MX104 Management and Console Port Specifications and Pinouts

Four Subminiature B (SMB) connectors (for 10-MHz and 1-PPS), one RJ-48 port (for BITS), and one RS-232 port (for TOD) on the front panel of the router connect to external clock signal sources. The clocking ports provide the synchronized output clocks from any one of the reference clock inputs based on the clock’s priority.

The reference clock inputs can be Ethernet-recovered clocks, T1 or E1 line clocks, IEEE 1588v2-recovered clocks, BITS timing, 10-MHz timing, and 1-PPS timing. The T1 or E1 line clock also supports loop timing. These clocking ports distribute a synchronized clock signal throughout the chassis by locking onto the selected clock source. In the absence of these configured ports, the local oscillator present in the system provides the chassis synchronization.

Clock sources within the MX104 router include:

• External clock timing port

• 10-MHz timing connectors (one input and one output)

• 1-pulse-per-second (PPS) connectors (one input and one output)

• Time-of-day (TOD) RS-232 port

• Synchronous Ethernet support on SFP ports as timing input or output

• Packet (IEEE 1588-2008) v2 timing includes:

  • Timing input when configured as Ordinary Clock (OC) or Boundary Clock (BC)

  • Timing output when configured as BC

• Cable Specifications
• Pinouts

The Routing Engine contains two ports labeled AUX and CONSOLE.

The ports are asynchronous serial interfaces that accept an RJ-45 connector. The ports connect the Routing Engine to an auxiliary or console management device. Table 4 describes the RJ-45 connector pinout.

• Cable Specifications
• Pinouts

The following Juniper Networks USB Flash drives have been tested and are officially supported for the USB port on all MX Series routers:

• RE-USB-1G-S

• RE-USB-2G-S

• RE-USB-4G-S

All USB Flash drives used on MX Series routers must have the following features:

• USB 2.0 or later.

• Formatted with a FAT or MS-DOS file system.

• Cable Specifications
• Port Pinouts

The external Building-Integrated Timing Supply (BITS) clock interface port labeled EXT REF CLK IN on the front panel of the router allows you to connect external clock signal sources.

Two LEDs indicate link status on the port and function in the same way as the T1/E1 ports. The clocking information is extracted from the input, but the data is discarded.

• Cable Specifications
• Port Pinouts

Cable Specifications

Table 7 lists the specifications for the cables that connect to the EXT REF CLK IN port.

Note:

The plastic connector at the end of the RJ-48 cable is physically identical to an RJ-45 connector (see Figure 1). You must ensure that the cable pinouts match the pinouts described in Table 8.

Figure 1: RJ-48 Connector for MX104 BITS Ports

Table 7: MX104 BITS Port Cable Specifications

Specification	Value
Cable	RJ-48 shielded cable
Router receptacle	Autosensing RJ-48 connector

The router contains four ports that support 1-pulse-per-second (PPS) and 10-MHz GPS signals. These signals are internally isolated and have surge protection.

Table 9 lists the specifications for the cables that connect to the 1PPS and 10MHZ input and output ports.

A time-of-day (ToD) port on the front panel of the router allows you to connect external timing signal sources. The external timing input port is labeled TOD.

• Cable Specifications
• Port Pinouts