CH1788 Cermetek Microelectronics, CH1788 Datasheet - Page 9

• Manufacturer Part Number: CH1788
• Manufacturer: Cermetek Microelectronics

Specifications of CH1788

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Cermetek Microelectronics, Inc.
When data transmission is in progress, the CH1788 is
in data mode and will not recognize/respond to AT
commands.
commands when in data mode, the host must send
an escape sequence to the CH1788 forcing the
CH1788 out of data mode and into command mode.
Only then will the CH1788 respond to AT commands.
If the CH1788 is Off-Hook, connected to a remote
modem and placed in command mode by its host, the
CH1788 will not transmit any commands received
from its host to the remote modem. However, when
2006 Cermetek Microelectronics, Inc.
Terse
10
11
12
13
14
22
23
40
41
44
45
46
47
0
1
2
3
4
5
6
7
8
9
To cause the CH1788 to recognize
Table 3.
OK
CONNECT
RING
NO CARRIER
ERROR
CONNECT 1200
NO DIAL TONE
BUSY
NO ANSWER
CONNECT 600
CONNECT 2400
CONNECT 4800
CONNECT 9600
CONNECT 7200
LINE-IN-USE
CONNECT 75/1200
CONNECT 1200/75
CARRIER 300
CARRIER 600
CARRIER 1200/75
CARRIER 75/1200
CARRIER 1200
CARRIER 2400
Summary of Common Result Codes and Meanings.
Verbose
Extended Result Codes
Standard Result Codes
Page 9
in this state, the CH1788 will not receive data from
the remote modem.
Result Codes. After execution of an AT command
and at the completion of each dial attempt, the
CH1788 will deliver a status message on RXD.
Referring to Table 3, the message can be a Terse
(numeric) or Verbose (English) message.
message type is controlled via the V command.
Various combinations of the listed result codes can
be selected with the W and X commands.
Command Executed
Carrier detected at 300bps
Ring Detected
Did not detect carrier
Entry error
Carrier detected at 1200bps
Off-hook, but no response after 5 seconds
Busy signal detected
Remote modem did not answer
Connected, DTE to modem rate- 600bps
Connected, DTE to modem rate- 2400bps
Connected, DTE to modem rate-4800bps
Connected, DTE to modem rate-9600bps
Connected, DTE to modem rate-7200bps
When attempting to go off hook on a busy line
V.23 or Bell 202 – forward/reverse channel
V.23 or Bell 202 – forward /reverse channel
Modem (DCE) connect speed-300bps
Modem (DCE) connect speed-600bps
Modem (DCE) connect speed-1200/75bps
Modem (DCE) connect speed -75/1200bps
Modem (DCE) connect speed-1200bps
Modem (DCE) connect speed-2400bps
CH1788 Surface Mount PLCC 2400bps Modem
Meaning/Description
Document No. 607-0018 Revision A6 (01/06)
The