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SM8221 Datasheet(PDF) 6 Page - Nippon Precision Circuits Inc

Part # SM8221
Description  Calling Number Identification Receiver IC
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Manufacturer  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM8221 Datasheet(HTML) 6 Page - Nippon Precision Circuits Inc

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NIPPON PRECISION CIRCUITS-6
SM8220/SM8221
FUNCTIONAL DESCRIPTION
Bell 202
ITU-T V.23
Modulation Type
Continuous - phase binary frequency shift keying (FSK)
Logical 1 (Mark)
1200 ± 12Hz
1300 ± 22Hz
Logical 0 (Space)
2200 ± 22Hz
2100 ± 22Hz
Carrier Frequency
1700Hz
1700Hz
Transmission rate
1200BPS
1200BPS
Data format
serial, asynchronous
serial, asynchronous
The SM8220/SM8221 Calling Number Identification
Receiver IC is a device compatible with the Bellcore GR-
30-CORE for transmitting asynchronous voice-band data
to Customer Premises Equipment (CPE) from a serving
Stored Program Controlled Switching System (SPCS) or a
Central Office (CO). This data transmission technique is
applicable in a variety of services such as Calling Number
Delivery (CND), Calling Name Delivery (CNAM). With
these services, a subscriber will have the ability to display a
message containing the phone number of the calling party,
the name of a calling party, the date and the time.
The data signaling interface should conform to Bell 202 and ITU-T V.23 specification, which is:
101010...
1
Data
1st Ring
2nd Ring
Channel
Seizure
Signal
Mark
Signal
*
Message
Type
Word
Message
Length
Word
Message
Words
*
Checksum
Word
*
*: Mark bits
Single
Message
Format
101010...
1
Data
1st Ring
2nd Ring
Channel
Seizure
Signal
Mark
Signal
*
Message
Type
Word
Message
Length
Word
*
Multi
Message
Format
*
Parameter
Type
Word
Parameter
Length
Word
*
Parameter
Words
Checksum
Word
*
Parameter
Type
Word
Parameter
Length
Word
*
*
*
*
Parameter
Type
Word
Parameter
Length
Word
*
*
Parameter
Words
Parameter
Words
*: Mark bits
Bellcore GR-30-CORE Data Format


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