參數(shù)資料
型號(hào)： MT8870
廠商： Mitel Networks Corporation
英文描述： ()
中文描述： （）
文件頁(yè)數(shù)： 12/23頁(yè)
文件大?。?/td> 177K
代理商： MT8870
MSAN-108
Application Note
A-56
A multi-channel repeater system serving a multitude
of user groups may be found to achieve its most
effective performance in the
"
trunked
"
mode. In this
case, one RF channel is reserved for system
signalling. System operation could be achieved as
follows.
Each mobile plus the repeater system contain a
DTMF receiver, DTMF generator and appropriate
control logic. Mobiles are assigned individual DTMF
I.D. codes and always monitor the signalling channel
when idle. An originating mobile automatically sends
a DTMF sequence containing its own I.D. and the
I.D. of the called party. This is recognized by the
repeater control which retransmits the called party’s
I.D. The answering mobile returns a DTMF
handshake indicating to the repeater control that it is
available to accept a call. At this time the repeater
control sends a DTMF command sequence to both
the originating and answering mobiles which
instructs their logic circuits to switch to a specific,
available channel. If all channels are busy the
repeater control could send DTMF sequences to put
both mobiles on
"
hold
"
and add their I.D.’s to a
"
channel-request
"
queue. This arrangement would
allow users to access any available frequency and
converse privately instead of being restricted to one
assigned channel which is shared among several
user groups.
As well as an individual I.D., each mobile belonging
to a particular organization could also have a
common group I.D. This would allow dispatch
messages to be sent to all company mobiles
simultaneously. Since mobiles would be under
DTMF control, messages could be sent to an
unattended vehicle and, at the user’s convenience,
displayed on a readout .
Each radio link either established or attempted would
result in DTMF I.D. codes being sent to the repeater
control. These occurrences could easily be collected
by a computer for statistical analysis or billing
information. Customers who have defaulted on
rental payments could be denied access to the
system.
Simplified block diagrams of the control systems for
both the repeater and mobiles are shown in Figures
13 and 14 respectively.
Figure 13 - Block Diagram of Control for "Trunked" Repeater System"
REPEATER RECEIVE
AUDIO PATHS
CH5 CH4 CH3 CH2 CH1
REPEATER TRANSMIT
AUDIO PATHS
CH5 CH4 CH3 CH2 CH1
TX
RX
STATION
MONITORS
MT8804
4 x 8
CROSS-
POINT
SWITCH
MT8870
DTMF
RECEIVER
MT5089
DTMF
GENERA-
TOR
TEST/
PROGRAMMING
KEYPAD
AND DISPLAY
CONTROL LOGIC OR
SINGLE CHIP MICROCOMPUTER
TO TELEPHONE
EXCHANGE
PERIPHERAL PORT
HOST COMPUTER,
DATA LOGGER,
ETC
MT8804
4 x 8
CROSS-
POINT
SWITCH
PHONE
PATCH
相關(guān)PDF資料
PDF描述
MT8880C ISO2-CMOS Integrated DTMFTransceiver
MT8880CE-1 ISO2-CMOS Integrated DTMFTransceiver
MT8880CC ISO2-CMOS Integrated DTMFTransceiver
MT8880CE ISO2-CMOS Integrated DTMFTransceiver
MT8880CN ISO2-CMOS Integrated DTMFTransceiver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT8870BE 制造商:Panasonic Industrial Company 功能描述:RECEIVER
MT8870D 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO2-CMOS Integrated DTMF Receiver
MT8870DC 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO2-CMOS Integrated DTMF Receiver
MT8870DC-1 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO2-CMOS Integrated DTMF Receiver
MT8870DE 制造商:Microsemi Corporation 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*