Selta Alyseo 106, User Manual

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Alyseo 106

SELTA S.p.A
. All rights reserved. No parts of this document can be reproduced, memorized into archive system or transmitted
in any shape or through any means without the previous authorization of SELTA S.p.A.
2-6 Overview
Alyseo 106 User Manual
720041008-A0-GB Issue 4
The mechanism is displayed in detail by the status diagram reported in the figure. The described
parameters are completely configurable by the Alyseo terminal.
Figure 2-4 Status diagram for the fault management
Status Description Actions
PVC UP STATUS: No problem detected on i-th PVC •
CPE sends 1 LB F5 cell each T1 seconds on i-th VC
• CPE answer to LB F5 cells in reception on ATM on i-th VC
• CPE signals to CPE via i-th LMI DLCI UP
DOWN RETRY STATUS: Problem on VC ATM • CPE sends 1 LB F5 cell each T2 seconds (to Racc) on i-th VC
• CPE answer to possible AIS cells with RDI cells (to Racc)
• CPE answer to possible LB cells in reception on ATM on i-th VC
PVC DOWN STATUS: Problem on VC ATM • CPE signals to CPE via i-th LMI DLCI DOWN
• CPE sends 1 LB F5 cell each T1 seconds (to Racc) on i-th VC
•
CPE answer to possible AIS cells with RDI cells (to Racc)
• CPE answer to possible LB cells in reception on ATM on i-th VC
UP RETRY STATUS: Problem on VC ATM • CPE sends 1 LB F5 cell each T2 seconds (to Racc) on i-th VC
• CPE answer to possible LB cells in reception on ATM on i-th VC
• CPE answer to possible AIS cells with RDI cells (to Racc)
DLCI DOWN STATUS: Problem on DLCI i-th FR • CPE sends AIS cell (to Racc) on i-th VC
• CPE does not transmit LB F5 cells on i-th VC (to Racc) (
1
)
• CPE does not answer to possible LB cells sent by Racc on i-th VC
1
If it should send LB cells after an AIS, it would make the status of the ATM remote end point (access router) not valid
PVC
UP
DLCI DOWN
DOWN -
RETRY
Transition 2
Transition 1
Transition 3
Transition 4
UP -
RETRY
Transition 5
PVC -
DOWN
Transition 6
Transition 7
Transition 8
Transition 9
Transition 10