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| 型號(hào)： | D6571E |
| 廠(chǎng)商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Chip for an All-Digital Telephone Answering Machine with Flash Memory Interface |
| 中文描述： | 芯片的全數(shù)字電話(huà)應(yīng)答機(jī)與快閃記憶體介面 |
| 文件頁(yè)數(shù)： | 10/117頁(yè) |
| 文件大小： | 551K |
| 代理商： | D6571E |
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D6571E Data Sheet
DS6571E.2
DSP GROUP, INC., 3120 SCOTT BOULEVARD
SANTA CLARA, CA 95054 PH: 408 986-4300 FAX: 408 986-4490
10
playback may be resumed from the same point.
Normally, during playback, the status word will contain
information about the line signals and the playback
status and will notify the HOST when the end of
message is reached.
Message Deletion
The D6571E allows selective deletion of any
prerecorded message from memory. After each deletion
the message directory is updated accordingly. Message
deletion does not free the memory space. Memory is
freed by using the “Garbage Collection” command.
Message Time Stamp
The HOST may attach two 16-bit data words to each of
the 128 messages of the D6571E. This data can be used
for time/date stamping the recorded message and any
other information defined by the Host. Time Stamp can
be modified after message has been recorded.
Volume Control
The D6571E allows control of the signal that is playing
to the CODEC. This function affects the level of the
played back signal in the Message Playback and Voice
Prompt modes, as well as the level of the looped back
signal in the Record and Line Monitor modes.
Tone Generation
Single and double tone signals can be generated by
D6571E. There are 32 locations provided in the tone
table. No Tone and 12 standard DTMF tones are
predefined and other telephony tones may be added to
the table one time. The HOST can program tones into
any of the 19 remaining entries in this table. The levels
and frequencies are programmable and controlled by
HOST. During tone generation the D6571E monitors the
line.
In case of “cold start” the D6571E can generate No
Tone and 16 preprogrammed standard DTMF tones.
See mode description for details.
DTMF Detection
DTMF detection is implemented by the D6571E in
software. This function may be used for remote
operation of the answering device. The identification
code of detected DTMF signals is transmitted to the
HOST for further processing. Host selects whether the
D6571E reports detection of the 12 DTMF tones or 16
DTMF tones.
Call Progress Tone (CPT) Detection
The D6571E monitors the line for incoming telephone
line signals and detects the presence of call progress
tones in a predefined frequency region. The D6571E
supports call progress tone detection by utilizing a
filter/detector with a bandwidth of 300-640 Hz.
Indication of the presence of call progress tones is
transferred to the HOST, and may be used for
terminating recording.
Caller Identification (CID and CWCID)
The D6571E can monitor and demodulate the FSK
signals that provide CID information from the Central
Office (CO). Both Bell 202 and V.23 demodulation is
supported and the D6571E will automatically adapt to
the FSK modulation provided from the CO.
Caller Alert Signal (CAS) Detection
The D6571E supports detection of the Caller Alert
Signal (CAS) in all functional modes for Call Waiting
CID support. The same signal known as Idle State Tone
Alert Signal is a part of the V.23 protocol.
Sensitivity Control
The
D6571E allows independent control of the
sensitivity of the VOX, DTMF, and Call Progress Tone
(CPT), and CAS detectors.
Speed Dial Telephone Number Storage
The D6571E may store up to 128 telephone numbers,
each with up to 16 digits for dialing. The 1024 bytes of
memory can also be used for any other purpose by the
HOST.
Non-Erasable Storage
The D6571E supports 1600 bytes of a non-erasable
storage.
General Purpose Storage
The D6571E supports up to 16 sectors of a General
Purpose Storage. Each sector allows 3200 bytes of
storage.
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