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YTD439 Datenblatt(PDF) 9 Page - List of Unclassifed Manufacturers

Teilenummer YTD439
Bauteilbeschribung  ISDN BRI controller for Terminal Equipment with built-in DSU
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TD Switch Block
The TD switch block consists of the time-division switch. It allows the replacement of
data of each channel on the PCM highway. By using the TD switch, the switch control of
B channel data can be facilitated on terminals with multi-functionality such as
extensions, three-way calls, and holding tone.
YTD439 supports 512 kHz to 2,048 kHz PCM highway and can perform switching on 8
channels. You can specify which output channels to connect the 8 channels of input
through the I/O register. One-to-one connection and one-to-multi-point connections are
supported.
The B channel data control block and the layer 1 control block (B channel data) are
connected to the PCM highway internally in the YTD439, and two channels are used by
each. The remaining four channels are connected to the PCM highway pins and allows
connection to arbitrary channels such as an external CODEC.
TDSW input
REGX5a-h
TDSW output
TD switch block
Input PCM Highway
Output PCM Highway
HW_IN pin
(512 k - 2,048 kHz)
SYNC_IN pin
(8 kHz)
HW_OUT pin
(512 k - 2,048 kHz)
SYNC_OUT pin
(8 kHz)
Layer 1 control
block
Time
slot 0
Time
slot 1
Time
slot 2
Time
slot 3
Time
slot 4
Time
slot n
n:7 (Min.) - 31 (Max.)
Time
slot n-1
Time
slot 0
Time
slot 1
Time
slot 2
Time
slot 3
CHI_0
CHI_1
CHI_2
CHI_3
CHI_4
CHI_5
CHI_6
CHI_7
CHO_0
CHO_1
CHO_2
CHO_3
CHO_4
CHO_5
CHO_6
CHO_7
Time
slot 4
Time
slot n
n:7 (Min.) - 31 (Max.)
Time
slot n-1
B-ch data control block
(CH-A)
(CH-B)
(B1)
(B2)
REG1
Layer 1 control
block
B-ch data control block
(CH-A)
(CH-B)
(B1)
(B2)
REG1


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