ETC CH224ATF

PRELIMINARY
CH224ATF
CH224ATF
Complete 2400 bps Modem Module
INTRODUCTION
FEATURES
The CH224ATF is a complete FCC Part 68 preapproved, 2400 bps full function modem solution; 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).
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This product is specifically designed for use as
direct re-placement for Conexant/Rockwell’s
SocketModem (serial TTL I/O option, Part
No. SF224ATF-H1-D5-A0-P1).
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This modem provides a fast and convenient
way to integrate a PSTN connectivity into any
OEM product while utilizing a small portion of
PCB area.
The CH224ATF requires two
external interfaces: a CCITT V.24 serial
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.
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.
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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)
Enhanced AT commands
Group 3 fax modes
V.29 (6900/7200 bps) transmit
V.27 ter (4800/2400 bps) transmit and
receive
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
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
Low power consumption (typical):
Interface
Serial TTL:
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Operating
155mW
Sleep
35mW
Single +5VDC power supply
1
1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
CH224ATF
PART NUMBER ORDERING INFORMATION
Part Number
CH224ATF
Description
Data/Fax modem module with TTL serial interface, on-board DAA, 0.310” pins
TECHNICAL SPECIFICATIONS
General
The CH224ATF modem is a full-featured, selfcontained data/fax solution. External microcontroller for data or fax control functions are fully
supported and controlled through the AT command
set.
Data modes perform complete handshake and data
rate negotiations. All tone and pattern detection
required by the applicable CCITT or Bell standard
are supported.
Operation
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.
Data Modes: Data rate selection is determined
by the speed of the originating and answering
modems:
Originate Modem
Rate (bps)
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.
Both transmit and receive fax data is buffered
within the modem. Data transfer to and from the
DTE is flow controlled by XON/XOFF.
Connect Speed Based on Answer
Modem Rate (bps)
300
1200
2400
300
300
300
300
1200
1200
1200
1200
2400
1200
1200
2400
Fax Modes: Fax modes are negotiated as
defined in T.30 and are implemented by AT+F
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
Data Mode
V.22
V.22
Bell 212A
Bell 103
QAM
DPSK
DPSK
FSK
Fax Mode
V.29
V.22
Bell 212A
Bell 103
QAM
DPSK
DPSK
FSK
Transmitter Carrier
Frequency (Hz) +0.01%
Answer
2400
2400
2400
2225
2025 S
Receive
N/A
N/A
1800
1800
1650 M
1850 S
Originate
1200
1200
1200
1270 M
1070 S
Transmit
1700
1700
1800
1800
1650 M
1850 S
Data Rate
(bps)
Baud
(Symbols/Sec.)
Bits Per
Symbol
Constellation
Points
2400
1200
1200
300
600
600
600
300
4
2
2
1
16
4
4
1
9600
7200
4800
2400
300
2400
2400
1600
1200
300
4
3
3
2
1
16
8
8
4
1
Notes:
Legend:
QAM = Quadrature Amplitude Modulation
DPSK = Differential Phase Shift Keying
FSK = Frequency Shift Keying
M = Mark Condition
S
= Space Condition
N/A = Not Applicable
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1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
CH224ATF
Table 2. “AT” Command Set Summary
Command
Function
Table 3. Fax Command Set Summary
Fax Command
Function
A/
A
Bn
Cn
Dn
En
F1
Hn
In
Ln
Mn
On
P
Qn
Sn
Sn=v
Sn?
T
Vn
Xn
Yn
Zn
&Cn
&Dn
&F
&Gn
&Jn
&L0
&M0
&Pn
&Q0
&Sn
&Tn
&V
&Wn
&X0
&Yn
&Zn=x
%Dn
%J
%Ln
Dial Modifier
P
R
S=n
T
W
;
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
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
Report codes form
Extended result codes
Long space disconnect
Soft reset and restore profile
RLSD (DCD) option
DTR option
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
Test and diagnostic
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
Pulse Dial
Originate Call in Answer Mode
Dial Stored Number
Tone Dial
Wait for Dial Tone
Return to Idle State
+FCLASS=n
+F<command>?
+F<command>=?
+FAA=n
+FF
+FTS=n
+FRS=n
+FTM=n
+FRM=n
+FTH=n
+FRH=n
+FRTn
+FTTn=m
+Hn
@
!
