CH224ATF_技术文档

PRELIMINARY

CH224ATF

Complete 2400 bps Modem Module

INTRODUCTION

FEATURES

The CH224ATF is a complete FCC Part 68 pre-

approved, 2400 bps full function modem solu-

tion; incorporating an on-board Data Access

Arrangement (DAA) in a small footprint,

socket-able packaging format (2.5” L x 1.0 W x

0.45” H).

·

FCC Part 68 pre-approved

UL1950, 3rd edition listed

1500 Vrms isolation

Complete solution: on-board DAA

Data modes

- CCITT v.22 bis (2400 bps), V.22 (1200 bps)

- Bell 212A (1200 bps) and 103 (300 bps)

This product is specifically designed for use as

direct re-placement for Conexant/Rockwell’s

SocketModemä (serial TTL I/O option, Part

-

Enhanced AT commands

·

Group 3 fax modes

-

V.29 (6900/7200 bps) transmit

V.27 ter (4800/2400 bps) transmit and

receive

No. SF224ATF-H1-D5-A0-P1).

This modem provides a fast and convenient

way to integrate a PSTN connectivity into any

OEM product while utilizing a small portion of

-

V.21 Channel 2 (300 bps) transmit and

receive

·

EIA-578 Service Class 1 commands

V.42/MNP2-4 and V.42 bis/MNP5 support

without additional hardware

Data/fax discriminator and auto answering

Communications software compatible

Serial asynchronous DTE interface

NVRAM interface allows storage of two user

configurations and four 36-digit dial strings

Automatic adaptive/ fixed compromise

equalization

PCB area.

external interfaces:

The CH224ATF requires two

CCITT V.24 serial

a

interface that is routed directly from the UART

or UART interface, and a TIP and RING

interface, which is connected directly to a

conventional RJ-11 jack for the PSTN line

connection. The CH224ATF also has various

indicator and status lines to monitor operations

·

or to establish triggers.

The CH224ATF

modem is controlled by industry standard “AT”

commands and is compatible with available

industry communication software.

·

Programmable sleep mode

Full-duplex data mode test capabilities: Analog

loop, local digital loop, and remote digital loop

Half-duplex fax mode test capabilities

Automatic format/speed sensing

·

The device supports asynchronous operation at

2400 bps, 1200 bps, and 300 bps to both Bell

and CCIT standards. The resident PSTN line

interface is FCC Part 68 approved, and is also

Canadian DOC approveable, and can be

approved in other countries that require

1500VAC RMS isolation.

Low power consumption (typical):

Interface

Operating

Sleep

Serial TTL:

155mW

35mW

·

Single +5VDC power supply

1

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

PART NUMBER ORDERING INFORMATION

Part Number

Description

Data/Fax modem module with TTL serial interface, on-board DAA, 0.310” pins

CH224ATF

Operation

TECHNICAL SPECIFICATIONS

Modem operation is controlled by AT commands

(Table 2), fax service class 1 commands (Table

3), and supporting S registers (Table 4). Result

codes and messages are listed in Table 5.

General

The CH224ATF modem is a full-featured, self-

contained data/fax solution. External micro-

controller for data or fax control functions are fully

supported and controlled through the AT command

set.

Data Modes: Data rate selection is determined

by the speed of the originating and answering

modems:

Data modes perform complete handshake and data

rate negotiations. All tone and pattern detection

required by the applicable CCITT or Bell standard

are supported.

Originate Modem Connect Speed Based on Answer

Rate (bps)

Modem Rate (bps)

300

1200

300

2400

300

1200

2400

300

1200

Fax modes support Group 3 fax requirements. Fax

data and fax control (V.21 300 bps) performed by

the modem is controlled and monitored through the

fax EIA-578 Class 1 insertion/deletion, and CRC

generation/checking is provided.

1200

2400

Fax Modes: Fax modes are negotiated as

defined in T.30 and are implemented by AT+F

Both transmit and receive fax data is buffered

within the modem. Data transfer to and from the

DTE is flow controlled by XON/XOFF.

commands.

