23 / 58 page
IP113M LF
Preliminary Data Sheet
2.5
Remote monitor without SMI programming
2.5.1
Auto sends (Status change notice)
IP113M LF sends out status frame without receiving status request frame if pin AUTO_SEND is pulled
high. It sends out the first status frame onto the fiber port when the link status of fiber port has established.
It sends out status frames when the status on TP port has changed. IP113M LF supports two types of
frame. For a TS-1000 maintenance frame, C[9:8] is 2’b10 and S[15:0] is defined as that in TS-1000
standard. For an ICplus maintenance frame, C[9:8] is 2’b11 and S[15:0] is the content of MII register 22. It
carries ICplus private defined information. User can select the frame type by programming MII register
20.10. Central IP113M LF uses the mechanism to get the status of the remote IP113M LF even if there is
no SMI programming.
Option A
Central IP113M LF sends indication frames to terminal IP113M LF if its status is changed.
IP113M LF
(terminal)
IP113M LF
(central)
FX
TP
TP
Maintenance frame
(C1=1, C2-3=01, C8-9= 01)
status changed !!
Option B
Terminal IP113M LF sends indication frames to central IP113M LF if its status is changed.
IP113M LF
(terminal)
IP113M LF
(central)
FX
TP
TP
Maintenance frame
(C1=0, C2-3=01, C8-9= 01)
status changed !!
CRC polynomial for maintenance frame: X8 + X2 + X + 1
X0
X1
X2
X3
X4
X5
X6
X7
data in
CRC + data
CRC calculation
23/58
April 9, 2007
Copyright © 2004, IC Plus Corp.
IP113M LF-DS-R11
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
