Appendix B

Installing Modules and SIMMs

This appendix provides the procedures for installing optional modules in the 3000 Series Secure Gateway Router and for installing and removing a SIMM.

CAUTION:
Before following the procedures in this appendix, see the Safety Information on page viii.

Installing a Module

Installing a SIMM

Removing a SIMM

Installing a Module

The procedure for installing a module in a 3000 Series is basically the same for all the modules.

To install a module . . .

: 1. Turn off power to your 3000 Series.
: 2. Disconnect all network connections, including connections to the telephone system.
: 3. Remove the cover by unscrewing the two screws on each side of the unit and the three screws on the underside of the unit's chassis and lifting off the cover.
: 4. Remove the screws from the standoffs of the slot that you want to use.
: 5. Remove the module retaining bar by removing the three fastening screws.
: 6. Place the module in the slot that you want.

Notes:

You can install the ISDN modules only in slot 3. You can install all other modules in any of the three configurable slots.
When you install an ISDN, SDSL, DDS, T1, or E1 module, do not connect the telephone line until you have installed the module itself.

: a. Line up the module with its two screw holes directly over the two standoffs.

: b. Press the module into place so that the connector on its underside sits firmly in the connector on the motherboard. Be sure that you have made a firm connection.

: c. Screw the module to the two standoffs.

: d. Re-install the module retaining bar with its three retaining screws.

CAUTION:

If you have a slot in your 3000 Series that does not have a module installed in it, be sure to install a blank slot cover in each open slot to ensure proper airflow inside the chassis.

7. Replace the cover.

Be careful to line up the motherboard's screw holes with the chassis' screw holes.

Installing a SIMM

You can upgrade your 3000 Series memory (DRAM) to 24, 40, or 72 MB by installing a single in-line memory module (SIMM).

Note: To be sure that you have the appropriate SIMM for upgrading your 3000 Series memory, contact Nx Networks.

: 1. Turn off power to your 3000 Series.
: 2. Disconnect all network connections, including connections to the telephone system.
: 3. Remove the cover by unscrewing the two screws on each side of the unit and the three screws on the underside of the unit's chassis and lifting off the cover.
: 4. Seat the SIMM securely into place. Be careful to press the SIMM firmly into place.

5. Press the SIMM back (toward the center of the motherboard) so that it sits at an angle in its slot.

6. Replace the cover.

Be careful to line up the motherboard's screw holes with the chassis' screw holes.

Removing a SIMM

To remove a single in-line memory module (SIMM) . . .

1. Turn off power to your 3000 Series.

2. Disconnect all network connections, including connections to the telephone system.

3. Remove the cover by unscrewing the two screws on each side of the unit and the three screws on the underside of the unit's chassis and lifting off the cover.

4. Press the detent tabs away from the center line and move the SIMM into an upright position.

5. Remove the SIMM from its slot.

6. Install the new SIMM. See Installing a SIMM.

7. Replace the cover.

Be careful to line up the motherboard's screw holes with the chassis' screw holes.

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