About Equipment Product model Explanation _ router, switch

Often meet someone in the QQ group to ask about the product of specific model number of the meaning of today's summary of the content to be posted for your reference.
LI (Lite software Image) indicates that the device is a weak feature version.
SI (Standard software Image) indicates that the device is a standard version and contains the underlying features.
EI (Enhanced software Image) indicates that the device is an enhanced version and contains some advanced features.
HI (Hyper software Image) indicates that the device is an advanced version and contains some of the more advanced features
Z, indicating no upstream interface; (new product does not allow this bit)
G, representing the uplink gbic interface;
P, representing an upstream SFP interface;
T, which indicates an uplink RJ45 interface;
V, indicating uplink VDSL interface;
W, which represents an uplink configurable WAN interface;
C, indicating that the uplink interface can be matched;
M, which indicates that the upstream interface is a multimode light port;
S, which indicates that the upstream interface is a single-mode port;
F, the downlink interface for the template board, can be inserted into the interface board or electrical interface board. Mainly for the compatibility of 3526f,3526ef,3552f and other old products named.
When present, indicates that the upstream interface is composite of multiple interface types
Note: The combo port is not displayed in the name.

Let's take an example:
Quidway S3928p-si
P, representing the uplink SFP interface; SI (Standard software Image) indicates that the device is a standard version and contains the underlying attributes.
28=24 a 10/100m+4 an SFP interface.