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MT9074AL 参数 Datasheet PDF下载

MT9074AL图片预览
型号: MT9074AL
PDF下载: 下载PDF文件 查看货源
内容描述: T1 / E1 / J1单芯片收发器 [T1/E1/J1 Single Chip Transceiver]
分类和应用: 电信集成电路
文件页数/大小: 122 页 / 371 K
品牌: MITEL [ MITEL NETWORKS CORPORATION ]
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MT9074  
Advance Information  
Frame # Ft  
Fs Notes Frame # Ft  
Fs Notes Frame # Ft  
Fs  
Notes  
1
2
1
0
1
0
1
0
1
0
1
0
1
0
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
1
0
1
0
1
0
1
0
1
0
1
0
C
o
n
c
e
n
t
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
62  
63  
64  
65  
66  
67  
68  
69  
70  
71  
72  
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
1
1
1
0
0
0
1
1
1
R
e
s
y
n
c
h
r
X
X
X
X
X
X
X
X
X
X
X
S
S
S
C
C
C
A
A
L
S = Spoiler Bits  
3
4
5
6
C = Maintenance Field Bits  
7
8
r
9
a
t
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
o
n
i
o
r
A = Alarm Field Bits  
z
a
t
F
i
i
e
l
L = Line Switch Field Bits  
o
n
d
L
d
a
t
B
i
L
t
L
a
s
S
S = Spoiler Bits  
Table 9 - SLC-96 Framing Structure(T1)  
E1 Digital Interface  
PCM 30 time slot 0 is reserved for basic frame  
alignment, CRC-4 multiframe alignment and the  
communication of maintenance information. In most  
configurations time slot 16 is reserved for either  
Channel Associated Signalling (CAS or ABCD bit  
signalling) or Common Channel Signalling (CCS).  
The remaining 30 time slots are called channels and  
carry either PCM encoded voice signals or digital  
data. Channel alignment and bit numbering is  
consistent with time slot alignment and bit  
numbering. However, channels are numbered 1 to 30  
and relate to time slots as per Table 10.  
PCM 30 (E1) basic frames are 256 bits long and are  
transmitted at a frame repetition rate of 8000 Hz,  
which results in an aggregate bit rate of 256 bits x  
8000/sec = 2.048 Mbits/sec. The actual bit rate is  
2.048 Mbits/sec +/-50 ppm encoded in HDB3 format.  
The HDB3 control bit (page 01H, address 15H, bit 5)  
selects either HDB3 encoding or alternate mark  
inversion (AMI) encoding. Basic frames are divided  
into 32 time slots numbered 0 to 31, see Figure 34.  
Each time slot is 8 bits in length and is transmitted  
most significant bit first (numbered bit 1). This results  
in a single time slot data rate of 8 bits x 8000/sec. =  
64 kbits/sec.  
PCM  
Timeslots  
30  
0
0
1,2,3...15 16 17,18,19,... 31  
1,2,3...15 16 17,18,19,... 31  
Voice/Data  
Channels  
(DSTi/o  
and  
It should be noted that the Mitel ST-BUS also has 32  
channels numbered 0 to 31, but the most significant  
bit of an eight bit channel is numbered bit 7 (see  
Mitel Application Note MSAN-126). Therefore, ST-  
BUS bit 7 is synonymous with PCM 30 bit 1; bit 6  
with bit 2: and so on (Figure 34).  
CSTi/o)  
Table 10 - STBUS vs. PCM-30 to Channel  
Relationship(E1)  
16  
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