cx20493-35/app Conexant Systems, Inc., cx20493-35/app Datasheet - Page 24

• Manufacturer Part Number: cx20493-35/app
• Description: With Cx20493 Smartdaa?
• Manufacturer: Conexant Systems, Inc.

2.4
2.4.1
2.4.2
2.4.3
2.4.4
2.4.5
2.4.6
2-4
CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet
Data Mode
Speed Buffering (Normal Mode)
Flow Control
Escape Sequence Detection
BREAK Detection
Telephone Line Monitoring
Fall Forward/Fallback (V.92/V.90/V.34/V.32 bis/V.32)
The modem enters data mode when a telephone line connection has been established
between modems and all handshaking has been completed.
Speed buffering allows a DTE to send data to, and receive data from, a modem at a speed
different than the line speed. The modem supports speed buffering at all line speeds.
DTE-to-Modem Flow Control. If the modem-to-line speed is less than the DTE-to-
modem speed, the modem supports XOFF/XON or RTS/CTS flow control with the DTE
to ensure data integrity.
The +++ escape sequence can be used to return control to the command mode from the
data mode. Escape sequence detection is disabled by an S2 Register value greater than
127.
The modem can detect a BREAK signal from either the DTE or the remote modem. The
\Kn command determines the modem response to a received BREAK signal.
GSTN Cleardown (V.90, V.34, V.32 bis, V.32). Upon receiving GSTN Cleardown from
the remote modem in a non-error correcting mode, the modem cleanly terminates the call.
Loss of Carrier (V.22 bis and Below). If carrier is lost for a time greater than specified
by the S10 register, the modem disconnects.
During initial handshake, the modem will fallback to the optimal line connection within
V.92/V.90/V.34/V.32 bis/V.32 mode depending upon signal quality if automode is
enabled by the +MS or N1 command.
When connected in V.92/V.90/V.34/V.32 bis/V.32 mode, the modem will fall forward or
fallback to the optimal line speed within the current modulation depending upon signal
quality if fall forward/fallback is enabled by the %E2 command.
Conexant
102247B