PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 74

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

Semiconductor Group
Figure 27
– C/I0 in IOM
DU / DD
– C/I1 in IOM
DU / DD
– C/I2 in IOM
FSC
DD
DU
D:
C/I:
MR, MX:
C/I1 to C/I6 are used for control of a transceiver or an other device in IOM
MR, MX:
E:
BAC-bit
B1
B1
C/I6
IOM
Terminal Frame Structure of the IOM
®
®
®
D
-2 Channel 0:
-2 Channel 1:
-2 Channel 2:
B2
B2
R
Channel 0
two bits for the 16 kbit/s D-channel
The four command/indication (C/I) bits are used for control of the U
transceiver
functions).
two bits MR and MX for the handshake in the Monitor Channel 0
channel 1 (activation/deactivation and additional control functions).
two bits MR and MX for handshake in the Monitor Channel 1
D-echo bits
(Bus ACcessed). When the TIC bus is occupied the BAC-bit is low.
MON0
MON0
C/I5
D
C/I0
C/I0
C/I4
C/I4
IC1
IC1
(activation/deactivation
IOM
IC2
IC2
R
125 s
C/I3
C/I3
Channel
74
MON1
MON1
1
C/I1
C/I1
C/I2
C/I2
®
-2 Interface
and
C/I1
C/I1
IOM
Functional Description
R
Channel
additional
MR
MR
Data Sheet 01.99
2
C/I2
C/I2
PEB 2091
PEF 2091
control
MX
MX
ITD09787
B1
B1
®
-2