The AT+FCLASS=1 command

causes entry into the fax mode from the data

mode. Most other fax class 1 commands, which

start with the AT+F prefix, are valid only in the

fax mode. All data commands are valid in the fax

mode except A/, On & Tn, and the escape

sequence (+++). The AT+FCLASS=0 command

terminates the fax mode and causes entry into the

data mode.

Configurations and Rates

The supported modem configurations and

signaling rates are listed in Table 1. In data modes

with serial interface selected, DTE rate offsets of

+1%, -2.5% are accommodated by adding/deleting

stop bits are required. In fax modes, the DTE rate

is 19200 bps.

Table 1. Configurations and Rates

Configuration Modulation

Transmitter Carrier

Data Rate

Baud

Bits Per

Symbol

Constellation

Points

Frequency (Hz) +0.01%

(bps)

(Symbols/Sec.)

Data Mode

Answer

2400

2225

Originate

1200

1270 M

V.22

Bell 212A

Bell 103

QAM

DPSK

FSK

2400

1200

300

600

300

4

2

1

16

4

1

2025 S

1070 S

Fax Mode

V.29

V.22

Bell 212A

Bell 103

Receive

N/A

1800

1650 M

1850 S

Transmit

1700

1800

1650 M

1850 S

QAM

DPSK

FSK

9600

7200

4800

2400

300

2400

1600

1200

300

4

3

2

1

16

8

4

1

Notes:

Legend:

QAM = Quadrature Amplitude Modulation

DPSK = Differential Phase Shift Keying

FSK = Frequency Shift Keying

M

S

= Mark Condition

= Space Condition

N/A = Not Applicable

2

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

Table 2. “AT” Command Set Summary

Table 3. Fax Command Set Summary

Command

Function

Re-execute command

Answer a call

Select CCITT or Bell Mode

Carrier control

Dial modifier

Command echo

On-line character echo option

Disconnect (Hangup)

Identification

Fax Command

+FCLASS=n

+F<command>?

+F<command>=?

+FAA=n

+FF

+FTS=n

+FRS=n

+FTM=n

+FRM=n

Function

A/

Service class

A

Report Active Configuration

Report Operating Capabilities

Data/Fax Auto Answer

Enhanced flow Control

Stop Transmissions & Wait

Receive Silence

Bn

Cn

Dn

En

F1

Hn

In

Transmit Data

Receive Data

Ln

Mn

On

P

Qn

Sn

Sn=v

Sn?

T

Speaker volume

Speaker control

Go on-line

Force pulse dialing

Quiet Result codes control

Select S register as default

Set default S register to value

Return the value of S register

Force DTMF dialing

+FTH=n

+FRH=n

+FRTn

+FTTn=m

Transmit Data with HDLC Framing

Receive Data with HDLC Framing

Receive Test Data

Transmit Test Data

Rockwell Protocol Interface (RPI Enable

+Hn

Vn

Report codes form

Table 4. Register Summary

Xn

Yn

Zn

&Cn

&Dn

&F

&Gn

&Jn

&L0

&M0

&Pn

&Q0

&Sn

&Tn

&V

&Wn

&X0

&Yn

&Zn=x

%Dn

%J

Extended result codes

Long space disconnect

Soft reset and restore profile

RLSD (DCD) option

DTR option

Register

Function

Rings to Auto-Answer

Ring Counter

Escape Character

Carriage Return Character

Line Feed Character

Backspace Character

Maximum time to Wait for Dial Tone

Wait for Carrier

Pause Time for Comma

Carrier Detect Response Time

Carrier Loss Disconnect Time

DTMF dialing Speed

S0*

S1

S2

S3

S4

S5

S6

S7

S8

Recall (restore)factory profile

Select guard tone

Telephone jack control

Dial-up line operation

Asynchronous mode

Pulse dial make/break ratio

Asynchronous mode

DSR override

S9

S10

S11

S12

S14*

S16

S17

S18*

S19

S20

S21*

S22*

S23*

S24

S25*

S26*

S27*

S28*

Test and diagnostic

Escape Prompt Delay

Display current configurations

Store current configuration

Asynchronous data transmission

Select default profile

Store dial string to location n

DTMF Level Attenuation

Load Secondary Defaults

Transmit Level Attenuation

Function

General Bit mapped Options

Test Mode Bit Mapped Options (&T)

