CH2156(2001) Ver la hoja de datos (PDF) - Cermetek Microelectronics
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CH2156 Datasheet PDF : 2 Pages
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Internet Appliance Modem
from Cermetek
Direct machine-to-machine interaction represents the
next logical extension of the internet. Using e-mail,
information can easily be transferred between systems
and can be transmitted/retrieved at will. Internet e-mail
provides low cost, near real time multi-path communi-
cation. Access is as close as the nearest PSTN (Public
Switched Telephone Network) phone line connection.
Cermetek’s Internet Appliance Modems (“IAM”) are
designed to facilitate the utilization of machine-to-
machine interactions via the internet.
After initial setup, the IAM’s machine-to-machine
activities proceed transparently with the level of
control desired by the user. This also includes fully
autonomous (i.e., no human intervention) operation by
relying on the internal intelligence of the Internet
Appliance Modem.
Internet Appliance Modem Summary
Features and Specifications
• Point-to-Point Protocol (PPP) with Password
Authentication Protocol (PAP) to connect to the
Internet.
• TCP/IP and Simple Mail Transfer Protocol (SMTP) to
send e-mail.
• On Demand and event driven e-mail transmission
and retrieval.
• Remote programming using PSTN.
• Supports V.90, V.34bvis, V.34, V.32, V.22bis, V.22A/B,
V.23, V.21, Bell 212A and 103.
• Supports V.870 Synchronous operation.
• Error correcting: V.42 LAMP, MNP 2-4 and MNP10.
• Data Compression: V.42bis and MNP5.
• MNP10 Data throughout enhancement for cellular
operation.
• DTE serial interface with speeds up to 230.4kbps.
• Automotive baud rate adaptability utilizing speed
sensing, flow control and data buffers.
• Send and Receive FAX Class 1, Group 3 supported.
• Serial V.24, 5 volt interface.
• NVRAM directory and stored profiles.
• Standard AT Command structure with extensions.
• Cermetek iNet@T® AT Command extensions.
• Built-in DAA with 2500 VAC RMS isolation 2122V peak
surge protection.
• UL 1950 and CSA C22.2 950 (Third Edition) Listed,
Reference UL File E104957.
• FCC Part 68 Approved/DOT CSA CS-03Part I
Approvable.
• Pin-for-Pin compatible with CH179X / CH2056 HS
Family of modems.
• +5 Volt operation with a zero power option.
• Space saving module format:
1.97"L x 1.40"W x 0.54"H
Operational Overview
Cermetek’s Internet Appliance Modem (“IAM”) Family
is the industry’s first group of self-contained miniature
modules which offer a complete PSTN internet ISP
connectivity solution. Furthermore, the IAM can
operate autonomously without the need for host
processor intervention.
The IAM Family offers a variety of internet communica-
tion features ranging from simple on demand or event
triggered e-mail transmission (CH2156) to full send and
retrieve e-mail (CH2160). Internet communication
control of the IAM is exercised by using one of the
following basic control methods:
1. Fully Autonomous or event driven control requiring
no host processor intervention.
2. Semi-autonomous control, requiring one command
to be issued from the host processor.
3. Complete host intervention and supervision.
When using an implementation scheme utilizing a host
processor, the host controls the IAM by using Cermetek
iNet@T Commands which are extensions of the
standard Hayes AT command set.
SEND EMAIL
CONTROL
INPUT 1
INPUT 2
EMAIL
ACCEPTED
INDICATOR PIN
INPUT
SENSE
AND
OUTPUT
PINS
INTERFACE
CIRCUITRY
RxD
RTS
DCD
DSR
RI
CTS
TxD
DTR
SERIAL
INTERFACE
V.24
BA-232-E
OR
UART
NETWORK
PROTOCOLS
POP3
SMTP
TCP
IP
PPP
µP
32K x 8
FLASH
ROM
V.90 MODEM
MODEM INTERFACE
RST SPK +5V
GND
Figure 1. Internet Appliance Modem Functional Block Diagram
DAA
TIP
RING PSTN
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