Cisco AS5400 Universal Gateway Chassis Installation Guide
Replacing Memory Chips
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Replacing Memory Components

Table Of Contents

Replacing Memory Components

Removing the Chassis Cover

Required Tools

Safety Recommendations

Chassis Cover Removal

Replacing the Boot ROM

Required Tools and Equipment

Boot ROM Replacement

Replacing SDRAM DIMMs

Required Tools and Equipment

SDRAM DIMM Replacement

Replacing Flash Memory SIMMs

Flash Memory Identification

Cisco AS5400HPX

Cisco AS5400

Required Tools and Equipment

Flash Memory SIMM Replacement

Replacing the Chassis Cover

Required Tools and Equipment

Chassis Cover Replacement


Replacing Memory Components


This appendix contains procedures on how to replace memory chips in the Cisco AS5400 and Cisco AS5400HPX. The appendix contains the following sections:

Removing the Chassis Cover

Replacing the Boot ROM

Replacing SDRAM DIMMs

Replacing Flash Memory SIMMs

Replacing the Chassis Cover


Note Unless specifically noted, all references to the Cisco AS5400 also apply to the Cisco AS5400HPX.


Removing the Chassis Cover

This section describes how to open the chassis by removing the chassis cover.

Required Tools

You need the following tools:

Medium Phillips screwdriver

Small or medium flat-blade screwdriver

Safety Recommendations

Note the following safety recommendations:


Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.



Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.



Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.


NVRAM in the universal gateway uses an internal lithium battery to maintain data. Although this is not a field-serviceable component, we are required to provide the following safety warning:


Warning There is the danger of explosion if the battery is replaced incorrectly. Replace the battery only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.



Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.


Chassis Cover Removal

You must open the chassis to gain access to its interior components: boot read-only memory (ROM) software, synchronous dynamic random-access memory dual in-line memory modules (SDRAM DIMMs), and Flash memory SIMMs. (When you replace the boot ROMs, you must also remove all feature cards in the chassis.)

Take these steps:


Step 1 Turn the power switch OFF and disconnect site power. (Note that the power switch is part of the power supply.)

Step 2 If using a DC-powered unit, refer to Figure A-1 and complete Step a through Step d.


Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.


Figure A-1 DC Power Supply Connections

a. Loosen the six locking screws for the negative, return, and ground connections on the DC power supply terminal blocks.

b. Remove the -48 VDC wires from the terminal block negative connectors (-).

c. Remove the 48 VDC wires from the terminal block positive connectors (+).

d. Remove the safety ground (green wires) from the terminal block ground connectors.

Step 3 Remove all interface cables from the rear panel of the chassis.

Step 4 Place the chassis so that the front panel is facing you.

Step 5 Remove the four screws on the chassis cover. (See Figure A-2.)


Caution Do not connect a 48 VDC wire to chassis. A single-point ground is recommended at the power distribution rack.

Figure A-2 Removing the Chassis Cover Screws

Step 6 Gently pry the cover off with a flat-blade screwdriver. Lift the chassis cover upward, and pull it away from the tabs on the rear of the chassis. (See Figure A-3.)

Figure A-3 Removing the Chassis Cover


Replacing the Boot ROM

To upgrade the boot ROM software to a new software image, you must replace the existing boot ROM.

Required Tools and Equipment

You will need the following tools and equipment:

ROM extraction tool

One boot ROM

ESD-preventive wrist strap

Tape

Boot ROM Replacement

To replace the boot ROM, follow these steps:


Step 1 Turn the power switch OFF and disconnect site power.

For DC-powered units, note the following warning:


Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.



Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.


Step 2 Remove all interface cables from the DFCs.

Step 3 Attach an ESD-preventive wrist strap.

Step 4 Remove the chassis cover. (See the instructions in the "Removing the Chassis Cover" section on page A-1.)

Step 5 Remove all cards to access the system board. (Refer to the Cisco AS5350 and Cisco AS5400 Universal Gateway Card Installation Guide for instructions on removing various dial feature cards.)

Step 6 Locate the boot ROM on the system board. (See Figure A-4.)

Figure A-4 Memory Locations

Step 7 Gently extract the old ROM with a ROM extraction tool and set the old boot ROM on a nonconductive surface. Do not use excessive force because the socket might break.

Step 8 Insert the new boot ROM into the socket. Be careful not to bend or crush any of the bottom pins. If necessary, use needlenose pliers to straighten out any bent pins.


Caution The notch in the ROM must align with the notch in the socket on the system board. If the ROM is installed backward, damage will occur when the universal gateway is powered ON.

Step 9 Replace any cards removed. (Refer to Cisco AS5350 and Cisco  AS5400 Universal Gateway Card Installation Guide for instructions on installing specific dial feature cards.)

Step 10 Replace the chassis cover. (See the instructions in the "Replacing the Chassis Cover" section.)

Step 11 Power ON the universal gateway. If error messages relating to memory are displayed, remove the new boot ROMs and reinstall them, taking care to seat the ROMs firmly in their sockets.


