ACX4000 Chassis

The front panel of an ACX4000 router consists of the following components:

• Chassis status LED labeled SYS

• Two USB ports for upgrading Junos OS

• Management Ethernet port labeled MGMT

• Console or auxiliary port labeled CONSOLE/AUX

• Alarm console port labeled ALARM—accepts a DE-15 alarm cable.

• Alarm console port labeled ALARM—accepts a DE-15 alarm cable.

• External Building Integrated Timing System (BITS) timing port labeled EXT REF CLK IN

• External clocking ports supporting 1-PPS and 10-MHz input and output

• Network ports and corresponding status LEDs:

  • Combination Gigabit Ethernet ports labeled 0/0/0 through 0/0/7, either:

    • Eight SFP ports

    • Six RJ-45 ports

    • Two 65W PoE Gigabit Ethernet RJ-45 ports, labeled POE, that provide electrical current to devices-such as IP phones, wireless access points, and security cameras–through network cables. These ports comply with IEEE 802.3af (PoE) and IEEE 802.3at (PoE+).

  • Two Gigabit Ethernet (GE) ports, labeled 0/1/0 and 0/1/1, that accept SFP transceivers

  • Two 10-Gigabit Ethernet (XE) ports, labeled 0/2/0 and 0/2/1, that accept SFP+ transceivers

Figure 1: Front Panel of the ACX4000 Router

1 — ESD point	9 — Alarm contact ports
2 — MIC slots	10 — Alarm input ports
3 — Combination ports: Gigabit Ethernet RJ-45 ports or Gigabit Ethernet SFP ports	11 — External reference clocking port
4 — Power over Ethernet (PoE) ports	12 — Console or auxiliary port
5 — Fan module	13 — Management port
6 — Grounding terminals	14 — System status LED
7 — Ten-Gigabit Ethernet SFP+ ports	15 — USB ports
8 — Gigabit Ethernet SFP ports	16 — Power supplies

The following ports are supported on ACX4000 routers:

• T1/E1 Ports
• RJ-45 Ports
• PoE Ports
• Gigabit Ethernet Ports
• 10-Gigabit Ethernet Ports

The ACX4000 router has four external alarm contacts (also known as potential free contacts) for connecting the router to external alarm devices. The port labeled ALARM uses a 15-pin D-type connector. The external alarm contact has 15 pins that accept a single core wire from external alarm devices. A DE15 alarm cable is required to connect the ACX4000 router to external alarm devices. Use the gauge wire appropriate for the external device that you are connecting.

Whenever a system condition triggers an alarm, the alarm relay contacts are activated, which in turn activates the external alarm devices. The alarm setting is open or closed.

You can connect and configure two output alarms and four input alarms. Two additional output alarms are reserved and are used to indicate major and minor system alarms. Each output and input alarm has two contacts for connecting the router to external alarm devices. Contact 1 of each alarm can be configured as Normally Open [NO] or Normally Closed [NC] through the CLI. Contact 2 of each alarm functions as a reference [REF] or negative potential terminal for Contact 1 of the corresponding alarm and provides a current path for external alarm devices. Table 6 describes the functions of the alarm contacts.

Figure 2 shows an example of a wiring diagram for a simple output alarm-reporting device. In this case the device is a light bulb that illuminates when the device encounters a condition that activates the red alarm LED and relay contacts. The alarm relay contacts can also be used to activate other devices such as bells or buzzers.

Figure 2: Sample Output Alarm-Reporting Device

Figure 3 shows an example of a wiring diagram for a simple input alarm-reporting device. In this case the push button switch is an alarm sensor that triggers an input alarm when a door-open condition occurs.

Figure 3: Sample Input Alarm-Reporting Device

The clocking ports acquire the clock source and synchronize communication over time-division multiplexing (TDM) interfaces in the router. The clocking ports distribute a synchronized clock signal throughout the router by locking onto a clock signal originating from an internal clock source or by connecting to an external clock source.

The reference clock inputs can be T1/E1 line clocks, Ethernet recovered clocks, IEEE 1588v2 recovered clocks, or xDSL NTU-R timing. Externally available reference clocks are BITS T1/E1 rate clocks, 1 pulse per second (PPS), and 10 MHz. The four SubMiniature B (SMB) connectors 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 above reference inputs based on the clock’s priority.

Internal clock sources within the ACX4000 router include:

• Four alarm inputs and four alarm output contacts

• One management port

• External Building Integrated Timing System (BITS) 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) RS232 port

• 1.544 MHz/2.048 MHz T1/E1 (RJ48) ports for timing input or output

• SyncE support on RJ45/SFP ports as timing input or output

• Packet (IEEE 1588-2008) 2 timing includes:

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

  • Timing output when configured as BC

Modular Interface Cards (MICs) install into two slots in the front of the ACX4000 router and provide the physical connections to various network media types. The slots are labeled 1/0 and 1/1. You can install MICs of different media types on the same router as long as the router supports those MICs. For complete specifications, see the ACX4000 Universal Metro Router Interface Module Reference.

MICs receive incoming packets from the network and transmit outgoing packets to the network. During this process, each MIC performs framing and high-speed signaling for its media type. Before transmitting outgoing data packets through the MIC interfaces, the PFE encapsulates the packets received.

MICs are hot-removable and hot-insertable.

• System LED on the Front Panel
• AC Power Supply LED
• DC Power Supply LED
• T1/E1 Port LEDs
• Ethernet Port LEDs
• PoE Port LEDs
• SFP and SFP+ Port LEDs
• Management and Console Port LEDs on the Front Panel
• MIC LEDs