psf21911 ETC-unknow, psf21911 Datasheet - Page 33

• Manufacturer Part Number: psf21911
• Description: Isdn Echocancellation Circuit Terminal Applications Iec-q
• Manufacturer: ETC-unknow

– C/I2 in IOM
DU
DD
2.3.1.2
In NT mode the IEC-Q TE provides a data clock DCL with a frequency of 512 kHz. As a
consequence the IOM-2 interface provides only one channel with a nominal data rate of
256 kbit/s.
• Channel 0 contains 144 kbit/s (for 2B+D) plus Monitor and Command/Indication
The IOM-2 signals are:
DIN, DOUT
DCL
FSC
Figure 14 Definition of the IOM
Semiconductor Group
FSC
DD
DU
channels.
E:
BAC-bit
S/G-bit
A/B-bit
TBA0-2:
NT Mode Structure
B1
B1
®
256 kbit/s
512 kHz output
8 kHz output
E
1
-2 Channel 2:
D-echo bits
(Bus ACcessed). When the TIC bus is occupied the BAC-bit is low.
(Stop/Go), available to a connected HDLC controller to determine if
it can access the D-channel (S/G = 1: stop, S/G = 0: go).
(available/blocked), supplementary bit for D-channel control.
(A/B = 1: D-channel available, A/B = 0: D-channel blocked).
TIC Bus Address
E
1
B2
B2
BAC
S/G
®
-2 Frame in NT Mode
IOM Channel 0
R
125
TBA2
A/B
µs
33
MONITOR
MONITOR
TBA1
1
TBA0
D
D
1
C/I
C/I
IOM®-2 Interface
1
1
M
R
M
R X
PSB 21911
PSF 21911
M
M
X
ITD09788
1
1
11.97