NFX250 Cable Specifications and Pinouts

Table 1 lists the specifications for the cables that connect the NFX250 devices to a management device.

Table 1: Cable Specifications for Console and Management Connections for the NFX250 Devices

Port on NFX250 Device	Cable Specification	Maximum Length	Device Receptacle
Console port	RS-232 (EIA-232) serial cable	7 feet (2.13 meters)	RJ-45
Management port	Category 5 cable or equivalent suitable for 1000BASE-T operation	328 feet (100 meters)	RJ-45

Note:

We no longer include a DB-9 to RJ-45 cable or a DB-9 to RJ-45 adapter with a CAT5E copper cable as part of the device package. If you require a console cable, you can order it separately with the part number JNP-CBL-RJ45-DB9 (DB-9 to RJ-45 adapter with a CAT5E copper cable).

NFX250 Device has two: 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 2 provides the pinout information of the Mini-USB Type-B console port.

Table 2: Mini-USB Type-B Console Port Pinout Information for NFX250 Devices

Pin	Signal	Description
1	VCC	+5 VDC
2	D-	Data -
3	D+	Data +
X	N/C	May be N/C, GND or used as an attached device presence indicator
4	GND	Ground

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 3 provides the pinout information for the RJ-45 console connector.

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 NFX250 device, use a combination of the RJ-45 cable and RJ-45 to DB-9 adapter and a USB to DB-9 plug adapter. You must provide the USB to DB-9 plug adapter.

Table 3: Console Port Connector Pinouts for the NFX250 Device

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

The following Juniper Networks USB flash drives have been tested and are officially supported for the USB port in the NFX250 devices:

• 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 NFX250 device 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 a NFX250 device. Failure to do so could expose your device to unpredictable behavior.

Note:

Executing the request system snapshot CLI command on a NFX250 device 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 NFX250 device must support USB 2.0 or later.

The 1000BASE-T RJ-45 management port on an NFX250 device uses an RJ-45 connector to connect to a management device for out-of-band management.

Table 4 provides the pinout information of the RJ-45 management port connector.

Table 4: RJ-45 Management Port Connector Pinouts for the NFX250 Devices

Pin	Signal	Description
1	TRP1+	Transmit/receive data pair 1
2	TRP1–	Transmit/receive data pair 1
3	TRP2+	Transmit/receive data pair 2
4	TRP3+	Transmit/receive data pair 3
5	TRP3–	Transmit/receive data pair 3
6	TRP2–	Transmit/receive data pair 2
7	TRP4+	Transmit/receive data pair 4
8	TRP4–	Transmit/receive data pair 4

A network port on an NFX250 device 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 NFX250 Devices.

Table 5 provides the pinout information for the RJ-45 connector.

Table 5: Network Port Connector Pinout Information for NFX250 Devices

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

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 NFX250 device, use a combination of the RJ-45 to DB-9 socket adapteralong with a USB to DB-9 plug adapter.

Note:

We no longer include a DB-9 to RJ-45 cable or a DB-9 to RJ-45 adapter with a CAT5E copper cable as part of the device package. If you require a console cable, you can order it separately with the part number JNP-CBL-RJ45-DB9 (DB-9 to RJ-45 adapter with a CAT5E copper cable).

Table 6 provides the pinout information for the RJ-45 to DB-9 serial port adapter.

Table 6: 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