ACX1000 and ACX1100 Chassis Components

The ACX1000 and ACX1100 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 ACX1000 and ACX1100 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 1 describes the functions of the alarm contacts.

Figure 1 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 1: Sample Output Alarm-Reporting Device

Figure 2 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 2: 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 ACX1000 and ACX1100 router include:

• External building-integrated timing system (BITS) timing port

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

• 1.544-MHz/2.048 MHz T1/E1 (RJ-48) ports for timing input or output

• 1 PPS SMB connectors (one input and one output)

• Time-of-Day (TOD) RS232 port

• SyncE support on RJ-45/SFP ports as timing input or output

• Packet timing (IEEE 1588v2) includes:

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

  • Timing output when configured as BC

The front panel of an ACX1000 router consists of the following components (see Figure 3):

• Chassis status LED labeled SYS

• DC power terminals

• USB port for upgrading Junos OS

• Management Ethernet port labeled MGMT

• Console or auxiliary port labeled CONSOLE/AUX

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

• External clocking input port labeled EXT REF CLK IN

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

• Network ports and corresponding status LEDs:

  • Eight T1/E1 ports labeled 0/0/0 through 0/0/7

  • Eight Gigabit Ethernet RJ-45 ports labeled 0/1/0 through 0/1/7

  • Combination Gigabit Ethernet ports labeled 0/2/0 through 0/2/3, either:

    • Four Gigabit Ethernet RJ-45 ports labeled Cu

    • Four Gigabit Ethernet ports labeled SFP that accept SFP transceivers

Figure 3: Front Panel of the ACX1000 Router

1 — DC terminals	7 — ESD point
2 — Management Ethernet port	8 — Combination Gigabit Ethernet RJ-45 and SFP ports
3 — Console or auxiliary port	9 — External clocking ports
4 — Alarm contact port	10 — System (SYS) LED
5 — T1/E1 ports	11 — USB port
6 — Gigabit Ethernet (GE) ports	12 — Grounding terminals

The front panel of an ACX1100 router consists of the following components (see Figure 4 and Figure 5):

• Chassis status LED labeled SYS

• AC power inlets or DC power terminals

• USB port for upgrading Junos OS

• Management Ethernet port labeled MGMT

• Console or auxiliary port labeled CONSOLE/AUX

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

• External clocking input port labeled EXT REF CLK IN

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

• Network ports and corresponding status LEDs:

  • Eight Gigabit Ethernet (GE) RJ-45 ports labeled 0/0/0 through 0/0/7

  • Combination ports labeled 0/1/0 through 0/1/3, either:

    • Four Gigabit Ethernet RJ-45 ports

    • Four Gigabit Ethernet SFP ports that accept SFP transceivers

Figure 4: Front Panel of the AC-Powered ACX1100 Router

1 — AC inlets	7 — Combination Gigabit Ethernet SFP ports
2 — Management Ethernet port	8 — External clocking ports
3 — Alarm contact port	9 — Console or auxiliary port
4 — Gigabit Ethernet (GE) ports	10 — USB port
5 — Combination Gigabit Ethernet RJ-45 ports	11 — System (SYS) LED
6 — ESD point

Figure 5: Front Panel of the DC-Powered ACX1100 Router

1 — DC terminals	7 — Combination Gigabit Ethernet SFP ports
2 — Management Ethernet port	8 — External clocking ports
3 — Alarm contact port	9 — Console or auxiliary port
4 — Gigabit Ethernet (GE) ports	10 — USB port
5 — Combination Gigabit Ethernet RJ-45 ports	11 — System (SYS) LED
6 — ESD point	12 — Grounding terminals

Unless otherwise specified, the information about uplink ports applies to both ACX1000 and ACX1100 routers.

• T1/E1 Ports
• Gigabit Ethernet RJ-45 Ports
• Gigabit Ethernet SFP Ports

Unless otherwise specified, the information about LEDs applies to both ACX1000 and ACX1100 routers.

• System LED on the Front Panel
• T1/E1 Port LEDs
• Ethernet Port LEDs
• SFP Port LEDs
• Management and Console Port LEDs on the Front Panel