There are four hardware versions of the G450, referred to as G450 1.x, G450 2.x, G450 3.x and G450 4.x. The version of the G450 is printed on the label displayed on the rear of the G450 chassis.

In cases where the instructions differ depending on the G450 version, instructions are given for both versions.

RAM cards are not supported for G450 4.x.

The G450 has two RAM slots. The basic configuration includes one 256 MB RAM card.

The slots are located on the G450 main board. You must pull out the main board to remove or insert a memory card. The G450 supports hot insertion and removal of the main board without power drop. However, all services are suspended while the G450 main board is out, and all calls passing through the gateway are disconnected. Any translation and other data that is in the running configuration but has not been saved to the startup configuration is lost.

To increase RAM memory in the gateway:

• In the G450 1.x, replace the 256 MB RAM card with the 512 MB RAM card provided in the kit.

• In the G450 2.x and 3.x versions, remove the RAM card from the main board and replace it with the 512 MB RAM card provided in the kit.