PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 242

• Manufacturer Part Number: PEF2091
• Description: ICs for Communications(ISDN Echocancellation Circuit)
• Manufacturer: Siemens Semiconductor Group

Semiconductor Group
6.8.2
When initiating an activation from the terminal side, the LT must be in the
"DEACTIVATED" state. For a TE initiated activation to be successful the downstream LT
C/I-code must be DC. This is not the case if the "DEACTIVATED" state has been entered
from the "TEST" state (the last code is DR in this case).
<–––––
–––––>
–––––>
<–––––
–––––>
–––––>
<–––––
<–––––
–––––>
<–––––
NT
C/I DC
C/I DI
C/I TIM
C/I PU
C/I AR
TIM release
C/I DC
C/I AR
C/I AI
C/I AI
Complete Activation Initiated by TE
(1111
(1111
(0000
(0111
(1000
(1111
(1000
(1100
(1100
B
B
B
B
B
B
B
B
B
)
)
)
)
)
)
)
)
)
LT
C/I DC
C/I DI
C/I AR
C/I ARM
C/I UAI
C/I AI
(1111
(1111
(1000
(0111
(1100
(1001
242
B
B
B
B
B
B
)
)
)
)
)
)
<––––– ; Initial state is "Deactivated"
–––––>
–––––> ; Activation proceeds
–––––> ; :
–––––> ; :
–––––> ; Activation complete
; Start IOM
; IEC-Q is in power-up
; Start activation
;
;
Confirm that terminal is
active
®
Data Sheet 01.99
-2-clocks
Programming
PEB 2091
PEF 2091