s5800交换机manu-serial number含义

光转电模块，使用display transceiver manuinfo interface命令时候，显示的光转电模块Manu SN相同，几个模块显示的序列号都是210231A0AKN10B000030，想问下为什么模块的这个序列号会是一样的， 一般只有Part Number之类的是一样的，而这个模块下的manuinfo里的SN明显不是PN。 以下是我命令展示的信息。

BNQVPCSW]display transceiver manu interface t1/0/20

Ten-GigabitEthernet1/0/20 transceiver manufacture information:

  Manu. Serial Number : 210231A0AKN10B000030

  Manufacturing Date  : 2010-11-27

  Vendor Name         : H3C

[BNQVPCSW]display transceiver interface t1/0/20

Ten-GigabitEthernet1/0/20 transceiver information:

  Transceiver Type              : 1000_BASE_LX_SFP

  Connector Type                : LC

  Wavelength(nm)                : UNKNOWN

  Transfer Distance(m)          : 1000(OM4)

  Digital Diagnostic Monitoring : YES

  Vendor Name                   : H3C

  Ordering Name                 : LSWM1STK

  Part Number                   : SFP-GE-T

  Serial Number                 : 19053145041

[BNQVPCSW]display transceiver manu interface t1/0/21

Ten-GigabitEthernet1/0/21 transceiver manufacture information:

  Manu. Serial Number : 210231A0AKN10B000030

  Manufacturing Date  : 2010-11-27

  Vendor Name         : H3C

[BNQVPCSW]display transceiver interface t1/0/21

Ten-GigabitEthernet1/0/21 transceiver information:

  Transceiver Type              : 1000_BASE_LX_SFP

  Connector Type                : LC

  Wavelength(nm)                : UNKNOWN

  Transfer Distance(m)          : 1000(OM4)

  Digital Diagnostic Monitoring : YES

  Vendor Name                   : H3C

  Ordering Name                 : LSWM1STK

  Part Number                   : SFP-GE-T

  Serial Number                 : 19053145030