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參數(shù)資料
| 型號： | MH88628 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Central Office SLIC(用于中央辦公線卡的用戶線接口電路) |
| 中文描述： | 中央辦公室用戶接口（用于中央辦公線卡的用戶線接口電路） |
| 文件頁數(shù)： | 12/17頁 |
| 文件大?。?/td> | 91K |
| 代理商： | MH88628 |
2-212
MH88628
Preliminary Information
High Voltage capability
Inherent in the thick-film process is the ability of the
substrate to handle high voltage. The standard Mitel
thick-film process provides dielectric strengths of
greater than 1000VAC or 1500VDC. The thick-film
process allows easy integration of surface mount
components such as the high voltage bi-polar power
transistor line drivers. This allows for simplier, less
elaborate and less expensive protection circuitry
required to handle high voltage transients and fault
conditions caused by lightning, induced voltages and
power line crossings.
On-hook Transmission
The MH88628 provides for on-hook transmission
which supports features such as Automatic Numbers
Identification (ANI). The (ANI) information is a FSK
signal originating from and sent by the C.O. during
the off period of the ringing voltage being sent to the
subscribers set. The signal is present during the off
period between the first and second ring. The
subscribers set decodes the FSK signal and displays
the calling party’s number.
TIP Disable
A relay driver, controlled by SEL1 and SEL2, is
provided to drive a relay which can be used to
disable the TIP line when the MH88628 is used for a
ground start central office interface.
Loop Length
The MH88628 can accommodate loop length of up to
2300
minimum
(including
equipment). This corresponds to approximately 8km
using 26AWG twisted pair or 15km using 24AWG
twisted pair.
the
subscriber
Central Office Operation
The MH88628 can be configured for ground start
C.O. applications with the addition of Q1, D1 and K2,
as shown in Figure 9. Ground start requires control of
the Tip lead to remove battery ground from
subscriber loop. For loop start applications, control of
the Tip lead is not required.
C.O’s perform Tip/Ring reversals to indicate that a
tool call has been dialled. The Tip/ring reversal can
indicate a toll diversion signal.
Internal Ringing Amplifier Operation
The MH88628 offers an on-board ringing amplifier. A
1.5 VRMS, 20Hz signal is amplified internally and
applied to TIP and RING leads in a balanced
configuration. A +120Vdc supply are applied
continuously to the MH88628. The decode signals on
SEL1 and SEL2 enable the ringing signal to the TIP
and RING when required.
Loop Current Setting
Figure 8 - Loop Current Setting
+5V
LCA
LCA
LCA
8a
8b
8c
R
-5V
R
相關PDF資料 |
PDF描述 |
|---|---|
| MH88631-2 | Central Office Interface (LS/GS) Preliminary Information |
| MH88631 | Central Office Interface (LS/GS) Preliminary Information |
| MH88631-1 | Central Office Interface (LS/GS) Preliminary Information |
| MH88632B | Central Office Interface Circuit(用于中央辦公電話線的接口電路（在音頻轉(zhuǎn)換設備和用戶線之間提供一個模擬和信號連接）) |
| MH88632B | Central Office Interface Circuit Preliminary Information |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MH88630 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Central Office Interface (LS/GS) Preliminary Information |
| MH88631 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Central Office Interface (LS/GS) Preliminary Information |
| MH88631-1 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Central Office Interface (LS/GS) Preliminary Information |
| MH88631-2 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Central Office Interface (LS/GS) Preliminary Information |
| MH88632 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Central Office Interface Circuit Preliminary Information |
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