1. In Superuser mode, type show sessions to see all the current calls.

   ACMEPACKET# show sessions

2. Type set-system-state offline and press <Enter>.

   ACMEPACKET# set-system-state offline
    Setting system state to going-offline, process will complete when all current calls have completed
    ACMEPACKET#

1. In Superuser mode, type halt and then press <Enter>.
2. To confirm the halt request, type Y and then press <Enter>.
3. When the console indicates shutdown is completed, unplug the AC power cords from the power supplies on the rear panel of the Acme Packet 4600.
4. Confirm that the graphic display is dark and all fans are off.

1. Save any configuration changes you have made in the ACLI while in Superuser mode by typing save-config <Enter>.

   ACMEPACKET# save-config
    Save-Config received, processing.
    waiting 1200 for request to finish
    Request to 'SAVE-CONFIG' has Finished,
    Save complete
    Currently active and saved configurations do not
    match!
    To sync & activate, run 'activate-config' or 'reboot
    activate'.
    ACMEPACKET#

2. Execute the reboot command at the Superuser prompt by typing reboot and then pressing <Enter>.

   ACMEPACKET# reboot
          
   -----------------------------------------
   WARNING: you are about to reboot this SD!

3. Type Y and then press <Enter> at the confirmation prompt to proceed with the reboot.

   Reboot this SD [y/n]?: y

1. Insert a rigid paperclip-sized tool into the small hole on the front of the chassis beneath the graphic display. The system immediately resets and begins its initialization and boot sequence.

Power Cycling the Acme Packet 4600 is the process of turning the chassis off and then on again. Unplugging the power cords from the power supplies means to remove power from the system. When power cycling, it is imperative that you wait at least 10 seconds between power down and power up to ensure that all components are completely powered down before restarting the system.

1. Prepare all equipment connected to the NIU for the NIU’s removal from the network.
2. Force the system into standby state.
3. Remove the NIU as described in this document.
4. Log in to the ACLI via a console connection.
5. Reboot the system from the ACLI.

1. Locate the power supply to be installed.
2. Locate the empty power supply slot in the chassis.
3. Insert the power supply into the empty power supply slot located on the rear panel of the Acme Packet 4600 chassis. The labels on the power supply face upward.
4. Push the power supply handle until the power supply is engaged with the mid plane.
5. The power supply is installed in the Acme Packet 4600 chassis.
6. Connect the power cord to the inserted power supply.

1. If the target Acme Packet 4600 is part of a HA pair, ensure that it is in standby state. For more information, see See Standby State for HA Nodes.
2. Set the System Power Switch to STBY to power down the chassis. See See DC Power Supplies (left) and System Power Switch (right).
3. Unplug all network and management cables from the NIU you plan to remove from the Acme Packet 4600.

   Note:

   This will cause a link loss on all connections.
4. Using a #2 Phillips screwdriver or your hands, unscrew the two captive thumbscrews located on each side of the NIU. The screws are spring-loaded and will push forward, but they will not fall out of the NIU.
5. With thumb and index finger slide ejector levers inward prior to pivoting ejectors.

   Note:

   Failure to follow this step may cause damage to the NIU ejectors:
6. Slide the lever catch and pivot the two ejection levers outward at the same time, pulling the card out of its connection to the motherboardand away from the system chassis. This action disengages the NIU from the system, severing all electrical contact to the processing unit.
7. Remove the loosened NIU out of the Acme Packet 4600 by holding and pulling on each side of the NIU's front panel.
8. Place the NIU in an antistatic bag while it remains outside of the Acme Packet 4600 System chassis.

1. Locate the NIU.
2. Ensure that the ejection levers on the front of the card are in the open and extended position.
3. Hold the NIU by its sides with the front panel bezel facing you.
4. Note the two flared guide rails that the NIU rides as it is inserted into the Acme Packet 4600. The guide rails lead the NIU to engage with the bus connector squarely.
5. Slide the card into the Acme Packet 4600. The physical interface card circuit board slides into the guide rails in the NIU bay of the system chassis.
6. Continue sliding the card into the chassis until the ejection levers meet the chassis and start to fold inward as the NIU is inserted into the chassis.
7. Fold both ejection levers inward toward the card to complete the NIU connection to the motherboard. Pushing the ejection levers inward draws the physical interface card toward the system chassis and completes the connection.
   Ensure pressure is applied to the ends of the ejector (not the sliding section) when seating the NIU/TCU.
8. Verify the lever catch is fully engaged with the bezel.
9. Screw the NIU into the chassis with a #2 Phillips screwdriver. This creates the final connection between the interface unit and the chassis.
10. Replace all network and management cabling.
11. Set the System Power switch to ON to power up the chassis. The system boots up.
12. If the H/S LED lights in either a steady or flashing state, the NIU is not seated properly. If the H/S LED is lit, follow these steps:
    1. Set the System Power switch to STBY to power down the chassis.
    2. Push the ejection levers inward to draw the physical interface card toward the system chassis and complete the connection. The latches must engage to complete NIU insertion and lock to the chassis.
    3. Set the System Power switch to ON to apply power to the chassis. The system boots up.
    4. When the NIU PWR LED lights and the H/S LED is extinguished, proceed with normal operations. Otherwise, contact customer support for further assistance.

