參數(shù)資料
型號(hào)： T7237
廠商： Lineage Power
英文描述： ISDN Transceiver(ISDN收發(fā)器)
中文描述： 綜合業(yè)務(wù)數(shù)字網(wǎng)收發(fā)器（綜合業(yè)務(wù)數(shù)字網(wǎng)收發(fā)器）
文件頁(yè)數(shù)： 4/36頁(yè)
文件大?。?/td> 697K
代理商： T7237
SCNT1 Family Reference Design Board
Hardware User’s Manual
Manual
May 1996
2
Lucent Technologies Inc.
Introduction
This document describes the installation and use of the SCNT1 Family Reference Design Board (SCNT1-RDB).
The SCNT1-RDB is a printed-circuit board that provides an example implementation of an ISDN NT1 circuit based
on the Lucent Technologies T7256 or T7234. In addition, it can be configured as an ISDN terminal adapter (TA)
based on the Lucent Technologies T7237. With the T7234 or T7256 installed, it is a fully functional NT1, with the
exception of power status monitoring circuitry (which can be added by the user). It can be used as an evaluation
platform as well as a reference design. With the T7237 installed, it can be used to develop U-interface terminal
adapter applications (external control hardware is required in this case). When the T7237 is installed, the S/T-inter-
face circuitry of the SCNT1-RDB is not used. For instructions on board operation, go directly to the Board Setup
and Operation section. A block diagram of the SCNT1-RDB is shown below in Figure 1.
Figure 1. SCNT1-RDB Block Diagram
G
(
FADS ADAPTER
INTERFACE
(30-PIN CONNECTOR)
TDM, SERIAL μP I/O
T7234/
T7237/
T7256
LH1465AB
dc TERMINATION
& OPTOISOLATOR
EPLD
TRANSFORMER,
RESISTORS, &
PROTECTION
RJ-45
TRANSFORMER,
RESISTORS, &
PROTECTION
RJ-45
U-INTERFACE
S/T-INTERFACE
5-4654(F)
Description
Overview
Figures 2 and 3 show the board component placement
for the top and bottom sides of the board, respectively.
The major sections of the board are identified in
Figure 2. Figures 4—6 are the board schematics.
Figure 4 contains the following circuits: U-interface,
MLT circuit, status LED, POR circuit, access to power
status leads, and fixed/adaptive timing control for the
S/T-interface. Figure 5 contains the S/T-interface cir-
cuitry. Figure 6 contains the prototyping EPLD, the
FADS adapter interface, the general-purpose interface,
and the external power connection.
Table 1 shows the bill of materials for the board. With
the T7256 or T7234 installed, the board can be oper-
ated as a stand-alone NT1 by simply connecting the U-
and S/T-interfaces to the appropriate point in the ISDN
network and applying +5 V power at connector J5. The
board can also be operated in enhanced (NT1+) and
terminal adapter (TA) modes when using the T7256.
In NT1+ mode, the board connects to the U- and S/T-
interfaces plus local terminal adapter data or POTS
ports. TA mode is similar to NT1+ mode, except that
the S/T-interface is not used. Both of these modes
require external controllers and TA circuitry that con-
nect via the general-purpose interface (J3) or the FADS
adapter interface (J4). With the T7237 installed, the
board is always operated in the TA mode.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T7237A 制造商:AGERE 制造商全稱:AGERE 功能描述:Compliance with the New ETSI PSD Requirement
T7240 制造商:TE Connectivity 功能描述:
T7-241A5 功能描述:撥動(dòng)開(kāi)關(guān) ON NONE OFF 2 Pole Standard Bat Handle RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開(kāi)關(guān)功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類(lèi)型: 安裝風(fēng)格: 端子密封: 觸點(diǎn)電鍍: 照明:
T7-241B1 制造商:OTTO 功能描述:Toggle Switches ON NONE ON 2 Pole Standard Bat Handle 制造商:OTTO Engineering Inc 功能描述:Switch Toggle ON None ON DPDT Bat Toggle PC Pins 16A 115VAC 28VDC PC Mount with Threads
T7-241B5 功能描述:撥動(dòng)開(kāi)關(guān) ON NONE ON 2 Pole Standard Bat Handle RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開(kāi)關(guān)功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類(lèi)型: 安裝風(fēng)格: 端子密封: 觸點(diǎn)電鍍: 照明:
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