How Can I Determine Whether an Optical Module Is Single-Mode or Multi-Mode?

If non-Huawei-certified optical modules are used, the system may be unable to obtain correct information. You are advised to use Huawei-certified optical modules.

Run the display transceiver interface interface-type interface-number command to view information about a specified optical module. You can determine whether an optical module is a single-mode or multi-mode one according to the fiber diameter displayed in the transmission distance. In the following command output, 50 um and 62.5 um are fiber diameters, indicating multi-mode fibers. Fibers with a diameter of 9 um are single-mode fibers.

<HUAWEI> display transceiver interface gigabitethernet 0/0/1

GigabitEthernet0/0/1 transceiver information:
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Common information:
  Transceiver Type               :1000_BASE_SX_SFP
  Connector Type                 :LC
  Wavelength(nm)                 :850
  Transfer Distance(m)       :300(50um),150(62.5um)
  Digital Diagnostic Monitoring  :YES
  Vendor Name                    :SumitomoElectric
  Vendor Part Number             :HFBR-5710L 
  Ordering Name                  :
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Manufacture information:
  Manu. Serial Number            :88K056C10353
  Manufacturing Date             :2008-08-08
  Vendor Name                    :SumitomoElectric
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