1. Remove the NIU card as directed in this guide.
2. Place the NIU card on an ESD-safe mat or other similar location.
3. Using the Phillips screwdriver, remove the four standoff screws from the SSM3 module and store them for later reuse.
4. To remove the module (shown below), grasp the SSM3 module along either side of the connector between your thumb and index finger and pull up on one side of the connector until the module is fully disconnected from the connector. Place the module on an ESD-safe surface.

1. Grasp the SSM3 module along either side of the connector between your thumb and index finger and join the module connector to the NIU connector by pressing evenly across the connector until the module is fully seated (see below).
2. Press evenly across the top of the connector to fully seat the SSM3 module on the NIU PCB as shown below. Note that the SSM3 is fastened to the connector at one end while at the other end, the board rests on two standoffs attached to the NIU as shown in the figures below.
3. Using the Phillips screwdriver, insert and tighten the four standoff screws to secure the SSM3 module to the PCB.
4. Replace the NIU in the Acme Packet 4600 chassis.

1. Remove the NIU card as directed in this guide. See See NIU Removal and Replacement.
2. Place the NIU card in an ESD-safe location.
3. To remove the module (as shown in the photos below), use a fingertip to release the catch holding either end of the transcoder DSP module.
4. Once the fasteners are detached from both sides of the transcoder DSP module, hold the center of the module between your finger and thumb and slowly remove the module. Be careful to keep the module level while removing it and guide it smoothly through the guide slots on either side.
5. Place the transcoder DSP module on an ESD-safe antistatic surface.

1. Grasp the transcoder DSP module between your thumb and index finger and line up both sides of the module with the slot guides attached to the NIU PCB (see below).
2. Using your thumb on your other hand, guide the module evenly into the slot guides located on each side as you lower the component into the connector. Press evenly across the top of the connector to fully seat the transcoder DSP module on the NIU PCB as shown below. Note that the module is fastened to the connector at one end while at the other end, the board rests on two standoffs attached to the NIU as shown in the figures below.

The rack ears must be removed before you can open the chassis.

To remove center-mount equipment rack hardware:

1. Remove the left rack ear by using a #1 Phillips-head screwdriver.
2. Remove the right rack ear by unscrewing the three screws.
3. Set the rack ears and screws aside.

1. Remove the left chassis slide by using a #2 Phillips-head screwdriver.
2. Remove the left rack ear by unscrewing the three screws.
3. Remove the the two countersunk screws on the left rear side by using a #1 Phillips-head screwdriver.
4. Repeat steps 1 - 3 on the right side of the Acme Packet 4600.
5. Set the rack ears and screws aside

1. Unscrew the four countersunk screws on each side of the Acme Packet 4600 that hold the chassis cover to the chassis.
2. Set these screws aside.
3. Unscrew the seven countersunk screws on the top of the Acme Packet 4600 that hold the chassis cover to the chassis. The following is an image of the top of the chassis.
4. Set the lid and screws aside.
5. Lift the chassis lid off of the chassis and set aside.

After the Solid State Drive has been installed in the Acme Packet 4600, you can close the chassis and reinstall it in the equipment rack.

1. Press two fingers against the left end of the plastic fan bezel and pull it directly toward you. The fan bezel comes off the chassis. Set the fan bezel aside. The individual fans are now exposed.
2. Using a small bladed screwdriver, unscrew the two captive screws at each upper left and lower right corners of the individual fan you are replacing.
3. Pull the individual fan you just unscrewed directly toward you, out of the chassis. Move the fan to an ESD-safe location.

1. Carefully align the pins on the back of the fan with the holes in the chassis midplane and install the fan into the slot.
2. Using a small bladed screwdriver, tighten the two captive screws to hold the fan into place.
3. Install the front bezel onto the Acme Packet 4600 by hooking the right side of the bezel onto the chassis and then pivoting the bezel to the left until the magnet catches the chassis. You may need to push on the left side of the display opening to fully seat the bezel.
4. The replacement fan and Bezel are installed onto the Acme Packet 4600.

Cooling maintenance encompasses cleaning the fan module and cleaning the air inlets on the front of the Acme Packet 4600 chassis. Cleaning the fan module requires that you remove the module itself. If you are not shutting down the Acme Packet 4600, this procedure must be performed quickly or else the system may overheat and cause packet processing to stop.

This maintenance should be performed alongside other preventive maintenance to take place within a planned maintenance or downtime window, during off-peak hours.

1. Unplug all fiber optic cables from the optical transceiver to be replaced.
2. Pull the bale clasp latch out and down. It will pivot downwards on its hinge.
3. Holding the extended bale clasp latch, pull the optical transceiver fully out of its socket of the physical interface card.

1. Slide the replacement optical transceiver into the socket on the NIU.
2. Press on the face of the optical transceiver to seat it in the socket.
3. Flip the bale clasp latch back into the rest position.
4. Reconnect the optical cables to their corresponding ports.

Copper transceivers are also available for the Acme Packet 4600 System. They are removed and replaced similarly to the optical transceivers.

This section provides details about hardware and environmental alarms.

Link alarms are generated when a network cable is plugged into or unplugged from a configured network interface. For each possible network interface, an alarm exists that indicates whether the link goes up or down.

The following tables list detailed information about the Acme Packet 4600 NIU link alarms, including their ID assignments, severities, causes, log messages, and messages printed in the graphic display window.