參數(shù)資料
型號(hào)： T8531
廠商： Lineage Power
英文描述： Tone Processing(音調(diào)處理器件)
中文描述： 音處理（音調(diào)處理器件）
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 338K
代理商： T8531
8
Lucent Technologies Inc.
User Manual
September 2000
T8531 and T8531A Tone Processing
Caller ID Generation
Overview
Calling number delivery (CND), better known as caller ID, is a telephone service intended for residential and busi-
ness customers. It allows the called customer premises equipment (CPE) to receive a calling party’s directory num-
ber and the date and time of the call during the first 4 second silent interval in the ringing cycle.
Figure 4 shows the the caller ID signaling generated by the T8531. This signaling format is listed in time sequence.
The protocol uses words that are 8-bit data bytes. During transmission, each byte is preceded by a start bit and fol-
lowed by a stop bit. The bytes are sent in the order of least significant bit first.
Caller ID information is entered using the control words listed in Table 6. Caller ID operation can be modified, as
required, by using the control words listed in Table 7. Table 7 also lists all the operational default values.
Note that the caller ID signal passes through the receive path relative gain block (Figure 2). Signal magnitude must
be adjusted to compensate for any relative gain setting.
Figure 4. Caller ID Frame Format
←
1 Byte (8 bits)
→
Channel Seizure Signal
→
T
The channel seizure is 300 altering bits of 0 and 1 providing a detectable
alternating function to the CPE.
Carrier Signal
The carrier signal consists of 180 mark bits to condition the receiver for data.
Message Type Word
The message type word indicates the service and capability associated with
the data message. The message type word for CND is 0x04.
The message length word specifies the total number of data words to follow.
The data words are encoded as ASCII and represent the following informa-
tion:
Message Length Word
Data Words
I
The first two words represent the month.
I
The next two words represent the day of the month.
I
The next two words represent the hour in local military time.
I
The next two words represent the minute after the hour.
I
The calling party’s directory number is represented by the remaining
words in the data word field.
The checksum word contains the two’s complement of the modulo-256 sum
of the other words in the data message (i.e., message type, message length,
and data words). The receiving equipment calculates the modulo-256 sum
of the received words and adds this sum to the received checksum word. A
result of zero indicates that the message was correctly received.
Checksum Word
相關(guān)PDF資料
PDF描述
T8531A Tone Processing(音調(diào)處理器件)
T8532 Multichannel Programmable Codec Chip Set(多通道可編程編解碼器芯片組)
T8534 Quad Programmable Line Card Signal Processor(四通道可編程線卡信號(hào)處理器)
T8533 Quad Programmable Line Card Signal Processor(四通道可編程線卡信號(hào)處理器)
T8535A Quad Programmable Codec Chip Set(四通道可編程編解碼器芯片組)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T8531A 制造商:AGERE 制造商全稱(chēng):AGERE 功能描述:T8531A/8532 Multichannel Programmable Codec Chip Set
T8532 制造商:AGERE 制造商全稱(chēng):AGERE 功能描述:T8531A/8532 Multichannel Programmable Codec Chip Set
T8533 制造商:AGERE 制造商全稱(chēng):AGERE 功能描述:T8533/34 Quad Programmable Line Card Signal Processor
T85331G 制造商:BITECH 制造商全稱(chēng):Bi technologies 功能描述:Thick Film Super Low Profile SIP Resistor Networks
T85331J 制造商:BITECH 制造商全稱(chēng):Bi technologies 功能描述:Thick Film Super Low Profile SIP Resistor Networks
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