SI2493-C-GT Silicon Laboratories Inc, SI2493-C-GT Datasheet - Page 204

• Manufacturer Part Number: SI2493-C-GT
• Description: IC ISOMODEM SYSTEM-SIDE 24TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2493-C-GT

• Mfg Application Notes: SI2493/57/34/15/04, Appl Note AN93
• Data Format: V.21, V.22, V.23, V.29, V.32, V.34, V.90, V.92, Bell 103, Bell 212A
• Baud Rates: 56k
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AN93
Examples of Line Impairments
DTMF Distorted by Low Line Level
Solutions:
204
Fix phone line.
Lower DTMF level with AT:U46, 0BD0 or AT:U46, 0CF0
Check the line current level with AT:R79 and AT:R6C.
Figure 71. Defective DTMF
Figure 72. Normal DTMF
Rev. 0.9