Fax Mode Null Byte Timer

Test Timer

Rockwell Protocol Interface Speed

Fax Mode Inactivity Timer

General bit Mapped Options

General Bit Mapped Options

Sleep Inactivity Timer

%Ln

Dial Modifier

P

R

S=n

Pulse Dial

Originate Call in Answer Mode

Dial Stored Number

Tone Dial

Delay to DTR Off

RTS-to-CTS Delay

General Bit Mapped Options

General Bit-Mapped Options

T

W

Wait for Dial Tone

;

Return to Idle State

* Register value may be stored in one of two user profiles with the

AT&W command.

@

!

Wait for Quiet Answer Command

Flash Hook

,

Pause

Dial Digits/ Characters

0-9, A, B, C, D, #, *

3

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

Equalization

Automatic adaptive qualization as well as fixed

compromised equalization is provided to

compensate for line distortions and to minimize

the effects of the intersymbol interference.

Table 5. Results Codes & Messages

Digit

Code

0

Word Code

Meaning

OK

Command line executed without

errors

1

CONNECT

Connection at 300bps

Scrambler/Descrambler

2

3

4

RING

NO CARRIER

ERROR

Ringing signal detected

The modem incorporates a self-synchronizing

scrambler/ descrambler satisfying the applicable

CCITT or Bell requirements.

Carrier lost or never present

Invalid command, checksum, error

in command line, or command line

exceeds 40 characters

Transmit Level

The transmit level is –10 dBm +1 dB (at TIP and

RING).

5

6

7

8

CONNECT 1200 Connection at 1200 bps

NO DIAL TONE No dialtone detected

BUSY

Busy signal detected

No silence detected when dialing a

system not providing a dialtone

NO ANSWER

Answer Tone: An answer tone of 2100 Hz

(V.22bis, V.22, or T.30) or 2225 Hz (Bell 212A or

103) is generated.

10

+F4

13

CONNECT 2400 Connection at 2400 bps

+FCERROR

DATA

Fax carrier error

Connected as data modem during

auto answer

Connected as fax modem during

auto answer

Guard Tone: An 1800 Hz guard tone can be

generated in all data modes.

15

FAX

Data/Fax Auto Answering

Calling Tone: A 1100 Hz (0.5 seconds on, 3

seconds on, 3 seconds off) calling tone (T.30) is

generated in the originate fax mode.

The modem can automatically determine if the incoming

call is from a data or fax modem, make the appropriate

connection, and inform the DTE of the connection type.

AT Command Format

Receive Level

Each command line must start with the AT prefix and be

terminated with a carriage return (CR). Several commands

may be included on one command line. A command line

may contain up to 40 characters excluding the AT prefix and

the terminating CR. A separator is not required between

data commands. A semicolon (;) separator is required

between fax commands.

The receiver satisfies performance rquirements for

a received signal from –9 dBm to –43 dBm. The

carrier detect is ON at –43 dBm and OFF at –48

dBm with a minimum of 2 dB hysteresis.

Receiver Tracking

The modem can accommodate carrier frequency

offset up to +7 Hz, and a transmit timing error of

+ 0.01% (V.22 bis or V.27 ter) or + 0.02% (V.22

or Bell 212A).

AT commands are composed of 10-bit ASCII encoded

asynchronous characters. The character format in data mode

is 8 data bits with no parity, or 7 data bits with even, odd, or

no (two stop bits) parity, at a data rate of 19200, 2400, 1200,

or 300 bps. The character format in fax mode is 8 data bits

with no parity at 19200 bps.

Low Power Sleep Mode

To conserve power, the CH224ATF is configured

for idle (power down) mode. Idle mode is entered

whenever the modem is inactive beyond the time

value specified by S24.