Replacing SDRAM DIMMs

This section describes how to replace SDRAM DIMMs on the system board. You might need to upgrade the SDRAM DIMMs for the following reasons:

You have upgraded to a new Cisco IOS feature set or release that requires more memory.

You are using very large routing tables or many protocols (for example, when the universal gateway is set up as a connection device between large external networks and your internal network).

The system board contains three sockets for SDRAM DIMMs (see Figure A-4):

Two sockets hold main memory SDRAM DIMMs with each DIMM at 256 MB. Main memory is used by the CPU to store the operating configuration, routing tables, and queues. The Cisco AS5400 is shipped with one DIMM installed in its socket; the second socket is empty. To increase the memory capacity to 512 MB, install an additional 256 MB DIMM in the empty socket.

One socket holds a packet memory SDRAM DIMM. Packet memory is used to store incoming and outgoing packets. The maximum packet memory supported is 128 MB.

Required Tools and Equipment

You need the following tools and equipment:

ESD-preventive wrist strap

The appropriate SDRAM DIMM(s)

SDRAM DIMM Replacement

To replace the SDRAM, follow these steps:


Step 1 Turn the power switch OFF and disconnect site power.

For DC-powered units only, note the following warning.


Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.


Step 2 Remove all interface cables from the DFC cards.


Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.


Step 3 Attach an ESD-preventive wrist strap.

Step 4 Remove the chassis cover. (See the instructions in the section "Replacing the Chassis Cover" earlier in this appendix.)

Step 5 Remove all cards to access the system board. (Refer to the Cisco AS5350 and Cisco AS5400 Universal Gateway Card Installation Guide for instructions on removing specific cards.)

Step 6 Use Figure A-4 to locate the DIMM you are replacing.

Step 7 Pull the socket latches away from the DIMM, and pull the DIMM out of the socket. (See Figure A-5.) The latches hold the DIMM tightly, so be careful not to break the socket.


Caution To prevent damage, do not press on the center of the DIMM. Handle the DIMM carefully.

Figure A-5 Removing the SDRAM DIMM

Step 8 Position the new DIMM so that the polarization notch is located at the right end of the DIMM socket.

Step 9 Insert the new SDRAM DIMM by sliding the end with the metal fingers into the DIMM socket. (See Figure A-6.)

Figure A-6 Inserting the New SDRAM DIMM into the Socket

Step 10 Snap the latches into place. Do not use excessive force because the socket might break.

Step 11 Replace the chassis cover. (See the "Replacing the Chassis Cover" section on page A-13.)

Step 12 Replace the feature cards. (Refer to the Cisco AS5350 and Cisco AS5400 Universal Gateway Card Installation Guide for instructions on replacing specific dial feature cards.)

Step 13 Power ON the universal gateway. If error messages relating to memory are displayed, remove the SDRAM DIMM and reinstall it, taking care to seat the DIMM firmly in its socket.


Replacing Flash Memory SIMMs

The system card contains three sockets for flash memory SIMMs (see Figure A-4):

Two sockets hold SIMMs containing the Cisco IOS software image. Each SIMM is 32 MB.

Cisco recommends that you first install SIMM0. To increase the memory capacity to 64 MB, install the second SIMM in SIMM1.


Caution It is critical that the correct Flash memory SIMM modules be installed in the Cisco AS5400 and Cisco AS5400HPX universal gateways. The Cisco AS5400 only supports 5V Flash memory SIMM modules and the Cisco AS5400HPX only supports 3.3V Flash memory. In addition, system flash and boot flash modules for the Cisco AS5400 are not interchangeable with those for the Cisco AS5400HPX. Using the incorrect memory will cause the system to malfunction and may cause damage to the system board or memory card.


Tips To help identify your universal gateway, starting with Cisco IOS Release 12.2(11)T, the show version and show diag commands will identify the universal gateway as an AS5400 or AS5400HPX. Prior to this release, these commands showed the universal gateway as an AS5400, even if it was a AS5400HPX.



Note Flash memory should be reformatted after adding, replacing, or removing flash memory SIMMS.


One socket holds a SIMM for the boot helper image (rxboot) software. This SIMM, labeled SIMM, must also be installed. The SIMM can be 8, or 16 MB.

The Flash memory SIMMs must be purchased from Cisco. For ordering information, refer to the "Obtaining Technical Assistance" in the Preface.

Flash Memory Identification

Cisco AS5400HPX

To identify the correct Flash memory SIMMs for the Cisco AS5400HPX, look for a label on the front of the 3.3V memory card with the part number "80-65xx-xx." (See Figure A-7). Table A-1 shows the possible part numbers for the 3.3V Flash memory SIMMs.

Figure A-7 Flash SIMM Module for the Cisco AS5400HPX

Table A-1 3.3V SIMM Module Part Numbers

Memory Size
Cisco AS5400HPX Part No.

8 MB

80-6520-xx

16 MB

80-6521-xx


Cisco AS5400

To identify the correct Flash memory SIMMs for the Cisco AS5400, look for a model number on the flash chip that ends in "J5". The "J5" identifies the chip as 5V. (See Figure A-8).

