

RJ-45 to DB-9 Serial Port Adapter Pinout Information for an MX150

The console port is an RS-232 serial interface that uses an RJ-45 connector to connect to a management device such as a PC or a laptop. If your laptop or PC does not have a DB-9 plug connector pin and you want to connect your laptop or PC to an MX150, use a combination of the RJ-45 to DB-9 socket adapter supplied with the switch along with a USB to DB-9 plug adapter.

Table 4 provides the pinout information for the RJ-45 to DB-9 serial port adapter.

Table 4: RJ-45 to DB-9 Serial Port Adapter Pinout Information

RJ-45 Pin

Signal

DB-9 Pin

Signal

1

RTS

8

CTS

2

DTR

6

DSR

3

TXD

2

RXD

4

GND

5

GND

6

RXD

3

TXD

7

DSR

4

DTR

8

CTS

7

RTS