si2493 Silicon Laboratories, si2493 Datasheet - Page 16

• Manufacturer Part Number: si2493
• Description: V.92 Isomodem With Global Daa
• Manufacturer: Silicon Laboratories

Si2493
16
ITU-T V.90, V.34, V.32/V.32bis are echo canceling protocols that use signal quality as criteria for maintaining con-
nection. They also provide for self-training detection to force disconnect.
Carrier Detect (level for ITU-T V.22bis, V.22, V.21,
Permissive—Switched network
212, 103) in Switched Network
ITU-T V.22, V.22bis/Bell 212A
ITU-T V.22, V.22bis/Bell 212A
Connection Options
Line Equalization
Transmit Carrier
Receive Carrier
Originate mode
Originate mode
Originate mode
Originate mode
Originate mode
Originate mode
DTE Interface
ITU-T V.32bis
Answer mode
Answer mode
Answer mode
ITU-T V.32bis
Answer mode
Answer mode
Answer mode
Output Level
ITU-T V.32
ITU-T V.29
ITU-T V.21
ITU-T V.90
ITU-T V.34
ITU-T V.32
ITU-T V.29
ITU-T V.21
Hysteresis
Bell 103
Bell 103
Item
V.92
V.90
V.34
Table 7. Protocol Characteristics (Continued)
Rev. 1.3
Mark (1650 Hz ±12 Hz) Space (1850 Hz ±12 Hz)
Mark (1070 Hz ±12 Hz) Space (1270 Hz ±12 Hz)
Mark (2025 Hz ±12 Hz) Space (2225 Hz ±12 Hz)
Mark (1650 Hz ±12 Hz) Space (1850 Hz ±12 Hz)
Mark (1650 Hz ±12 Hz) Space (1850 Hz ±12 Hz)
Mark (2025 Hz ±12 Hz) Space (2225 Hz ±12 Hz)
Mark (1070 Hz ±12 Hz) Space (1270 Hz ±12 Hz)
Mark (980 Hz ±12 Hz) Space (1180 Hz ±12 Hz)
EIA/TIA-232-E (ITU-T V.24/V.28/ISO 2110)
Loss of Carrier in ITU-T V.22bis and lower
Acquisition (–43 dBm)
As specified by ITU-T
As specified by ITU-T
As specified by ITU-T
As specified by ITU-T
As specified by ITU-T
Release (–48 dBm)
Automatic Adaptive
–9 dBm maximum
1800 Hz ±0.01%
1800 Hz ±0.01%
1200 Hz ±0.5 Hz
2 dBm minimum
1700 Hz ±1 Hz
2400 Hz ±1 Hz
1800 Hz ±7 Hz
1800 Hz ±7 Hz
1800 Hz ±7 Hz
2400 Hz ±7 Hz
1200 Hz ±7 Hz
Specification