Brand: NEC
Category: Other
Document Type: Installation Guide
Language: EN
Installation Guide for QX-S5500G
Uploaded: Nov. 21, 2025, 8:01 p.m.
Product Overview
This section provides panel views for various QX-S5500G series models including QX-S5524GT-4X2Q, QX-S5548GT-4X2Q, QX-S5524GT-4X1C, QX-S5548GT-4X1C, and QX-S5524GP-4X1C. It details the front and rear panel components, such as Ethernet ports, SFP+ ports, console ports, USB ports, power receptacles, grounding screws, fan tray slots, power module slots, and interface card slots. It also describes the function of various LEDs, including System Status (SYS), Port Mode, Power Module Status (PWR1/PWR2), RPS Status, and port-specific LEDs (10/100/1000BASE-T, SFP, SFP+, QSFP+, Management Ethernet). Additionally, it explains the internal cooling system, which utilizes air vents, fan trays, and built-in fans to maintain optimal operating temperatures.Troubleshooting and error codes
| LED mark | Status | Description |
| SYS | Steady green | The switch is operating correctly. |
| Flashing green (1 Hz) | The switch is performing power-on self test (POST). | |
| Steady red | The switch has failed the POST or is faulty. | |
| Flashing yellow (1 Hz) | Some ports have failed to pass POST or are faulty. | |
| Off | The switch is powered off. |
| LED mark | Status | Description |
| PWR1/PWR2 | Steady green | A power module is installed in power module slot and the power module is outputting power correctly. |
| Steady yellow | A power module is installed in power module slot, but the power module has failed or no power is input to the power module. | |
| OFF | No power module is installed in power module slot. |
| LED mark | Status | Description |
| RPS | Steady green | Both the RPS DC input and the AC input are normal. |
| Steady yellow | The RPS DC input is normal, but the AC input is disconnected or has failed. | |
| OFF | The RPS DC input is abnormal or no RPS is connected. |
| LED mark | Status | Description |
| Mode | Steady green | The port status LEDs are showing port rates. |
| Flashing yellow | The port status LEDs indicates the IRF member ID of the switch. For example, if the LEDs for ports 1 to 5 are steady green and the other LEDs are off, the IRF member ID of the switch is 5. | |
| LED mark | Description | ||
| Steady green (rate mode) | 10/100/1000BASE-T autosensing Ethernet port LED status | ||
| Steady green | A link is present on the port and the port is operating at 1Gbps. | ||
| Flashing green | The port is sending or receiving data at 1Gbps. | ||
| Steady yellow | A link is present on the port and the port is operating at 10/100Mbps. | ||
| Flashing yellow | The port is sending or receiving data at 10/100Mbps. | ||
| Flashing yellow (3Hz) | The port has failed POST. | ||
| Off | No link is present on the port. | ||
| Flashing yellow (IRF mode) | Steady green | The port status LEDs on the switch work in conjunction to indicate the IRF member ID of the switch. For example, if the LEDs for ports 1 to 5 are steady green and the other port LEDs are off, the IRF member ID of the switch is 5. | |
| LED mark | Description | ||
| Steady green (rate mode) | 100/1000Base-X SFP port LED status | ||
| Steady green | A link is present on the port and the port is operating at 1000 Mbps. | ||
| Flashing green | The port is sending or receiving data at 1000 Mbps. | ||
| Steady yellow | A link is present on the port and the port is operating at 100 Mbps. | ||
| Flashing yellow | The port is sending or receiving data at 100 Mbps. | ||
| Flashing yellow (3 Hz) | The port has failed POST. | ||
| Off | No link is present on the port. | ||
| Flashing yellow (IRF mode) | Steady green | The SFP port LEDs on the switch work in conjunction to indicate the IRF member ID of the switch. For example, if the LEDs for ports 1 to 5 are steady green and the other port LEDs are off, the IRF member ID of the switch is 5. | |
| LED mark | Description | |
| SFP+ port LED status | ||
| Steady green | A link is present on the port and the port is operating at 10 Gbps. | |
| Flashing green | The port is sending or receiving data at 10 Gbps. | |
| Steady yellow | A link is present on the port and the port is operating at 1 Gbps. | |
| Flashing yellow | The port is sending or receiving data at 1 Gbps. | |
| Flashing yellow (3 Hz) | The port has failed POST. | |
| Off | • No link is present on the port. • The port mode LED operates in IRF mode. |
|
| LED mark | Description | |
| QSFP+ port LED description | ||
| Steady green | A link is present on the port and the port is operating at 40 Gbps. | |
| Flashing green | The port is sending or receiving data at 40 Gbps. | |
| Steady yellow | A link is present on the port and the port is operating at 10 Gbps. | |
| Flashing yellow | The port is sending or receiving data at 10 Gbps. | |
| Off | No link is present on the port. | |
| Description | ||
| Management Ethernet port LED (ACT/LINK) status | Description | |
| Steady green | A link is present on the port. | |
| Flashing yellow | The port is sending or receiving data. | |
| Flashing yellow (3 Hz) | The port has failed POST. | |
| Off | No link is present on the port. | |
| LED mark | LED status | Description |
| SLOT | Steady green | The interface card is in position and is operating correctly. |
| Flashing yellow | The switch does not support the card model, or the card has failed. | |
| Off | The interface card slot is empty. |