Install Guide

Optic removal
Remove an optic by pushing the tab on the optic and sliding the optic from the port.
When removing optics with direct attach cables (DACs) from the port, pull the release tab firmly and steadily. Before pulling the
release tab, you may need to gently push the optic into the port to ensure it is seated properly. Do not jerk or tug repeatedly on
the tab.
Split ports
The S4048T-ON supports splitting a single 40G QSFP+ port into four 10G ports using one of the supported breakout cables.
System power-up
Supply power to the S4048T-ON after it is mounted in a rack or cabinet.
Dell EMC recommends reinspecting your system before powering up. Verify the following:
● The equipment is properly secured to the rack and properly grounded, optional.
● The equipment rack is properly mounted and grounded, optional.
● The ambient temperature around the unit, which may be higher than the room temperature, is within the limits specified for
the S4048T-ON, see Specifications.
● There is sufficient airflow around the unit.
● The input circuits are correctly sized for the loads and that you use sufficient overcurrent protection devices.
● All protective covers are in place.
● Blank panels are installed if you do not install optional modules.
NOTE:
A US AC power cable is included for powering up an AC power supply. You must order all other power cables
separately.
NOTE: ESD damage can occur if components are mishandled. Always wear an ESD-preventive wrist or heel ground strap
when handling the S4048T-ON system and its components.
Power up sequence
When the system powers up, the fans immediately come on at high speed. The fan speed slows as the system boots up.
Before you install an OS
After powering on the S4048T-ON system, it goes through a power-on self-test (POST).
POST runs every time the switch initializes and checks hardware components to determine if the switch is fully operational
before booting. After POST, the system uses the Grub bootloader.
Use the up and down arrow keys to select which entry is selected. To edit the commands before booting, press Enter to select
an OS or enter e. Enter c for a command line. The selected entry runs automatically in the operating system.
Grub bootloader example
GNU GRUB version 2.02~beta2+e4a1fe391
+----------------------------------------------+
|*ONIE: Install OS |
| ONIE: Rescue |
| ONIE: Uninstall OS |
| ONIE: Update ONIE |
| ONIE: Embed ONIE |
| ONIE: Diag ONIE |
| |
S4048T-ON installation
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