Data Modulation

The data modulation conforms to V.29, V.27 ter, V.22 bis,

V.22, V.21, Bell212A, or Bell 103, depending on the

selected configuration. Transmitter and receiver spectrum

shaping is provided in accordance with the applicable

standard.

The idle mode allows reduced power consumption

with automatic recovery without additional

circuitry. The modem exits Idle mode and returns

to full operation whenever a ring signal occurs, the

DTE writes to the modem (parallel interface), or

~DTR or ~TXD is asserted (serial interface).

4

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

HARDWARE INTERFACE

Serial/Indicator Interfaces

A DTE serial interface and indicator output are supported.

Serial Interface. A TTL logic serial interface to the DTE is supported.

LED indicator interface. Four direct connect LED indicator outputs are supported.

Speaker Interface

A speaker output, controlled by AT or V.25 bis commands, is provided for an optional OEM-supplied speaker circuit.

Line Interface

The CH224ATF connects to the telco line via tip and ring signals.

TTL

SERIAL

TELCO JACK

& EMI

INTERFACE

FILTERING

CH224ATF

INDICATOR

LEDS

SPEAKER

CIRCUIT

TTL Serial Interface

CH224ATF Integrated System Block Diagram

LOW POWER MODES

HARDWARE INTERFACE

SIGNALS

Sleep mode

Entry. The modem will enter the low power sleep

mode when no line connection exists and no host

activity occurs for the period of time specified in the

S24 register. All device circuits are turned off except

the internal MCU clock circuitry in order to consume

lower power, but are able to immediately wake up and

resume normal operation.

The SocketModem pin assignments for serial

TTL interface selected are shown in Figure 2

and are listed in Table 7.

The SocketModem hardware interface

signals are defined in Table 9.

The digital electrical characteristics for the

hardware interface signals are listed in Table

10.

Wake-up. Wake-up occurs when a ring signal occurs,

or the DTE sends a character to the modem.

The analog electrical characteristics for the

hardware interface signals are listed in Table

11.

The current absolute maximum ratings are

listed in Table 13.

5

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

DAA

TIP

RING

1

2

64 SPKR

63 AGND

62 NC

61 VCC

~RESET

24

41

40

DGND

~DTRTTL

DGND 26

NC 27

39 ~DCOTTL

38 ~CTSTTL

37 ~DSRTTL

DCDIND 29

RXIND 30

~DTRIND 31

TXIND 32

36

35

34

33

~RITTL

~TXDTTL

NC

Notes: Pins 10-23, 25, 28, and 42-53 are not installed.

Figure 3. CH224ATF (Serial TTL Pinout)

6

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

Table 7. CH224ATF Serial TTL Signals

Signal I/O Type Pin

Signal

I/O Type

-

1

TIP

IF

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

NC

2

RING

IF

~RXDTTL

~TXDTTL

~RITTL

~DSRTTL

~CTSTTL

~DCDTTL

~DTRTTL

DGROUND

NO PIN

NO PIN*

VCC

OA

3

NO PIN

~RESET

N0 PIN

DGROUND

NC

-

IA

4

-

OA

5

-

OA

6

-

OA

7

-

OA

8

-

IA

9

-

GND

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

-

IC

-

GND

-

NO PIN*

DCDIND

RXDIND

~DTRIND

TXIND

-

OG

PWR

-

NC

AGROUND

SPKR

GND

O(DF)

* It is suggested that a hole be placed in the host board for upgrade purposes.

7

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

Table 9. Signal Designations

Signal Name Designation

Label

I/O

The Serial Interface signals are all TTL-level.

~RXDTTL

OA

Received Data. Active low. The modem uses the ~RXD line to send

data received from the telephone line to the DTE and to send modem

responses to the DTE. During command mode, ~RXD data represents

the modem responses to the DTE. Modem responses take priority over

incoming data when the two signals are in competition for ~RXD.

Transmitted Data. Active low. The DTE uses the ~TXD line to send

data to the modem for transmission over the telephone line or to transmit

commands to the modem. The DTE should hold this circuit in the mark

state when no data is being transmitted or during intervals between

characters.

