Which port should I plug the PTN905E optical module into

The PTN905E optical module should be plugged into the designated optical interface on the router, typically a GE (Gigabit Ethernet) or XGE (10 Gigabit Ethernet) optical port, depending on the module type.

Port Selection

The PTN905E supports multiple optical interfaces, including: FE/GE optical interfaces: For Fast Ethernet (100 Mbps) or Gigabit Ethernet (1 Gbps) SFP modules.

XG

E optical interfaces: For 10 Gigabit Ethernet SFP+ modules. You should match the module type to the corresponding port. For example, a 1G SFP module must be inserted into a GE port, while a 10G SFP+ module requires an XGE port.

Inserting a 10G module into a 1G-only port will not work and may cause connectivity issues. Compatibility ConsiderationsSFP vs SFP+: SFP+ ports support higher speeds (up to 10 Gbps) and are backward compatible with some 1G SFP modules, but auto-negotiation is not guaranteed for fiber optics. Check the module specifications: Ensure the optical module is compatible with the PTN905E port type and speed.

Huawei documentation often lists supported SFP/SFP+ modules for each interface. Physical installation: Insert the module gently into the port until it clicks, and connect the fiber cable to the module's LC or SC connector as appropriate.

Best Practices

Verify the port label on the PTN905E chassis; GE and XGE ports are usually clearly marked. Avoid forcing the module into a port; SFP and SFP+ modules are keyed to prevent incorrect insertion. After installation, check the link status LEDs to confirm connectivity.

By following these guidelines, you can ensure the PTN905E optical module is installed in the correct port, maintaining proper network performance and avoiding hardware issues.