sm8220 Nippon Precision Circuits Inc, (NPC), sm8220 Datasheet - Page 6

• Manufacturer Part Number: sm8220
• Description: Calling Number Identification Receiver Ic
• Manufacturer: Nippon Precision Circuits Inc, (NPC)

FUNCTIONAL DESCRIPTION
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
Message
Message
Format
Format
Single
Multi
The SM8220/SM8221 Calling Number Identification
The data signaling interface should conform to Bell 202 and ITU-T V.23 specification, which is:
Bellcore GR-30-CORE Data Format
Parameter
Word
Type
Channel
Channel
Seizure
Seizure
Signal
Signal
Carrier Frequency
Modulation Type
Transmission rate
Logical 0 (Space)
Logical 1 (Mark)
Data format
*
1st Ring
1st Ring
Parameter
Length
Word
Signal
Signal
Mark
Mark
*
Message
Message
Word
Word
Type
Type
DISCONTINUED
*
*
101010...
101010...
Parameter
Words
Message
Message
Length
Length
SM8220/SM8221
Word
Word
serial, asynchronous
Continuous - phase binary frequency shift keying (FSK)
PRODUCT
1200 ± 12Hz
2200 ± 22Hz
1200BPS
Bell 202
1700Hz
1
1
*
*
Parameter
Word
Type
*
Data
Data
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.
*
Message
Words
Parameter
Parameter
Length
Word
Word
Type
*
*
Parameter
Length
Word
serial, asynchronous
*
*: Mark bits
NIPPON PRECISION CIRCUITS-6
1300 ± 22Hz
2100 ± 22Hz
ITU-T V.23
Checksum
*
1200BPS
Word
Parameter
1700Hz
Words
2nd Ring
2nd Ring
Parameter
Words
*
*
*: Mark bits
Checksum
Word