PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 256

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

Semiconductor Group
Figure 95
ELIC
C/I =
HDLC occupied by other Terminal:
C/I
HDLC assigned:
C/I = 1000
HDLC ready:
C/I
D-Channel Request by the Terminal
=
=
R
xxxx
1100
1100
IOM -2
R
HDLC-Frame on D-Channel
Delay TD2
Delay TD2
Delay TD2
IEC-Q
AFE/DFE
"00" on D-Channel
EOC 25 H
EOC
EOC 25 H
27
H
256
U
k0
D-Channel fied to "0"
S/G
HDLC-Controller available
D-Channel
Transparent
S/G
D-Channel Transparent
S/G = 1
D-Channel Transparent
IEC-Q V5.1
=
=
Transparent;
1;
Delay TD1
"stop"
IOM -2
Application Hints
R
Data Sheet 01.99
BAC
BAC = 0
HDLC
Frame
BAC = 1
ITD08122
TE Mode
=
PEB 2091
PEF 2091
1