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HIGH SPEED INTERNET MODEM FAMILY 

 

 CH2124 

Send/Retrieve 

Email.  2 I/O Ports 2400bps. 

 CH2160 

Send/Retrieve 

Email.  2 I/O Ports, V.90. 

 

 

2005 Cermetek Microelectronics, Inc. 

Page 1 

Document No. 607-0017 Revision I1 (05/05)

 

FEATURES 

  Replaces conventional modems using the world 

wide web for communication. 

  Transparent internet operations of Point-to-Point 

Protocol (PPP), Password Authentication Protocol 
(PAP) and Challenge Authentication Protocol 
(CHAP) to connect to the Internet. 

  Built-in TCP/IP and SMTP to send emails, TCP/IP 

and POP3 to retrieve and/or delete emails. 

  On Demand and I/O pin event driven email 

transmission and retrieval. 

 Send/Retrieve 

email. 

  Retrieve select individual message. 

  Programmable using serial interface. 

  Remote programming using PSTN. 

  Resident modem supports: V.90, V.34bis, V.34, 

V.22bis, V.22A/B V.23, V.21, Bell 212A and 103, 
(depending on model) and can be used in 
conventional modem mode. 

  Error correcting: V.42 LAPM, MNP 2-4 and MNP10 

(CH2160). 

  Automatic baud rate adaptability utilizing speed 

sensing, flow control and data buffers. 

  Serial interface, V.24 (EIA 232-E), 5 volts. 

  NVRAM for stored modem (S-Registers) profiles. 

 Cermetek 

@T

®

 AT-like Commands. 

  Built-in DAA with 1500 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/Industry Canada CS-03 Part 

I approvable. 

  Pin-for-Pin compatible family. 

  +5 Volt operation. 

  Small size: 1.35” x 1.97” x 0.55” (nominal). 

  Low Cost 2400bps version (CH2124). 

  Use with any Non-proprietary commercial or private 

ISP. 

 Cermetek’s 

iModem Network

 ISP has 1000s of 

local access numbers world wide. 

  Failsafe back up 1-800 access number, auxiliary 

and alternative telephone numbers available. 

  1 year free trial subscription to 

iModem Network

 

ISP provided with each iModem. 

 iNetWizard

®

 Windows based programming aid 

available free-of-change. 

INTRODUCTION 

Direct machine-to-machine interaction represents the 
next logical extension of the internet.  Cermetek internet 
modem (iModem) products are designed to exploit the 
internet to facilitate the utilization of machine-to-
machine interactions.  Using email, information can 
easily be transferred between systems and can be 
transmitted/retrieved at will.  Internet email provides low 
cost, near real time multi-path communication. 

 

Replacing conventional modems and long distance 
telephone lines with local access internet connections 
reduces fixed asset and maintenance costs, limits 
communication expenses and saves money. 
 
 

USER FRIENDLY INTERFACE LAYER 

All Cermetek iModem products contain a user friendly 
interface layer that provides the user transparent 
access to the internet.  This interface layer, consisting 
of various 

@T

®

 macro commands, has the look and feel 

of conventional modem AT commands.  With the 

@T

®

 

macro commands the user can direct the iModem to 
compose, edit/modify, send, retrieve and delete email 
messages.  Internet and email activity status is reported 
via the iModem’s V.24 (EIA 232-E) serial interface. 
 
The CH2124/60 products are the first generation 
internet enabled devices.  These products excel at 
sending and retrieving modest amounts of data.  Email 
messages of approximately 125 ASCII characters in 
length can be stored in internal Flash ROM for later 
transmission.  Emails of larger length can be retrieved. 
 
The CH2124/60 products are ideal for very low cost 
controller applications and in applications where limited 
data transfer is required.

 

 
 

OVERVIEW OF THE CH21XX iMODEM

 

A conceptual representation of the iModem in an 
embedded environment is presented in Figure 1.  As 
can be seen in this figure, the iModem requires the 
input of various internet parameters to function properly: 
user name, user ID, user password, ISP telephone 
number, ISP mail server address/name, local email 
address/name, destination email address and user 
specified email message/input port status. 
 
 

Summary of Contents for CH2124

Page 1: ...d available free of change INTRODUCTION Direct machine to machine interaction represents the next logical extension of the internet Cermetek internet modem iModem products are designed to exploit the internet to facilitate the utilization of machine to machine interactions Using email information can easily be transferred between systems and can be transmitted retrieved at will Internet email prov...

Page 2: ...H2124 iModem contains a fully functional 56kbps 2400bps modem and the hardware and firmware needed to provide the internet capability Because of the unique architecture of Cermetek iModems these iModems have the ability to operate as either an internet email transceiver or as a high reliability analog modem Additionally the CH2124 60 products support user remote access which can be used to reprogr...

Page 3: ... the idle state if a low going TTL pulse is presented to the SEND Email Control Pin Pin 6 at any time during or after initiation of email send Semi Autonomous Control This method requires a minimal amount of host processor intervention and requires that the DTE serial port be operational Semi autonomous control is a special case of full Host Supervised Control and relies on the preprogrammed defau...

Page 4: ...nds an ASCII MESSAGE ACCEPTED activity response message and sends a TTL LOW Pulse to Pin 8 indicating that the ISP Mail Server has accepted the email message Control of the internet capabilities of the iModem can be either event driven or initiated and controlled by a system level host processor Refer to Table 3 for a complete set of pin descriptions When not utilized in the internet connectivity ...

