Specifications

Installation and Operation Manual Appendix C I2C Interface Management
MiRICi-E3T3 Ver. 2.2 Parameters C-7
Index R/W Parameter
Length
Value Description
0x12E R+W 4 VLAN management:
Byte 0:
0 – disable VLAN management
1 – enable VLAN management
Bytes 1-2, VLAN ID 0-4094
Byte 3, Priority 0-7
Default:
0 – disable VLAN management
1 – ID
0 – Priority
0x12f R+W 1 Management access
Digit0 = WAN
Digit1 = LAN
0 = Disable
1 = Enable
Default:
0x3
Enable management via LAN and WAN.
0x130 R+W 1
I
2
C cycle stretching mode
0 = Without stretching
1 = Normal
Default:
0x1
I
2
C – Normal operation.
0x134 R+W 4 Loop Detect VLAN
Bytes 0 = LAN Loop Detect
Bytes 1-2 = VLAN Id 1-4095
Bytes 3 = WAN Loop Detect
0 = Disable
1 = Enable
0 – Disable
0x140 R+W 4 VLAN Stacking
Bytes 0 = VLAN Tag Stacking
Bytes 1-2 = VLAN Id 0-4095
Bytes 3 = Priroity 0-7
0 = Disable
1 = Enable
0 = Disable
I
2
C Cycle Stretching
The I
2
C specifications allow the slave (SFP) to elongate read or write cycles
executed by the host, by pulling the clock signal down. This indicates to the host
that the SFP is not ready to complete the cycle. Some host equipment does not
support this cycle stretching functionality. To handle those cases, MiRICi-E3T3 can
be configured to work with or without cycle stretching functionality.
During the first five seconds after MiRICi-E3T3 is inserted into the host SFP
socket, MiRICi-E3T3 responds to I
2
C messages without using cycle stretching
functionality. After the first five seconds MiRICi-E3T3 handles I
2
C messages
according to the configured I
2
C cycle stretching mode:
• Normal operation – MiRICi-E3T3 users I
2
C cycle stretching. This is the default
mode.
• Without stretching – MiRICi-E3T3 responds to messages from the host
without using cycle stretching functionality. This allows hosts that do not