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AN93
10 Rev. 1.3
Table 3. Carriers and Tones
Specification Transmit Carrier
(Hz)
Receive Carrier
(Hz)
Answer
Tone (Hz)
Carrier Detect (Acquire/
Release)
V.92 Variable Variable per ITU-T V.92
V.90 Variable Variable per ITU-T V.90
V.34 Variable Variable per ITU-T V.34
V.32bis 1800 1800 2100 per ITU-T V.32bis
V.32 1800 1800 2100 per ITU-T V.32
V.29 1700 1700 per ITU-T V.29
V.22bis, V.22
Originate/answer
1200
2400
2400
1200
2100 –43 dBm/–48 dBm
–43 dBm/–48 dBm
V.21
Originate/answer (M/S)
1180/980
1850/1650
1850/1650
1180/980
2100 –43 dBm/–48 dBm
–43 dBm/–48 dBm
Bell 212A
Originate/answer
1200
2400
2400
1200
2225 –43 dBm/–48 dBm
–43 dBm/–48 dBm
Bell 103
Originate/answer (M/S)
1270/1070
2225/2025
2225/2025
1270/1070
2225 –43 dBm/–48 dBm
–43 dBm/–48 dBm
Table 4. ISOmodem Capabilities
Part Numbers Package UART EEPROM SPI Parallel SSI/Voice
Si2493/57/34/15/04
1
SOIC-16
Si2493/57/34/15/04
1
TSSOP-24
2
Si2494/39
QFN-38
Notes:
1. Die Revision D or later
2. The EEPROM interface option is available only when the UART or SPI interface is selected.