參數(shù)資料
型號(hào)： PEB2245N
廠商： SIEMENS AG
英文描述： ?Multipoint Switching and Conferencing Unit - Attenuation?
中文描述： ？多點(diǎn)交換和會(huì)議股-衰減？
文件頁數(shù)： 42/70頁
文件大?。?/td> 1021K
代理商： PEB2245N
PEB 2245
Semiconductor Group
42
Table 11
Time-Slot and Line Programming for the Primary Access Configuration
The interface select bits have to be programmed as shown in the following table:
Table 12
Interface Selection Bits
Access 1 to CCM
DI0
Logical 0
D9
Inversion bit: In a multiparty conference there is some risk of instability due to
reflections at the hybrid. If these reflections are not canceled, they will be summed
up in the conference sum and will be transmitted to the subscriber, where again
they could be reflected. In very big conferences (>> 4 subscribers) this behaviour
could result in an instability.
To avoid this the PEB 2445 has the ability to invert every second conference
channel, which has no audible influence on the speech quality. By this the noise
due to reflections is compensated to a high degree.
The feature can also be applied to reduce noise due to line impedance mismatch.
D8 … D0
Logical line and time-slot number of the inputs (
see table 10 to 12
)
IA7/IA6
Logical 0
IA5 … IA0
Conference control address
2-Mbit/s input lines
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Bit
D1
D3
D8
D9
D1
D2
D8
D9
D1
D8
D9
IA0
IA2
IA7
IA0
IA1
IA7
IA0
IA7
to
to
to
D0
D2
D4
Interface select in
Line number
Time-slot number
Validity bit
Fixed to 01 (system interface)
Line number
Time-slot number
Validity bit
Fixed to 01 (system interface)
Time-slot number
Validity bit
Interface select out
Line number
Time-slot number
Fixed to 0 (system interface)
Line number
Time-slot number
Fixed to 0 (system interface)
Time-slot number
4-Mbit/s input lines
to
D0
to
D3
8-Mbit/s input lines
to
to
D0
D2
2-Mbit/s output lines
to
to
IA1
IA3
4-Mbit/s output lines
to
IA2
8-Mbit/s output lines
to
IA1
System Interface
01
Synchronous 2-MHz Interface
10
Input Lines
Output Lines
0
1
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PEB2245-N 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:multipoint switching and conferencing unit (musac)
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