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ZyXEL GS1900-48HP Switch Firmware 2.00(AAHO.0)C0

The ZyXEL GS1900-48HP is a managed switch targeting small and medium-sized businesses, providing features like VLAN, QoS, ACL, LACP, and more. It supports Gigabit Ethernet connections, and up to 30W of output power for PoE+ devices. The device's firmware version is 2.00(AAHO.0)C0.


  • 48 ports (4 SFP slots) with Gigabit Ethernet support
  • IEEE 802.3af/at PoE+ support with up to 30W of output power per port
  • Advanced Layer 2 features such as VLAN, QoS, ACL, LACP and IGMP Snooping
  • Web GUI, Command Line Interface (CLI), SNMP management interfaces
  • Dedicated VLAN/Voice VLAN/OozeWatch management improve network security and management efficiency
  • Multiple deployment methods (desk or rack mount)


Model ZyXEL GS1900-48HP Switch
Standards IEEE 802.3 10Base-T Ethernet, IEEE 802.3u 100Base-TX Fast Ethernet, IEEE 802.3ab 1000Base-T Gigabit Ethernet, IEEE 802.3z Autonegotiation, IEEE 802.3x Flow Control
Performance Switching capacity: 104 Gbps, Forwarding rate (64-byte packet size): 78 Mbps, Power-on or PoE input/maximum power: 20W/1440W
Management Web-based GUI, Cloud mode, SNMP v1/v2c/v3, IPv6 management, System log, Configuration export/import
Ports 48 x 10/100/1000 Mbps RJ-45 (PoE+), 2 x 100/1000 Mbps SFP, 2 x 1000 Mbps SFP
Device Power Consumption Without PoE: 22.4W (maximum), With PoE: 736.6W (full load)

Technologies Used

The device uses a variety of networking and security technologies, such as VLAN for network segmentation, QoS for traffic prioritization, LACP for link aggregation, and SNMP for network monitoring. Additional technologies include:

  • LLDP-MED for graceful shutdown of endpoints during switch maintenance
  • RADIUS for centralized authentication
  • IGMP Snooping to optimize multicast traffic delivery
  • Port Security for protecting access to that port

Known Issues

Some common issues with the ZyXEL GS1900-48HP switch include:

  • Disconnects or poor connection quality
  • PoE devices taking a long time to boot up
  • Inability to upgrade firmware in some cases
  • Issues with web management interface being slow to respond or not displaying properly
  • Interoperability issues when using certain third-party VoIP phones


If you're experiencing issues with your ZyXEL GS1900-48HP, try:

  • Rebooting the switch
  • Checking for firmware updates and applying them, if available
  • Using alternate ports on the switch or a different cable
  • Ensuring that the switch is receiving adequate ventilation
  • Starting connected PoE devices one at a time


You can download the device driver for the ZyXEL GS1900-48HP switch from the manufacturer's website. Installation instructions for the driver may vary depending on your operating system.