PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 132

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

Semiconductor Group
4.3.7
The TE initiates complete activation with INFO 1 leading to "SAI" = (1). Case 1 requires
the exchange side to acknowledge the TE activation by sending C/I = "AR", Case 2
activates completely without any LT confirmation.
Figure 59
Activation Initiated by TE with U Active
INFO
INFO
INFO 1
INFO 2
INFO 3
INFO 4
S/T
TE Activation with U Active and Exchange Control (case 1)
0
0
SBCX
IOM -2
NT
DC
AR
AR
DI
AI
AI
R
IEC-Q
SL3T
SL3T
SL3T act =1 dea =1 uoa =1
SN3
SN3
SN3
U-Reference Point
act = 0 dea =1 uoa =0
act
132
act =0 sai=0
act
0 =
act
SN3T
SL3T
0 =
1 =
dea
sai
sai
1 =
1 =
1 =
uoa
1 =
IEC-Q
Operational Description
IOM -2
UAR
UAI
UAI
AR
AR
LT
AI
R
Data Sheet 01.99
EPIC
ITD04247
PEB 2091
R
PEF 2091