~TXDTTL

~RITTL

IA

OA

Ring Indicate. Active low. ~RI output ON (low) indicates the presence

of an ON segment of a ring signal on the telephone line. The modem will

not go off-hook when ~RI is active; the modem waits for ~RI to go

inactive before going off-hook.

For US models, ~RI will respond to ring signals in the frequency range of

15.3 Hz to 68 Hz. The ring signal cycle is typically two seconds ON,

four seconds OFF. The OFF (high) condition of the ~RI input should be

maintained during the OFF segment of the ring cycle (between rings) and

at all other times when ringing is not being received.

~DSRTTL

OA

Data Set Ready. Active low. ~DSR indicates modem status to the DTE.

~DSR OFF (high) indicates that the DTE is to disregard all signals

appearing on the interchange circuits except Ring indicator (~RI). ~DSR

output is controlled by the AT&Sn command.

If the AT&S1 option is selected, ~DSR will come ON in the handshaking

state when carrier is detected in the originate mode or when carrier is first

sent in the answer mode. In addition if a test mode is entered (AT&T1,

AT&T3, AT&T6-AT&T8), ~DSR will go off while the test is running.

~DSR goes OFF if ~DTR goes OFF.

If AT&Q0 and AT&S0 are selected, ~DSR will remain on at all times

regardless of the modem’s current state.

~CTSTTL

OA

Clear To Send. Active low. ~CTS is controlled by the modem to

indicate whether or not the modem is ready to transmit data. CTS OFF

indicates to the DTE that it should not transfer data across the interface

on TXD. In data modes, the ~CTS output is always ON. In fax modes,

~CTS is optionally used for flow control.

~DCDTTL

~DTRTTL

OA

IA

Data Carrier Detect. Active low. When AT&C0 commands is not in

effect, ~DCD output is ON when a carrier is detected on the telephone

line or OFF when carrier is not detected.

~DCD can be strapped ON using AT&C0 command.

Data Terminal Ready. Active low. The ~DTR input is turned ON

(low) by the DTE when the DTE is ready to transmit or receive data.

~DTR ON prepares the modem to be connected to the telephone line, and

maintains the connection established by the DTE (manual answering) or

internally (automatic answering). ~DTR OFF places the modem in the

disconnect state under control of the &DN and &Qn commands. The

effect of ~DTR ON and ~DTR OFF depends on the &Dn and &Qn

commands. Automatic answer is enabled when ~DTR is ON if the

“Answer Ring count” selectable option is not set to 0. Regardless of

which device is driving ~DTR, the modem will respond to an incoming

8

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

ring by going off-hook and beginning the handshake sequence.

The response of the modem to the ~DTR signal is very slow (up to 10

ms) to prevent noise from falsely causing the modem to disconnect from

the telephone line.

GND

Ground

LED drivers are open-drain inverter-driven (74HCT05) lines with

1.5K ½, 1/10W pull-up resistors on-board.

DCDIND

RXDIND

~DTRIND

SPKR

OG

DCD LED indicator. Active high DCD status.

RXD LED indicator. Active high RXD status.

DTR LED indicator. Active high TXD status.

Speaker Analog Output. The SPKR output reflects the received analog

input signal. The SPKR is controlled by the ATMn command.

O(DF)

SKR is tied directly to SPKR pin of the data pump.

Table 10. Digital Interface Characteristics

Parameter

Sy

mb

ol

Min.

Typ. Max.

Units

Test Conditions

Input High Voltage

Type IA

Type IC

Type IH

Input Low Voltage

Type IA and IC

Input Low Voltage

Type IF

Input Leakage Current

IA and IC

^VIH

Vdc

2.0

3.5

-30

-

^VCC

30

^VIL

Vdc

Vrms

mAdc

Vdc

-0.3

38

-

0.8

Note2

-

^IIN

+10

^VIN=0 to ^VCC

-

VOH

Output High Voltage

Type OA

2.4

-

ILOAD = 100mA

ILOAD = 0 mA

Type OD

Type OG

-

^VCC^V

CC

Output Low Voltage

Type OA

^VOL

Vdc

^ILOAD = 1.6 mA

^ILOAD = 0.8 mA

^ILOAD = 15 mA

^ILOAD = 8 mA

Type OB

Type OD

Type OG

Three –State (Off) Current

^ITS

+25

^VIN=0.8 V to 4.5V

mAdc

Notes:

1. Test Conditions: ^VCC = 5V + 5%, ^TA = 0°C to 70°C (unless otherwise stated.)

Output loads: 50 pF + one TTL.

