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ISDN U
N
IT
A8
1
6
HOW TO READ THE DUMP LIST
A-7
SM
A230/A231/A232
Layer 1 Status
The ITU-T I.430 recommendation (the basic user-network interface - Layer 1
specification) specifies layer 1 activation/deactivation procedures.
Before understanding the procedures, the status and INFO signals should be
noted.
TE (Terminal Equipment) Status
Status
Description
F1
TE is turned off.
F2
TE is turned on, but no signal is exchanged.
F3
TE is stopped. No signal is exchanged between TE and NT.
F4
TE is waiting for the response to INFO1 signal from NT.
F5
TE is checking if the signal from the NT is INFO2 or INFO4.
F6
TE is waiting for signals from NT after receiving INFO2 signal.
F7
TE and NT are in synchronized condition.
F8
TE has failed to synchronize to NT, and waiting for the stop request from NT
NT (Network Termination) Status
Status
Description
G1
NT is stopped.
G2
NT is sending INFO2 signal.
G3
TE and NT are in synchronized condition.
G4
NT is terminating itself.
INFO Signals
NT to TE Direction
TE to NT direction
INFO0
No signal
(11111111...)
INFO0
No signal
(11111111...)
INFO2
Activation signal in synchronized
condition
(B=0, D=0, E=0, A=0)
INFO1
Activation signal in non-
synchronized condition
(+0-0-0)
INFO4
Synchronized frame
INFO3
Synchronized frame
Содержание A230
Страница 1: ...SERVICE MANUAL 000861MIU A230 A231 A232 RICOH GROUP COMPANIES ...
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Страница 944: ...SM A203 231 A232 19 11 3 4 HELP MENU 3 4 1 HELP ABOUT SWAPUTI SwapBox And SwapFTL FUNCTIONS ...
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