參數(shù)資料
型號(hào)： MH89790BN
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)： 6/32頁(yè)
文件大?。?/td> 488K
代理商： MH89790BN
4-192
MH89790B
Preliminary Information
Figure 6 - ST-BUS Stream Format
CHANNEL
31
0
30
BIT
7
CHANNEL
CHANNEL
CHANNEL
31
CHANNEL
0
BIT
6
BIT
5
BIT
4
BIT
3
BIT
2
BIT
1
BIT
0
Least
Significant
Bit (Last)
Most
Significant
Bit (First)
(8/2.048)
μ
s
125
μ
s
Data Input (DSTi)
The MH89790B receives information channels on
the DSTi pin. Of the 32 available channels on this
serial input, 30 are defined as information channels.
They are channels 1-15 and 17-31. These 30
timeslots are the 30 telephone channels of the CEPT
format numbered 1-15 and 16-30.
Timeslot 0 and 16 are unused to allow the
synchronization and signalling information to be
inserted, from the Control Streams (CSTi0 and
CSTi1). The relationship between the input and
output ST-BUS stream and the CEPT line is
illustrated in Figures 7 to 11. In common channel
signalling mode timeslot 16 becomes an active
channel. In this mode channel 16 on DSTi is
transmitted on timeslot 16 of the CEPT link
unaltered. This mode is activated by bit 5 of channel
31 of CSTi0.
Control
Input 0 (CSTi0)
All the necessary control and signalling information
is input through the two control streams. Control
ST-BUS input number 0 (CSTi0) contains the control
information that is associated with each information
channel. Each control channel contains the per
channel digital attenuation information, the individual
Table 2. Per Channel Control Word: Data Format for CSTi0 Channels 0-14, and 16-30
BIT
7
NAME
DATA
DESCRIPTION
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.
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.
Receive Attenuation Pad:
Per timeslot receive attenuation control bits.
RXPAD4
0
0
0
0
1
1
1
1
1
Transmit Attenuation Pad:
Per timeslot transmit attenuation control bits.
TXPAD4
0
0
0
0
1
1
1
1
1
6
LOOP
5,4,3
RXPAD4,2,1
RXPAD2
0
0
1
1
0
0
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
TXPAD2
0
0
1
1
0
0
1
TXPAD1
0
0
1
0
1
0
1
0
Gain (dB)
0
-1
-2
-3
-4
-5
-6
1
相關(guān)PDF資料
PDF描述
MH89790BS Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
MH89791 CEPT PCM 30 Transmit Equalizer Advance Information
MH89792-1 E1 Transceiver Preliminary Information
MH89792 E1 Transceiver Preliminary Information
MH89792-2 E1 Transceiver Preliminary Information
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MH89790BS 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ST-BUS⑩ FAMILY CEPT PCM 30/CRC-4 Framer & Interface Preliminary Information
MH89791 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CEPT PCM 30 Transmit Equalizer Advance Information
MH89792 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver Preliminary Information
MH89792-1 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver Preliminary Information
MH89792-2 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver Preliminary Information
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