2. AC ^Vrms voltage between Tip and Ring, using the on-boatd modular DAA.

9

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

Value

Table 11. Analog Characteristics

Type Characteristic

Name

SPKR

O (DF)

Minimum Load

300W

Maximum Capacitive Load

Output Impedance

Output Voltage

0.01mF

10W

2.5 + 1.6V

< 20 mV

D.C Offset

Table 12. Current and Power Requirements

Current (ID)

Power (PD)

Typical

Current

@25°C

Maximum

Current

@0°C

Typical

Power

@25°C

Maximum

Power

@0°C

Mode

Serial TTL

Normal mode

Sleep mode

31mA

7 mA

33 mA

9 mA

155 mW

35 mW

165 mW

45 mW

Notes:

1. Test conditions: 5.0 VDC for typical values; VDD = 5.25 for maximum values.

Table 13. Absolute Maximum Ratings

Parameter

Symbol

^VDD

^VIN

Limits

-0.5 to +6.0

-0.5 to (+5VD +0.5)

-0.3 to (+5VA +0.3)

-0.5 to (+5VD +0.5)

+20

Units

Supply Voltage

Input Voltage

Analog Inputs

V

MA

V

^VIN

Voltage Applied to Outputs in High Z State

DC Input Clam Current

DC Output Clamp Current

Static Discharge Voltage (@25°C)

Latch-Up Current (@25°C)

Operating Temperature Range

Storage Temperature Range

^VDD

^IIK

^IOK

+20

+2500

+400

^VESD

^ITRIG

^TA

mA

-0 to +70

-40 to +80

°C

^TSTG

10

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

Figure 5. CH224ATF Physical Dimensions

11

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

PHONE LINE CONNECTION GUIDELINES

1) The CH224ATF must be mounted in the final

assembly such that it is isolated from exposure to

any hazardous voltages within the assembly.

Adequate separation and restraint of cables and

cords must be provided.

2) The circuitry from the CH224ATF to the

telephone line interface must be provided in wiring

that carries no other circuitry other than that

specifically allowed in the FCC rules (such as A

and A1 leads).

The entire host product must be submitted to

the country of interest’s Telephone Network

approval authority. They are available on

special order. The end product supplier is

responsible for submission of the end product

for independent testing and subsequent

approval. See Application Cermetek Note

#142 for typical telephone requirements.

CH224ATF HANDLING AND

ASSEMBLY RECOMMENDATIONS

The CH224ATF contains static-sensitive

compo-nents and should only be handled by

personnel and in areas that are properly

protected against static discharge.

3) Connection to phone line should be made

through an RJ-11C jack.

4) PCB traces from the modem’s RING and TIP

pins to the RJ-11C jack must be 0.1 inch spacing

or greater to one another and 0.2 inch spacing or

greater to all other traces. The traces should have a

nominal width of 0.020 inches or greater.

5) The RING and TIP PCB traces should be as

short as possible and oriented to prevent coupling

other high speed or high frequency signals present

on the host circuit PCB.

6) No additional circuitry other than that shown in

Figure 7A or 7B may be connected between the

modem module and the RJ-11C jack. Doing so will

invalidate the FCC approval.

7)

The CH224ATF requires external surge

protection (see Figure 7).This is mandatory to

maintain FCC Part 68 conveyed approval.

8)

The CH224ATF, the RJ-11C jack, the

interfacing circuitry and all PCB traces in between,

must be contained on a PCB with a 94 V-0

flammability rating.

9) The supplied FCC registration label must be

applied visibly on the outside of the product.

10) The product ’s User Manual must provide the

user

with instructions for connection and use as

recommended in the FCC Registration Section

below.