Page 5: ...on with the internal µP controller Refer to Application Note 158 Cermetek iModem Caveats and Definitions for a more detailed discussion of this issue IMPORTANT NOTE Cermetek recommends a minimum of 50ms inter character delay when sending commands to the CH2124 60 iModem Failure to do so could result in unpredictable performance Refer to Cermetek s High Speed Modem and FAX Family product data sheet...

Page 6: ...ware versions 1 262 or greater T J 1 1 2 7 12 Establish email message type to be sent when iModem SEND pin is activated or the TD command issued J1 will select the User Defined message or by K8 parameter for firmware versions 1 262 or greater T K0 n 1 2 6 Select PAP Authentication Protocol n 01 allows PAP only DEFAULT n 7D allows CHAP or PAP CHAP NOT SUPPORTED T K1 n 1 2 6 Set the number of dial u...

Page 7: ...is currently limited to 125 ASCII characters Blanks or spaces are allowed and count as 1 character per each occurrence The entered message is stored in message memory location M1 T N1 n 1 2 Enter local access phone number for ISP n T OP1 n 1 2 Enter POP3 server IP HEXIDECIMAL address n T OS1 n 1 2 Enter SMTP server IP HEXIDECIMAL address n T PW n 1 2 Enter Dialup Password Maximum length is 15 alph...

Page 8: ...5 Parameter must be specified as one ASCII alphanumeric character 6 Parameter must be specified as two alphanumeric characters Use a leading 0 if necessary 7 Effective with iModem Firmware Revisions 1 262 or greater the TJ0 and TJ1 commands have been replaced with K8 parameter modifiable with the TK8 command 8 Dial up Unix Shell account access is NOT currently supported on the iModem Network ISP 9...

Page 9: ...curs after successful email transmission and after receipt of MESSAGE ACCEPT status from ISP SMTP mail server MESSAGE DELETED 1 Occurs after successful deletion of specified message number s NO CONNECT 1 Occurs when PSTN line is released after unsuccessful dialup and or unsuccessful ISP negotiation and or unsuccessful SMTP server negotiation NO DIALTONE 1 Occurs after unsuccessful dialup and iMode...

Page 10: ...y User Defined email message TN1 Display local access POP phone number TOP1 Display POP3 server IP address TOS1 Display SMTP server IP address TPW Display Dial up password TPM Display POP3 password TP1 Display ISP password TS1 Display email subject TU1 Display email recipient TO name Commands To Interrogate iModem Command Function TI Display iModem product type and firmware revision TV Displays IS...

Page 11: ...rovable for use by DOT to Industry Canada CS 03 Part I However per Canadian procedures approval can only be granted after the iModem has been installed into the end product Typically Canadian approval is obtained by submitting the final end product to an independent test house or consultant for evaluation The test house consultant then forwards the test results and applicable documents to the regu...

Page 12: ...o the users or the operation of the user s equipment the telephone company will give the user notice in writing to allow the users to make any changes necessary to maintain uninterrupted service In certain circumstances it may be necessary for the telephone company to request information from the users concerning the equipment which the user has connected to the telephone line Upon request of the ...

Page 13: ...nary 1 condition is indicated by a HIGH 11 RXD O RECEIVE DATA Serial Receive data output Received marking or a binary 1 condition is indicated by a HIGH 12 NC NO CONECTION 13 DTR I DATA TERMINAL READY INPUT Active LOW Switching off DTR can either return modem to command state disconnect phone call or reset modem DTR should be set LOW when not in use 14 DSR O DATA SET READY LOW indicates handshakin...

Page 14: ...o verify compliance For Canada use either 10Ω resistors carbon film or SMD parts 1 8 watt minimum as described in paragraph B above 2 Over Voltage and Lightning Protection A Surge Protection is provided by internal circuitry see Figure 3 No additional external components are required to maintain conveyed FCC Part 68 approval B In most environments 2 terminal surge suppressors are adequate For seve...

Page 15: ...roducts Model Summary of Features Operating Temperature CH2124 2 Input Sense Pins Send and Retrieve Emails Email Send Control Pin Full Function V 22bis 2400bps FCC Part 68 Approved UL1950 listed 0 C to 70 C CH2160 2 Input Sense Pins Send and Retrieve Email Email Send Control Pin Full Function V 90 56Kbps FCC Part 68 Approved UL 1950 listed 0 C to 70 C Figure 4 Example Circuit for illumination of E...

Page 16: ...nput Current RST 580 uA CP Capacitive Load TXD DTR RTS Capacitive Load RTS 10 8 pF pF Table 6B CH2160 iModem Electrical Specifications Symbol Characteristic Min Typ Max Units VCC Positive Supply Voltage 4 5 5 0 5 5 V ICC Off Hook Nominal Operating Current VCC 5 5V when modem is Off Hook 120 0 mA VIH High Level Input Voltage 5 0V 2 0 3 5 V VIL Low Level Input Voltage 5 0V 1 0 2 2 V VT Positive Hyst...

Page 17: ...lse 10 msec If user supplied Note 1 All CH2124 iModem devices perform an internal self check upon reset and will not respond to commands issued during this self check sequence Table 7B CH2160 iModem Electrical Specifications Parameter Minimum Typical Maximum Units Comments Off Hook Impedance 20 Mohm Trans Hybrid Loss 25 dB 600 Ohm RXA TXA Ring Voltage Loop 35 VPP On 48VDC line voltage for sustaine...

Page 18: ...e or for any infringements of patents or other rights of third parties resulting from its use No license is granted under any patents or patent rights of Cermetek Cermetek provides the user with a FCC USA and IC Canada Approved or Approvable device However Cermetek does not have influence over nor knowledge of the specific user application environment Therefore for FCC and IC Approved or Approvabl...

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