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参数资料
| 型号： | MH88625 |
| 厂商： | Mitel Networks Corporation |
| 英文描述： | DID(Direct Inward Dial)/OPS SLIC(用于直接拨入线卡的用户线接口电路) |
| 中文描述： | 没有（直接内部拨号）/项目用户接口（用于直接拨入线卡的用户线接口电路） |
| 文件页数： | 10/18页 |
| 文件大小： | 74K |
| 代理商： | MH88625 |
MH88625
Preliminary Information
10
DTMF
DTMF tones may be transmitted and received at the
4-wire port.
DID Operation
For DID operation, the Tip and Ring reversal is
controlled by the REVC pin. A logic level one causes
Tip and Ring to be reversed. This can be controlled
by a Mitel Codec (MT896X) system drive output.
(refer to Figure 9b)
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 MH88625 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 decodes the FSK signal and displays
the calling party’s number.
Loop Length
The MH88625 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
OPS Operation
As shown in the application diagram, Figure 9a, the
ringing voltage, typically 90Vrms 20Hz biased at
V
BAT
, is applied to the subscriber line through an
external relay K1. Enabling of the relay is performed
by applying a logic low level to the relay driver control
input, RGNDC. Figure 9c, shows how balanced
ringing can be accommodated if required.
Central Office Operation
The MH88625 can be configured for ground start
C.O. applications with the addition of Q1, D1 and K2,
as shown in Figure 9c. 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
toll call has been dialled. The Tip/Ring reversal can
indicate a toll diversion signal.
相关PDF资料 |
PDF描述 |
|---|---|
| MH88630 | Central Office Interface (LS/GS) Preliminary Information |
| MH88632 | Central Office Interface Circuit Preliminary Information |
| MH89101 | Passive Line Termination Circuit(无源线终端电路) |
| MH89625C-5 | OPS/DID PCM SLIC Preliminary Information |
| MH89625C-6 | OPS/DID PCM SLIC Preliminary Information |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MH88628 | 制造商:MITEL 制造商全称:Mitel Networks Corporation 功能描述:Central Office SLIC Preliminary Information |
| MH88630 | 制造商:MITEL 制造商全称:Mitel Networks Corporation 功能描述:Central Office Interface (LS/GS) Preliminary Information |
| MH88631 | 制造商:MITEL 制造商全称:Mitel Networks Corporation 功能描述:Central Office Interface (LS/GS) Preliminary Information |
| MH88631-1 | 制造商:MITEL 制造商全称:Mitel Networks Corporation 功能描述:Central Office Interface (LS/GS) Preliminary Information |
| MH88631-2 | 制造商:MITEL 制造商全称:Mitel Networks Corporation 功能描述:Central Office Interface (LS/GS) Preliminary Information |
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