INTERNATIONAL APPROVALS

The CH224ATF can be approved for some

international telephone connections. This must be

done after the modem is installed in the host

product.

12

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

FCC REGISTRATION

comply with the mechanical requirements specified in

Part 68, Sub-part F, specifically the dimensions,

tolerances and metallic plating requirements. The

compliance of these connectors will be assured by

purchase specifications and incoming inspection.

Documentation of such specifications and/or inspections

will be provided to the FCC within 30 days of their

request for the same.

All products in the CH224ATF series are registered with

the FCC (Federal Communications Commission) under

Part 68. To maintain the validity of the registration, you

must serve notice to the end user of the product of

several restrictions the FCC places on the modem and its

use.

The CH224ATF requires external surge protection (see

Figure 7) This is mandatory to maintain FCC Part 68

conveyed approval.. Refer to Cermetek Application

Note #126 for more details.

Telephone Company Procedures: The goal of the

telephone company is to provide you with the best

service it can. In order to do this , it may occasionally be

necessary for them to make changes in their equipment,

operations or procedures. If these changes might affect

your service or the operation of your equipment, the

telephone company will give you notice, in writing, to

allow you to make any changes necessary to maintain

uninterrupted service.

In addition to restriction notification, the FCC requires

that Cermetek make all repairs to all products in the

CH224ATF. If repairs are necessary after installation of

the CH224ATF in the end product and the end product

has been delivered to the end user, the end product must

be returned to the end product supplier where the

CH224ATF can be removed and then forwarded to

In certain circumstances, it may be necessary for the

telephone company to request information from you

concerning the equipment which you have connected to

your telephone line. Upon request of the telephone

company, provide the FCC registration number and the

ringer equivalence number (REN); both of these items

are listed on the equipment label. The sum of all of the

Cermetek for repair.

The following notice is

recommended and should be included in the end

product ’s user manual.

13

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)

PRELIMINARY

CH224ATF

FOR YOUR USER ’S MANUAL

REN ’s on your telephone lines should be less than five

The Part 68 rules require the following (or equivalent) in order to assure proper service from the telephone

be provided to the end user of equipment containing a company. In some cases, a sum of five may not be use-

DAA:

able on a given line. Consult your telephone provider.

Type of Service: The (insert end product name)is If Problems Arise: If any of your telephone equipment

designed to be used on standard device telephone lines. is not operating properly, you should immediately

It connects to the telephone line by means of a standard remove it from your telephone line, as it may cause harm

jack called the USOC RJ-11C (or USOC RJ45S). to the telephone network. If the telephone company

Connection to telephone-company-pro-vided coin notes a problem, they may temporarily discontinue

service (central office implemented systems) is pro- service. When practical, they will notify you in advance

hibited. Connection to party lines service is subject to of this disconnection. If advance notice is not feasible,

state tariffs.

you will be notified as soon as possible.

Changes in Attestation Procedure for Plugs and

Jacks:

(Name of applicant) attests that the network interface

plugs or jacks used on this equipment comply with and

will continue to telephone provider.

Cermetek reserves the right to make changes in specifications at any time and without notice. The information furnished

by Cermetek in this publication is believed to be accurate and reliable. However, no responsibility is assumed by

Cermetek for its use, 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.

Printed in U.S.A

406 TASMAN DRIVE | SUNNYVALE CA 94089 | LOCAL: 408-752-5000 | TOLL FREE: 1-800-882-

6271 | FAX: 408-752-5004 | WEB SITE: http://www.cermetek.com | EMAIL: sales@cermetek.com

14

ã 1999 Cermetek Microelectronics, Inc.

Document No. 607-0005 Rev.A (11/99)


型号：	CH224ATF
厂家：	ETC
描述：	Telecommunication IC 电信IC\n 电信
文件：	总14页 (文件大小：252K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CH224ATF [ETC]

相关型号：

CH224B

CH224D

CH224DIU

CH224DU

CH2250

CH2250A

CH2251

CH2251A

CH2252

CH2252A

CH2253A

CH2254