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參數(shù)資料
| 型號(hào)： | MH88520-1 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | German Subscriber Line Interface Circuit (SLIC) Preliminary Information |
| 中文描述： | 德國用戶線接口電路（SLIC）的初步信息 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 105K |
| 代理商： | MH88520-1 |
2-66
MH88520-1
Preliminary Information
Ringing
The relay drive circuit switches ringing onto Ring
Feed (Fig. 7). The diode is present to suppress
voltage transients during relay switching caused by
the inductive coils of the relay. Ringing voltage
included ac ringing (90V
RMS
typically) and DC line
feed voltage (-24V typically).
Line Feed/Ring Feed Circuit
The line feed circuit provides loop current and the
ability to apply ringing onto Tip and Ring. The
impedance from Ring Feed to GND is 600
dc
(although for ac it is optimised for a German complex
impedance) which gives the loop current as:
Voltage at Ring Feed pin
Telephone Impedance + 600
Amps
The positive supply for the line feed circuit is VDD
though the loop current is determined from Ring
Feed and GND.
Line Impedance
The MH88520-1’s Tip-Ring (Zin) impedance is fixed
at the German complex impedance. For correct SLIC
impedance, JUNC must be appropriately terminated.
See AC Electrical Characteristics.
Transmit and Receive Gain
Transmit Gain (JUNC to Tip-Ring) and Receive Gain
(Tip-Ring to JUNC) are fixed (See AC Electrical
Characteristics). For correct gain, the SLIC input
impedance must match theline impedance and
JUNC must be appropriately terminated.
Digital Applications
The 2-wire junctor output can be converted to a
4-wire circuit using the MH88524 (2-4 wire
converter). This 4 wire circuit can be interfaced to a
filter/codec to use in digital voice switched systems.
Alternatively the MH88600/MH88612, digital ONS
SLIC can be used.
Figure 4 - Return Loss VS Junctor Load Impedance
10
20
30
40
50
60
550
600
650
700
750
800
850
900
950
TYPICAL
RETURN
LOSS
(dB)
LOAD IMPEDANCE ON JUNCTOR (
)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MH88524 | Dual 2-4 Wire Circuit(雙2-4線電路（在4線設(shè)備和話音開關(guān)之間提供兩個(gè)接口）) |
| MH88524 | Dual 2-4 Wire Circuit Preliminary Information |
| MH88600 | Global SLIC Preliminary Information |
| MH88610 | Subscriber Line Interface Circuit (SLIC) Preliminary Information |
| MH88612BV-K | Subscriber Line Interface Circuit (SLIC)(混合用戶線接口電路（SLIC）) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MH88524 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Dual 2-4 Wire Circuit Preliminary Information |
| MH88600 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Global SLIC Preliminary Information |
| MH88610 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Subscriber Line Interface Circuit (SLIC) Preliminary Information |
| MH88612 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Subscriber Line Interface Circuit (SLIC) Preliminary Information |
| MH88612B | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Subscriber Line Interface Circuit (SLIC) |
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