參數(shù)資料
型號： TECO3264
廠商： Lineage Power
英文描述： 32-Channel Echo Canceller(32通道回波清除器)
中文描述： 32通道回聲消除器（32通道回波清除器）
文件頁數(shù)： 74/128頁
文件大?。?/td> 2328K
代理商： TECO3264
Data Sheet
August 1999
TECO3264 32-Channel Echo Canceller
74
Lucent Technologies Inc.
Register Architecture
(continued)
Page 0 Read/Write Registers 000
—
07FE
(continued)
Wideband Energy Peak Factor Register
Table 34. Wideband Energy Peak Factor Register (029) [18]
Highway Bit Rate Register
Table 35. Highway Bit Rate Register (02A) [05]
Bit
7—0
Symbol
WBEPKF[7:0]
Parameter Name and Description
Wideband Energy Peak Factor [7:0].
Range: Do not change.
Step: 1.
Recommended to leave at 18 for best performance of interrelated functions.
Bit
0
Symbol
CMS
Parameter Name and Description
Bit Rate Select.
Selects the PCM highway data rate. Control is global, i.e., CMS will
affect the rate on the C, X, Y, and E PCM highways.
System designer choice. When setting registers 000—01F, channel/time-slot numbers
are rotated by one for 2.048 Mbits/s, i.e., setting for channel 31 is controlled by register
000. Linear PCM input/output is not possible for 2.048 Mbits/s since the needed extra
8 bits are not present.
0 = 4.096 Mbits/s PCM I/O.
1 = 2.048 Mbits/s PCM I/O [recommended value].
X Receive Clock Edge.
Determines the edge of the clock that will be used to sample the
XPCM data input.
1
XRCE
0 = Negative-going/falling edge sampling.
1 = Positive-going/rising edge sampling [recommended value].
X Receive Bit Offset [3:0].
These 4 bits provide a fixed offset, relative to the frame-
synchronization pulse (SYNC), for the first bit received in each time slot. The offset is the
number of data periods by which reception of the first bit on [X] is delayed. All
subsequent receptions of the first bit also follow this offset. One data period (1 bit) is
equal to 4 cycles of CK8M for CMS = 1, and 2 cycles of CK8M for CMS = 0. Received
data is sampled in the middle of the data bit.
Test Mode 0.
(109 test.) The channel to which data is sent is determined by the value of
TCHAN[4:0]. The 109 test is a test that network maintenance personnel can run remotely
to confirm the connection with the far end of the trunk first terminated, and then looped
with 10 dB attenuation, and also to test the echo canceller for double-talk operation.
5—2
XRBOFF[3:0]
6
TMODE0
0 = Disable [recommended value].
1 = Send data to one channel.
Test Mode 1.
(109 test.)
7
TMODE1
0 = Disable [recommended value].
1 = Send data to all channels.
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