Figure A-8 Flash SIMM Module for the Cisco AS5400

Required Tools and Equipment

To replace the Flash memory, you need the following tools and equipment:

ESD-preventive wrist strap

The appropriate Flash memory SIMM(s)

Flash Memory SIMM Replacement

To replace flash memory, follow these steps:


Step 1 Backup the current Flash memory. Refer to the Cisco AS5350 and Cisco AS5400 Universal Gateway Software Configuration Guide for information about replacing software images.

Step 2 Turn the power switch OFF and disconnect site power.

Step 3 Remove all interface cables from the DFC cards.

For DC-powered units only, note the following warning.


Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.


Step 4 Attach an ESD-preventive wrist strap.

Step 5 Remove the chassis cover. (See the previous procedure in the section "Replacing the Chassis Cover" on page A-1.)

Step 6 Place the chassis so that the system card is oriented with the Flash memory SIMMs toward you. (See Figure A-4.) The system code SIMM sockets are labeled SIMM0 and SIMM1; the rxboot SIMM socket is labeled SIMM.

Step 7 Remove the existing Flash memory SIMM by pulling outward on the socket latches and then lifting the SIMM out of the socket (see Figure A-9).


Caution To prevent damage, do not press on the center of the SIMMs. Handle each SIMM carefully.

Figure A-9 Removing the Flash Memory SIMM

Step 8 Repeat these steps for all the Flash memory SIMMs that you need to replace.


Caution Some Flash memory SIMMs have the components mounted on the rear side. To prevent damage when you insert the SIMM, always use the polarization notch as a reference, not the position of the components on the SIMM.

Step 9 Insert the new SIMM by sliding the end with the metal fingers into the appropriate SIMM socket at approximately a 45-degree angle to the system card. (See Figure A-10.)

Figure A-10 Inserting the Flash Memory SIMM

Step 10 Gently rotate the SIMM until the latch on either side snaps into place. Do not use excessive force because the connector might break. When inserting the new SIMM, make sure that the polarization notch is located at the right end of the SIMM socket.

Step 11 Replace the chassis cover. (See the instructions in the following section "Replacing the Chassis Cover.")

Step 12 Replace any cards removed. (Refer to the Cisco AS5350 and Cisco AS5400 Universal Gateway Card Installation Guide for instructions on installing various cards.) Connect the universal gateway to a console terminal.

Step 13 Power ON the universal gateway. If any memory-related error messages appear, remove the Flash memory SIMM and reinstall it, taking care to seat the SIMM firmly in the socket.

Step 14 Reformat Flash memory.


Replacing the Chassis Cover

This section describes the procedure for replacing the chassis cover.

Required Tools and Equipment

Medium Phillips screwdriver

Four screws

Cable ties

Chassis Cover Replacement

To replace the chassis cover, follow these steps:


Step 1 Place the chassis bottom so that the front panel is facing you.

Step 2 Hold the chassis cover over the chassis bottom, and align each of the cover tabs with the chassis tabs at the top rear of the chassis, as shown in Figure A-11.

Figure A-11 Replacing the Chassis Cover

Step 3 Lower the front of the top cover to close the chassis, and ensure the following:

The chassis cover tabs fit under the edge of the chassis rear panel so that they are not exposed.

The chassis tabs fit under the chassis cover so that they are not exposed. (See Figure A-12.)

Figure A-12 Cisco AS5400 Chassis

Step 4 Secure the chassis cover with four screws.

Step 5 Reinstall the chassis on a rack, desktop, or table.

Step 6 Reinstall all interface cables.

Step 7 Reconnect the two AC power cords to the power supply. Or, if using DC power, refer to Figure A-13, and then complete steps a through d.


Warning The illustration shows the DC power supply terminal block. Wire the DC power supply using the appropriate wire terminations at the wiring end, as illustrated. The proper wiring sequence is ground to ground, return to return, and negative to negative. Note that the ground wire should always be connected first and disconnected last. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.


Figure A-13 DC Power Supply Connections


Caution Do not overtorque the terminal block contact screws. The recommended torque is 5.0 in.-lb (0.56 N-m).

a. Insert the safety ground (green wires) into the terminal block ground connectors and tighten the locking screws. Ensure that no bare wire is exposed.

b. Insert the 48 VDC wires into the terminal block positive connectors (+) and tighten the locking screws. Ensure that no bare wire is exposed.

c. Insert the -48 VDC wires into the terminal block negative connectors (-) and tighten the locking screws. Ensure that no bare wire is exposed.

d. Make sure the power supply cords are secured to the cable strain-relief clamps on the DC power supply with cable ties.


Warning After wiring the DC power supply, remove the tape from the circuit breaker switch handle and reinstate power by moving the handle of the circuit breaker to the ON position. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.


Step 8 Power ON the universal gateway.

The internal power supply fan should turn on.


Caution Do not connect the 48 VDC wire to the chassis. A single-point ground is recommended.