| OID | Object | Syntax | Max Access | Description | Implemented Specifications | 
|---|---|---|---|---|---|
| 1.3.6.1.4.1.2011.5.25.188.1.1 | hwDeviceEsn | OCTET STRING | read-only | The equipment serial number of device.Its type is string.If the esn of lr0 is xxx, then the esn of lrn is xxx.ss,ss is the lrn's id. | This object is implemented as defined in the corresponding MIB files. |