Panasonic UF-E1 Service Manual page 167

State No. 0
Event
State Name Initial
Lower position Up 2
Lower position Down
Link open →Link OK
Layer start /1 1
Link close→Link NG 0
Time out/ Re-try counter > 0
Time out/ Re-try counter = 0
Setting request receive
(all accept)
Setting request receive
(part reject)
Setting Ack receive
Setting negate/Reject receive
End request receive
End Ack receive
Unknown code receive
Reject receive
(Normal-Note1)
Reject receive
(Fatal-Note 2)
Echo/Discard/ID/Remainder
receive
How to read the table: To the left of / is action to event, to the right of / is the state after the action. With-
out /, state transition only. Blank is no action.
Code: irc: restart, initialize counter, Zrc: restart, set counter to 0 CR: setting request, CA: setting
acknowledge, CN/ setting negate/reject TR: Termination request, TA: termination acknowledge CJ:
Code reject
Note1: Normal code rejected, Protocol rejected for NCP
Note2: Fatal rejection that makes connection impossible. (code rejection for setting request, (protocol
reject for LCP)
Note3: Load option (restart)(Donw+Up by user open)
Note4: Load option (passive) (Wait for setting request, layer will not be terminated.)
Note5: Cross-connection: Simultaneous re-send and receive. Duplicate reception of response. (Load
error, minimum log)
a. Link Dead Phase
This phase is a condition where the communication system is physically or electrically dysfunc-
tional. (For example, this is when the carrier detection (CD) of the modem is down.) When CD is up
(ON) and lines are connected, PPP shifts to link establishment phase.
Table 6.5.2.4 PPP state transition table (detailed)
1 2 3
Starting Closed Stopped
irc,
CR Trans. /6
0 Layer start /1 0
irc, 3
CR Trans. /6 (Note 3)
Layer stop /0 2 2
TA Send. /2 irc,
CR&CA
Send. /8
TA Send. /2 irc,
CR&CN
Send. /6
TA Send. /2 TA Send. /3 4
TA Send. /2 TA Send. /3 4
TA Send. /2 TA Send. /3 TA Send. /4 TA Send. /5 TA Send. /6 TA Send. /6 TA Send. /6 Layer down,
2 3
CJ Send. /2 CJ Send. /3 CJ Send. /4 CJ Send. /5 CJ Send. /6 CJ Send. /7 CJ Send. /8 CJ Send. /9
2 3
Layer end /2 Layer end /3 Layer end /2 Layer end /3 Layer end /3 Layer end /3 Layer end /3 Layer down,
2 3
4 5
Closing Stopping Req-Sent
1 1
5 5 6
(Note 3) (Note 3)
4 4 irc,
TR Trans. /4
TR Trans. /4 TA Trans. /5 CR Trans. /6 CR Trans. /6 CR Trans. /8
Layer end /2 Layer end /3 Layer end /3
(Note 4)
4 5 CA Send. /8 CA Send,
4 5 CN Send. /6 CN Send. /7 CN Send. /6 Layer down,
5 irc/7
5 irc,
CR Send. /6
Layer end /2 Layer end /3 6
4 5 6
4 5 6
163
6 7 8
Ack-Rcvd Ack-Sent
1 1 Layer down /
1
7 8 9
(Note 3)
irc, irc, Layer down,
TR Trans. /4 TR Trans. /4 irc, TR Send
/4
Layer end /3 Layer end /3
(Note 4) (Note 4)
CA Send. /8 Layer down,
Layer up/9 CR&CA
Send. /8
CR&CN
Send. /6
CN Send. /6 irc, Layer up/ Layer down,
(Note 5) 9 CR Send. /6
(Note 5)
CN Send. /6 irc, Layer down,
(Note 5) CR Send. /8 CR Send. /6
(Note 5)
zrc, TR Send
/5
6 8 Layer down,
CR Send. /6
6 8 9
irc, TR Send
/5
7 8 Echo
response
(Echo
request) /9
UF-E1
9
Opened