Huawei CX320 - Page 25

1 Connection status indicator 2 Data transmission status
indicator
3 PIC card handle 4 16G FC port
ESN
An Equipment Serial Number (ESN) uniquely identifies a server. An ESN is required when
you apply for technical support from Huawei.
Figure 2-8 ESN example
Callout No.
Description
1 ESN ID (two characters), which is 21 by default.
2 Material identification code (eight characters), that is, processing code.
3 Vendor code (two characters). The code 10 indicates Huawei, and other
values indicate outsourcing vendors.
4 Year and month (two characters).
l The first character indicates the year, where:
– Digits 1 to 9 indicate 2001 to 2009, respectively.
– Letters A to H indicate 2010 to 2017, respectively.
– Letters J to N indicate 2018 to 2022, respectively.
– Letters P to Y indicate 2023 to 2032, respectively.
NOTE
The years from 2010 are represented by upper-case letters excluding I, O, and Z
because the three letters are similar to the digits 1, 0, and 2.
l The second character indicates the month, where:
– Digits 1 to 9 indicate January to September, respectively.
– Letters A to C indicate October to December, respectively.
5 Serial number (six characters).
6 RoHS compliance (one character). Y indicates environmental protection
processing.
7 Internal model, that is, product name.
CX320 Switch Module
User Guide
2 Product Overview
Issue 09 (2019-08-02) Copyright © Huawei Technologies Co., Ltd. 19