LWC Cable Specifications and Pinouts

Cable Specifications for Console Connection for an LWC Device

Juniper Networks resident engineers can use the console (CON) port to connect an LWC device to a management device. Table 1 lists the specifications for the cables that connect the LWC devices to a management device.

Table 1: Cable Specifications for Console Connections for an LWC Device
Port on the LWC	Cable Specification	Cable Supplied	Maximum Length	Device Receptacle
Console port	RS-232 (EIA-232) serial cable	One 7-foot (2.13-meter) long RJ-45 patch cable and RJ-45 to DB-9 adapter	2.13 meters	RJ-45

Console Port Connector Pinouts for LWC Devices

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. We supply an RJ-45 cable and RJ-45 to DB-9 adapter with the LWC 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 LWC 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 LWC 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

USB Port Specifications for an LWC Device

We've tested the following Juniper Networks USB flash drives; the USB port in the LWC device supports these flash drives:

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 LWC 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.

Note:

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

Network Port Connector Pinout Information for an LWC Device

A network port on an LWC 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.

Table 3 provides the pinout information for the RJ-45 connector. We supply an RJ-45 cable, with a connector attached, with the LWC device.

Table 3: Network Port Connector Pinout Information for an LWC Device
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

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

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 LWC device, 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