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參數資料
| 型號： | MH88610 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | () |
| 中文描述： | （） |
| 文件頁數： | 1/17頁 |
| 文件大小： | 168K |
| 代理商： | MH88610 |
A-149
Table of Contents
1.0
Introduction
2.0
MT8960-67 Voice Codec General
Application Information
3.0
MT8960-67 Functional Description
and Application Details
3.1 Channel Timeslot Assignment
3.2 Switching and Control Using the
MT8980 Digital Crosspoint Switch
4.0
Subscriber Line Interface Circuit
Applications
5.0
MH88610 Application Details
5.1 Battery Feed
5.2 Off-Hook Detection and Dial Pulse
Signalling
5.3 Application of Ringing and Automatic
Ring Trip Implementation
5.4 Transmit and Receive Signal Levels
6.0
Consideration of Loss and Level
Plans in SLIC Design
7.0
Line Card Power Supply Filtering
and Codec Circuit Protection
8.0
Line Card Layout Guidelines
9.0
Conclusions
10.0 References
1.0 Introduction
In digital telephone switching systems, the two wire
analog loops interface to the switch through a
Subscriber Line Interface Circuit (SLIC). The basic
functions of the SLIC are frequently summarized
using the acronym BORSCHT - which stands for
Battery, Overvoltage, Ringing, Signalling, Coding,
Hybrid and Test. Mitel’s MH88610 Subscriber Line
Interface Circuit (SLIC) and the MT8960-67 series of
Voice Codecs can be used together to implement
these functions.
The MT8960-67 series of Voice Codecs integrate all
the functionality necessary to encode analog signals
in the voice band into a digital format using Pulse
Code Modulation (PCM). The encoded signal can be
readily handled by digital time-space crosspoint
switches and digital transmission interfaces. The
codecs also perform the converse function of
decoding PCM back into an analog format. The
MH88610 is a thick film hybrid circuit which can be
used to implement the remaining BORSCHT
functions mentioned previously.
This application note provides details on how the
Mitel MT8960-67 series of Voice Codecs can be
used in conjunction with the MH88610 to implement
a complete subscriber line interface for a digital PBX.
A general discussion on loss and level plans has
been included to highlight how some of the features
incorporated in the codecs facilitate design of
switching systems. Guidelines on low noise line card
design and codec protection have also been
presented.
2.0 MT8960-67 Voice Codec General
Application Information
The MT8960-67 (MT896X) series of voice codecs
integrate all the functions necessary to convert
analog voice signals to PCM and PCM back to
analog. The devices meet CCITT and AT&T codec
standards for primary rate interface. The MT8960-67
series of codecs are optimized for use in line card
type applications and therefore incorporate several
features not generally seen in other devices with
similar functionality including software program-
mable gain pads, uncommitted drive outputs and a
number of loopback and test modes.
ISSUE 3
June 1995
MSAN-131
Subscriber Line Interface for
Digital Switching Systems
Application Note
相關PDF資料 |
PDF描述 |
|---|---|
| MH88617 | Programmable SLIC with Ringing Amplification(帶振鈴放大作用的可編程用戶線接口電路（SLIC）) |
| MH88622-3 | DUAL OPS SLIC Preliminary Information |
| MH88622-5 | DUAL OPS SLIC Preliminary Information |
| MH88622 | DUAL OPS SLIC Preliminary Information |
| MH88622-1 | DUAL OPS SLIC Preliminary Information |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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) |
| MH88612BV-2 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Subscriber Line Interface Circuit (SLIC) |
| MH88612BV-K | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Subscriber Line Interface Circuit (SLIC) Advance Information |
| MH88612C | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Subscriber Line Interface Circuit Preliminary Information |
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