,
0-9, A, B, C, D, #, *
Wait for Quiet Answer Command
Flash Hook
Pause
Dial Digits/ Characters
Service class
Report Active Configuration
Report Operating Capabilities
Data/Fax Auto Answer
Enhanced flow Control
Stop Transmissions & Wait
Receive Silence
Transmit Data
Receive Data
Transmit Data with HDLC Framing
Receive Data with HDLC Framing
Receive Test Data
Transmit Test Data
Rockwell Protocol Interface (RPI Enable
Table 4. Register Summary
Register
Function
S0*
Rings to Auto-Answer
S1
Ring Counter
S2
Escape Character
S3
Carriage Return Character
S4
Line Feed Character
S5
Backspace Character
S6
Maximum time to Wait for Dial Tone
S7
Wait for Carrier
S8
Pause Time for Comma
S9
Carrier Detect Response Time
S10
Carrier Loss Disconnect Time
S11
DTMF dialing Speed
S12
Escape Prompt Delay
S14*
General Bit mapped Options
S16
Test Mode Bit Mapped Options (&T)
S17
Fax Mode Null Byte Timer
S18*
Test Timer
S19
Rockwell Protocol Interface Speed
S20
Fax Mode Inactivity Timer
S21*
General bit Mapped Options
S22*
General bit Mapped Options
S23*
General Bit Mapped Options
S24
Sleep Inactivity Timer
S25*
Delay to DTR Off
S26*
RTS-to-CTS Delay
S27*
General Bit Mapped Options
S28*
General Bit-Mapped Options
* Register value may be stored in one of two user profiles with the
AT&W command.
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1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
CH224ATF
Equalization
Table 5. Results Codes & Messages
Digit
Code
Word Code
0
OK
1
2
3
4
CONNECT
RING
NO CARRIER
ERROR
5
6
7
8
CONNECT 1200
NO DIAL TONE
BUSY
NO ANSWER
10
+F4
13
CONNECT 2400
+FCERROR
DATA
15
FAX
Meaning
Command line executed without
errors
Connection at 300bps
Ringing signal detected
Carrier lost or never present
Invalid command, checksum, error
in command line, or command line
exceeds 40 characters
Connection at 1200 bps
No dialtone detected
Busy signal detected
No silence detected when dialing a
system not providing a dialtone
Connection at 2400 bps
Fax carrier error
Connected as data modem during
auto answer
Connected as fax modem during
auto answer
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.
Scrambler/Descrambler
The modem incorporates a self-synchronizing
scrambler/ descrambler satisfying the applicable
CCITT or Bell requirements.
Transmit Level
The transmit level is –10 dBm +1 dB (at TIP and
RING).
Answer Tone: An answer tone of 2100 Hz
(V.22bis, V.22, or T.30) or 2225 Hz (Bell 212A or
103) is generated.
Guard Tone: An 1800 Hz guard tone can be
generated in all data modes.
Data/Fax Auto Answering
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.
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.
AT Command Format
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.
Receive Level
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.
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.
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.
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).
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.
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).
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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
INTERFACE
TELCO JACK
& EMI
FILTERING
CH224ATF
INDICATOR
LEDS
SPEAKER
CIRCUIT
TTL Serial Interface
CH224ATF Integrated System Block Diagram
LOW POWER MODES
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.
Wake-up. Wake-up occurs when a ring signal occurs,
or the DTE sends a character to the modem.
HARDWARE INTERFACE
SIGNALS
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.
The analog electrical characteristics for the
hardware interface signals are listed in Table
11.
The current absolute maximum ratings are
listed in Table 13.
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1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
DAA
CH224ATF
TIP
RING
1
2
64
63
62
61
SPKR
AGND
NC
VCC
~RESET
24
41
40
DGND
~DTRTTL
DGND
NC
26
27
DCDIND
RXIND
~DTRIND
TXIND
29
30
31
32
39
38
37
36
35
34
33
~DCOTTL
~CTSTTL
~DSRTTL
~RITTL
~TXDTTL
~TXDTTL
NC
Notes: Pins 10-23, 25, 28, and 42-53 are not installed.
Figure 3. CH224ATF (Serial TTL Pinout)
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1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
Table 7.
Signal
Pin
CH224ATF
CH224ATF Serial TTL Signals
I/O Type
Pin
Signal
I/O Type
1
TIP
IF
33
NC
-
2
RING
IF
34
~RXDTTL
OA
3
NO PIN
-
35
~TXDTTL
IA
4
NO PIN
-
36
~RITTL
OA
5
NO PIN
-
37
~DSRTTL
OA
6
NO PIN
-
38
~CTSTTL
OA
7
NO PIN
-
39
~DCDTTL
OA
8
NO PIN
-
40
~DTRTTL
IA
9
NO PIN
-
41
DGROUND
GND
10
NO PIN
-
42
NO PIN
-
11
NO PIN
-
43
NO PIN
-
12
NO PIN
-
44
NO PIN
-
13
NO PIN
-
45
NO PIN
-
14
NO PIN
-
46
NO PIN
-
15
NO PIN
-
47
NO PIN
-
16
NO PIN
-
48
NO PIN
-
17
NO PIN
-
49
NO PIN
-
18
NO PIN
-
50
NO PIN
-
19
NO PIN
-
51
NO PIN
-
20
NO PIN
-
52
NO PIN
-
21
NO PIN
-
53
NO PIN
-
22
NO PIN
-
54
NO PIN*
-
23
NO PIN
-
55
NO PIN*
-
24
~RESET
IC
56
NO PIN*
-
25
N0 PIN
-
57
NO PIN*
-
26
DGROUND
GND
58
NO PIN*
-
27
NC
-
59
NO PIN*
-
28
NO PIN*
-
60
NO PIN*
-
29
DCDIND
OG
61
VCC
PWR
30
RXDIND
OG
62
NC
-
31
~DTRIND
OG
63
AGROUND
GND
32
TXIND
OG
64
SPKR
O(DF)
* It is suggested that a hole be placed in the host board for upgrade purposes.
