CH224ATF Ver la hoja de datos (PDF) - Cermetek Microelectronics
Número de pieza
componentes Descripción
Fabricante
CH224ATF Datasheet PDF : 13 Pages
| |||
Cermetek Microelectronics, Inc.
CH224ATF Complete 2400 bps Modem Module
Configurati
on
Data Mode
V.22
V.22
Bell 212A
Bell 103
Fax Mode
V.29
V.22
Bell 212A
Bell 103
Notes:
Modulation
QAM
DPSK
DPSK
FSK
QAM
DPSK
DPSK
FSK
Table 1. Configurations and Rates
Transmitter Carrier
Data
Baud
Frequency (Hz) +0.01% Rate (Symbols/
(bps)
Sec.)
Answer Originate
1200
2400
600
2400
1200
1200
600
2400
1200
1200
600
2400
1270 M
300
300
2225
1070 S
2025 S
Receive Transmit
1700
9600
2400
N/A
1700
7200
2400
N/A
1800
4800
1600
1800
1800
2400
1200
1800
1650 M
300
300
1650 M
1850 S
1850 S
Bits Per
Symbol
4
2
2
1
4
3
3
2
1
Legend:
QAM = Quadrature Amplitude Modulation
DPSK = Differential Phase Shift Keying
FSK = Frequency Shift Keying
M = Mark Condition
S = Space Condition
N/A = Not Applicable
Constellation
Points
16
4
4
1
16
8
8
4
1
Command
A/
A
Bn
Cn
Dn
En
F1
Hn
In
Ln
Mn
On
P
Qn
Sn
Sn=v
Sn?
T
Vn
Xn
Yn
Zn
&Cn
&Dn
&F
&Gn
Table 2. “AT” Command Set Summary
Function
Command
Function
Re-execute command
&Jn
Telephone jack control
Answer a call
&L0
Dial-up line operation
Select CCITT or Bell Mode
&M0
Asynchronous mode
Carrier control
&Pn
Pulse dial make/break ratio
Dial modifier
&Q0
Asynchronous mode
Command echo
&Sn
DSR override
On-line character echo option
&Tn
Test and diagnostic
Disconnect (Hangup)
&V
Display current configurations
Identification
&Wn
Store current configuration
Speaker volume
&X0
Asynchronous data transmission
Speaker control
&Yn
Select default profile
Go on-line
&Zn=x
Store dial string to location n
Force pulse dialing
%Dn
DTMF Level Attenuation
Quiet Result codes control
%J
Load Secondary Defaults
Select S register as default
%Ln
Transmit Level Attenuation
Set default S register to value
Dial Modifier
Function
Return the value of S register
P
Pulse Dial
Force DTMF dialing
R
Originate Call in Answer Mode
Report codes form
S=n
Dial Stored Number
Extended result codes
T
Tone Dial
Long space disconnect
W
Wait for Dial Tone
Soft reset and restore profile
;
Return to Idle State
RLSD (DCD) option
@
Wait for Quiet Answer Command
DTR option
!
Flash Hook
Recall (restore)factory profile
,
Pause
Select guard tone
0-9, A, B, C, D, #, Dial Digits/ Characters
*
2001 Cermetek Microelectronics, Inc.
Page 3
Document No. 607-0005 Revision B1 (05/02)
Share Link: 