H3C Technologies H3C S7500E Series Switches - Manual (Page 41)

2-8
Three Port Types in an EPON System
When an S7500E switch works as an OLT device in an EPON system, the EPON system has three
port types: OLT, ONU, and UNI, as shown in
Figure 2-6 .
Figure 2-6 An EPON system
OLT port
Each PON port on an EPON card in an S7500E switch is an independent OLT device. For an S7500E
switch, a PON port is an OLT port. An OLT port number is in the format EPON card slot
number/sub-card slot number/OLT port number , such as OLT 3/0/1, as shown in Figure 2-6 .
ONU port
Each OLT port of an S7500E switch has 64 logical ONU ports. An ONU port becomes a physical port
only after an ONU device is bound with it. The configurations performed in ONU port view take effect
on the corresponding ONU device. An ONU port number is in the format EPON card slot
number/sub-card slot number/OLT port number: ONU port number , such as ONU 3/0/1:1, as shown in
Figure 2-6 .
UNI Port
A UNI port is an ONU device port connected to a user. The UNI port number supported by an S7500E
switch is in the range 1 to 80. The actual numbers vary with ONU devices. For example, when the
ONU device corresponding to ONU 3/0/1:1 in an EPON system is S3100-16C-EPON-EI, the UNI port
number is in the range 1 to 16.
S7500E OLT Configuration Task List
Figure 2-6 shows an EPON system networking diagram, which assumes that only two ONUs are
attached to one OLT port and each ONU is connected to only one user.
Based on the three port types (OLT, ONU, and UNI) shown in Figure 2-6 , this document details the
functions of an S7500E Ethernet switch working as an OLT device and the configurations for the
functions.
Complete the following tasks to configure OLT on an S7500E switch: