Hardware Installation Guide for the Cisco VG200
Maintaining the Gateway
Table of Contents
Maintaining the Gateway
Opening the Chassis
Replacing the System-Code SIMM
Closing the Chassis
This appendix contains selected maintenance procedures you might need to perform on a Cisco Voice Gateway 200 (VG200) as your internetworking needs change.
This appendix includes the following sections:
Additional maintenance procedures are available on the Documentation CD-ROM that shipped with the gateway.
This section describes how to upgrade dynamic random-access memory (DRAM) on the system card. You might need to upgrade DRAM if you have upgraded to a new Cisco IOS software feature set or release.
To see how much memory is currently installed in the gateway, enter the show version command. Near the middle of the resulting output, a message similar to the following appears:
Cisco VG200(MPC860) processor (revision 0x200) with 28672K/4096K bytes of memory.
This line shows how much memory is installed (in this example, 28672K/4096K). The first number represents primary memory and the second number represents shared memory.
The Cisco VG200 contains two 100-pin dual in-line memory module (DIMM) sockets (or banks) for DRAM, numbered 0 and 1. (See Figure B-3.) Each socket can be filled with a 100-pin DRAM DIMM. You can use the memory-size iomem software command to configure DRAM as a mixture of shared memory, which is used for data transmitted or received by network modules, and primary or main memory, which is reserved for the CPU. For further information about this command, refer to the Cisco IOS configuration guides and command references.
This section describes the procedure for opening the chassis by removing the chassis cover.
You will need the following tools to remove and replace the DRAM DIMMs on the gateway:
Perform the following steps to remove the chassis cover:
Step 1 Power off the gateway.
Step 2 Disconnect all cables from the rear panel of the gateway.
Step 3 Remove the screws located on the top of the chassis. Note that the chassis is comprised of two sections: top and bottom.
Figure B-1: Holding Chassis for Cover Removal
Step 5 Slide the top section away from the bottom section as shown in Figure B-2 and set the top aside.
Figure B-2: Removing Chassis Cover
When the top cover is off, you will see the system cards shown in Figure B-3.
Figure B-3: System Card Layout
Perform the following steps to install the DRAM DIMM:
Step 1 Power off the gateway.
Step 2 Attach an ESD-preventive wrist strap.
Step 3 Open the cover. Follow the instructions in the "Opening the Chassis" section.
Step 4 Remove the existing DRAM DIMM by pulling outward on the connectors to unlatch it, as shown in Figure B-4. Be careful not to break the holders on the DIMM connector.
Step 5 Position the new DIMM so that the polarization notch is located at the left end of the DIMM socket, as shown in Figure B-4.
Figure B-4: Removing and Replacing the DRAM DIMM
Step 6 Insert the new DRAM DIMM by sliding the end with the metal fingers into the DIMM connector socket at approximately a 90º angle to the system card. Gently rock the DIMM back into place until the latch on either side snaps into place. Do not use excessive force because the connector might break.
Step 7 Replace the gateway cover. Follow the instructions in the "Closing the Chassis" section.
You will need the following tools to remove and replace the system-code SIMM on the gateway:
There is one system-code (Flash memory) SIMM socket on the system board. You can verify how much Flash memory is already installed in your gateway by entering the show flash EXEC command.
Perform the following steps to upgrade the system-code Flash memory SIMM:
Step 1 If you have not already done so, enter the copy flash tftp EXEC command to back up the system code.
Step 2 Power off the gateway.
Step 3 Remove all cables from the rear panel of the gateway.
Step 4 Attach an ESD-preventive wrist or ankle strap.
Step 5 Open the chassis cover. Follow the procedure in the "Opening the Chassis" section.
Step 6 Locate the system-code SIMM on the system card.
Step 7 If necessary, remove the existing system-code SIMM by pulling outward on the connector holders to unlatch the card. The connector holds the SIMM tightly, so be careful not to break the holders on the SIMM connector.
Figure B-5: Removing and Replacing the System-Code SIMM
Step 8 Position the new SIMM so that the polarization notch is located at the left end of the SIMM socket.
Step 9 Insert the new SIMM by sliding the end with the metal fingers into the SIMM connector socket at approximately a 90º angle to the system card. Gently rock the SIMM back into place until the latches on both sides snap into place. Do not use excessive force because the connector might break.
Step 10 Replace the gateway cover by performing the procedure in the following section.
Step 11 Refer to the "Procedures for Recovering Boot and System Images" section in Appendix C, "Using the ROM Monitor," for instructions on how to place the Cisco IOS image on the new SIMM.
Perform the following steps to replace the cover:
Step 1 Position the two chassis sections as shown in Figure B-6.
Step 2 Press the two chassis sections together and ensure the following:
Figure B-6: Replacing the Chassis Cover
Step 3 When the two sections fit together snugly, slide the chassis top until it fits into the front bezel.
Step 4 Replace the cover screws.
Step 5 Tighten the screws to no more than 8- or 9-inch/pound of torque.
Step 6 Reinstall the chassis on the wall, rack, desktop, or table.
Step 7 Reconnect all cables.