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PDF 73D2248A Data sheet ( Hoja de datos )
| Número de pieza | 73D2248A | |
| Descripción | (73D2248A / 73D2348A) MNP5 / V.42bis Datacom Modem Device Set | |
| Fabricantes | TDK Electronics | |
| Logotipo |  |
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 1. - Datacom Modem Device Set  Hay una vista previa y un enlace de descarga de 73D2248A (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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DESCRIPTION
The 73D2248A/2348A Device Sets consists of two
CMOS integrated circuits which provide the data
pump and protocol functions required to implement a
high performance 2400 bit/s modem with error
control and data compression. The 73D2248A basic
modem function is provided by the 73K224L modem
chip and is compatible with CCITT V.21, V.22,
V.22bis and Bell 103 and 212A protocols. The error
control functions are provided by modular software
running in the 73M2910 controller. Modules are
available for MNP4, and V.42. Compression
software modules can be added to the controller;
MNP5 and V.42bis are available. Provisions for
customization of the command set are provided,
forming the basis for an international modem.
The 73D2348 differs from the 73D2248A in that it
uses the 73K324L instead of the 73K224L for the
data pump. The 73K324L replaces the Bell 103, 300
bps (bit/s) FSK mode of operation, with the CCITT
V.23, 1200 bps (bit/s) FSK mode. The software is
also modified to support V.23. The two products are
otherwise identical.
73D2248A/2348A
MNP5, V.42bis Datacom
Modem Device Set
FEATURES
April 2000
• Combines modem and protocol controller
• Supports 0 - 300, 1200 and 2400 bit/s with both
sync and async modes
• Modular software design allows customization
• Modem protocols:
• Bell 103 (73K224L), 212A
• CCITT V.21, V.22, V.22bis, V.23 (73K324L)
• Error control/compression protocols Available:
MNP4, MNP5, CCITT V.42, V.42bis
• Supports non-volatile memory to store user
configurations and phone numbers
• CMOS design for low power consumption
MNP5, V.42bis Datacom
Modem Device Set
73M2910L
Controller
8 73K224L/324L
Modem
HYBRID/
DAA
16
STATIC
RAM
32K x 8
16
ROM
64K x 8
TSC 73D2248
NV
RAM
93C66
RECOMMENDED
SUPPORT
1 page  
73D2248A/2348A
MNP5, V.42bis Datacom
Modem Device Set
Dial string arguments:
, = delay
; = return to command
@ = silent answer
s = dial stored number
! = flash
W = wait for tone
R = reverse mode
If the NOVRAM has not been initialized it may be necessary to power down/power up and type AT&F&W<cr> to
properly initialize modem state.
TABLE 1: Result Codes
Xn VERBOSE/NUMERIC RESULT CODES
X0 OK/0, CONNECT/1, RING/2, NO CARRIER/3, ERROR/4
X1 All functions of X0 + CONNECT (RATE)/1 = 300, 5 = 1200, 10 = 2400
X2 All functions of X1 + NO DIAL TONE/6
X3 All functions of X1 + BUSY/7
X4 All functions of X3 + NO DIAL TONE/6, NO ANSWER/8
TABLE 2: S Registers Supported
Sn FUNCTION
UNITS
S01 Answer on ring
S1 Ring counter
No. of rings on which to answer
No. of rings accumulated
S2 Escape code
ASCII CHR Decimal 0-127
S3 Carriage return
S4 Line feed
ASCII CHR Decimal 0-127
ASCII CHR Decimal 0-127
S5 Back space
ASCII CHR
S6 Wait for dial tone
S7 Wait for carrier
Seconds
Seconds
S8 Pause time
Seconds
S9 Carrier valid
S10 Carrier drop out
100 milliseconds (0.1 sec)
100 milliseconds (0.1 sec)
S11 DTMF tone duration
1 millisecond (0.001 sec)
S12 Escape guard time
S13 Unused
20 milliseconds (0.05 sec)
*S141
Bit mapped register
Decimal 0-255
S15 Unused
1 Stored in NVRAM with &W command.
2 Modem will not answer until value is changed to 1 or greater.
DEFAULT
0002
000
043
013
010
008
002
030
002
006
014
070
050
N/A
170
N/A
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet 73D2248A.PDF ] | |
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