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1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
Label
I/O
~RXDTTL
OA
~TXDTTL
IA
~RITTL
OA
~DSRTTL
OA
CH224ATF
Table 9. Signal Designations
Signal Name Designation
The Serial Interface signals are all TTL-level.
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.
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.
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.
~CTSTTL
OA
~DCDTTL
OA
~DTRTTL
IA
If AT&Q0 and AT&S0 are selected, ~DSR will remain on at all times
regardless of the modem’s current state.
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.
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
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1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
CH224ATF
ring by going off-hook and beginning the handshake sequence.
GND
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.
Ground
LED drivers are open-drain inverter-driven (74HCT05) lines with
1.5K ½, 1/10W pull-up resistors on-board.
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.
GND
DCDIND
RXDIND
~DTRIND
SPKR
OG
OG
OG
O(DF)
SKR is tied directly to SPKR pin of the data pump.
Parameter
Table 10. Digital Interface Characteristics
Sy
Min.
Typ. Max.
Units
mb
ol
V
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
Output High Voltage
Type OA
Type OD
Type OG
Output Low Voltage
Type OA
Type OB
Type OD
Type OG
Three –State (Off) Current
Notes:
IH
Vdc
2.0
3.5
-30
-
-0.3
-
V
CC
V
CC
30
V
IL
Vdc
V
IL
38
I
Test Conditions
Vrms
+10
IN
-
0.8
Note 2
V
IN=0 to V CC
µAdc
-
VOH
Vdc
2.4
-
-
V
CCV
CC
V
OL
ILOAD = 100µA
ILOAD = 0 mA
Vdc
I
LOAD = 1.6 mA
LOAD = 0.8 mA
I
LOAD = 15 mA
I
LOAD = 8 mA
V
IN=0.8 V to 4.5V
I
I
TS
+25
µAdc
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.
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1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
CH224ATF
Table 11. Analog Characteristics
Name
Type
SPKR
Characteristic
O (DF)
Value
Minimum Load
Maximum Capacitive Load
Output Impedance
Output Voltage
D.C Offset
300Ω
0.01µF
10Ω
2.5 + 1.6V
< 20 mV
Table 12. Current and Power Requirements
Current (ID)
Maximum
Current
Mode
Serial TTL
Normal mode
Sleep mode
Power (PD)
Typical
Maximum
Power
Power
Typical
Current
@25°C
@0°C
@25°C
@0°C
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
Limits
Supply Voltage
Input Voltage
Analog Inputs
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
V
DD
IN
V
IN
V
DD
I
IK
I
OK
V
ESD
I
TRIG
T
A
T
STG
V
-0.5 to +6.0
-0.5 to (+5VD +0.5)
-0.3 to (+5VA +0.3)
-0.5 to (+5VD +0.5)
+20
+20
+2500
+400
-0 to +70
-40 to +80
Units
V
V
V
V
MA
MA
V
mA
°C
°C
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1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
CH224ATF
Figure 5. CH224ATF Physical Dimensions
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1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
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).
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.
CH224ATF
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.
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.
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1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
FCC REGISTRATION
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.
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
Cermetek for repair.
The following notice is
recommended and should be included in the end
product ’s user manual.
CH224ATF
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.
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 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
13
1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)
PRELIMINARY
CH224ATF
FOR YOUR USER ’S MANUAL
The Part 68 rules require the following (or equivalent)
be provided to the end user of equipment containing a
DAA:
REN ’s on your telephone lines should be less than five
in order to assure proper service from the telephone
company. In some cases, a sum of five may not be useable on a given line. Consult your telephone provider.
Type of Service: The (insert end product name)is
designed to be used on standard device telephone lines.
It connects to the telephone line by means of a standard
jack called the USOC RJ-11C (or USOC RJ45S).
Connection to telephone-company-pro-vided coin
service (central office implemented systems) is prohibited. Connection to party lines service is subject to
state tariffs.
If Problems Arise: If any of your telephone equipment
is not operating properly, you should immediately
remove it from your telephone line, as it may cause harm
to the telephone network. If the telephone company
notes a problem, they may temporarily discontinue
service. When practical, they will notify you in advance
of this disconnection. If advance notice is not feasible,
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: 1-800-8826271 | FAX: 408-752-5004 | WEB SITE: http://www.cermetek.com | EMAIL: [email protected]metek.com
14
1999 Cermetek Microelectronics, Inc.
Document No. 607-0005 Rev.A (11/99)