參數(shù)資料
型號(hào)： MT8979
廠商： Mitel Networks Corporation
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁(yè)數(shù)： 11/30頁(yè)
文件大小： 190K
代理商： MT8979
ISO-CMOS
MT8979
4-97
Table 2. Per Channel Control Word: Data Format for CSTi0 Channels 0-14, and 16-30
Table 3. Master Control 1 (MCW1): Data Format for CSTi0 Channel 15
BIT
NAME
DESCRIPTION
7
DATA
Data Channel:
If ‘1‘, then the controlled timeslot on the CEPT 2048 kbit/s link is
treated as a data channel; i.e., no ADI encoding or decoding is performed on
transmission or reception, and digital attenuation is disabled.
If ‘0‘, then the state of the ADI pin determines whether or not ADI encoding and
decoding is performed.
6
LOOP
Per-Channel Loopback:
If ‘1‘, then the controlled timeslot on the transmitted
CEPT 2048 kbit/s link is looped internally to replace the data on the corresponding
received timeslot. If ‘0‘, then this function is disabled.
This function only operates if frame synchronization is received from the CEPT link.
If more than one channel is looped per frame only the first one will be active.
5,4,3
RXPAD4,2,1
Receive Attenuation Pad:
Per timeslot receive attenuation control bits.
RXPAD4
0
0
0
0
1
1
1
1
RXPAD2
0
0
1
1
0
0
1
1
RXPAD1
0
1
0
1
0
1
0
1
Gain (dB)
0
-1
-2
-3
-4
-5
-6
1
2,1,0
TXPAD4,2,1
Transmit Attenuation Pad:
Per timeslot transmit attenuation control bits.
TXPAD4
0
0
0
0
1
1
1
1
TXPAD2
0
0
1
1
0
0
1
1
TXPAD1
0
1
0
1
0
1
0
1
Gain (dB)
0
-1
-2
-3
-4
-5
-6
1
BIT
NAME
DESCRIPTION
7
(N/A)
Keep at ‘1‘ for normal operation.
6
LOOP16
Channel 16 Loopback:
If ‘1‘, then timeslot 16 on the transmitted CEPT 2048 kbit/s link
is looped internally to replace the data received on timeslot 16.
If ‘0,‘ then this function is disabled.
This function only operates if frame synchronization is received from the CEPT link and
only a single timeslot can be looped within the frame.
5,4
(N/A)
Keep at ‘1‘ for normal operation.
3,2,
1
& 0
NDBD, NDBC,
NDBB
& NDBA
Signalling Bit Debounce:
If ‘1‘, then no debouncing is applied to the received A, B, C or
D signalling bits. If ‘0‘, then the received A, B, C or D signalling bits are debounced for
between 6 and 8 ms.
相關(guān)PDF資料
PDF描述
MT8979 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
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