參數(shù)資料
型號: Q6701-H6481
廠商: SIEMENS AG
英文描述: Quadruple Transceiver for S/T Interface QUAT-S
中文描述: 四聯(lián)收發(fā)器的S / T接口葛- ?
文件頁數(shù): 52/72頁
文件大?。?/td> 1267K
代理商: Q6701-H6481
PEB 2084
Semiconductor Group
52
3.6
According to CCITT recommendation I.430 a multi-frame (= 20 consecutive S/T frames)
provides an additional communication channel between TE and LT or LT and CO via S
and Q bits. Refer to
figure 28.
Two S channels (S1 and S2) can be used by the QUAT-S for communication in data
downstream direction.
The Q channel bits are defined to be the bits in the F
A
bit position and are used for
communication in data upstream direction.
S and Q Channel Access
Figure 28
Direction of S and Q Channels in Different Application Modes
The following table shows the S and Q bit positions within the multi-frame (20 S/T
frames).
Frame Number
LT to TE or
CO to LT
S11
S21
S12
S22
S13
S23
S14
S24
S11
TE to LT or
LT to CO
Q1
ZERO
Q2
ZERO
Q3
ZERO
Q4
ZERO
Q1
1
2
6
7
11
12
16
17
1
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