2420RD Designers Guide

V.22bis North American Embedded Modem
2420RD Designer’s Guide
Rev. 1.0
March, 2001
Information contained in this document is provided in connection with Clare Inc. (Clare) Products and is believed to be
accurate and reliable. However, Clare assumes no responsibility for this material’s use, errors or emissions or for any
infringements of patents or rights of third parties which may result from its use. These materials are provided “as is”
without warranty of any kind, either expressed or implied. No license is granted by implication or otherwise under any
patent or patent rights of Clare.
Product names or services mentioned in this publication are for identification purposes only, and may be trademarks
of third parties. Third party names, brands, and marks are the property of their respective owners.
Clare’s products are not intended for medical implantation or other direct life support applications where malfunction
may result in direct harm, injury or death to a person.
2420RD Designer’s Guide
V.22bis North American Embedded Modem
Table of Contents
2420RD Reference Design Information ......................................................................................................... 3
Design Overview ............................................................................................................................................... 4
Designed for Regulatory Compliance............................................................................................................ 4
Design Features................................................................................................................................................. 4
Typical User Applications for Design............................................................................................................ 4
Modem Description........................................................................................................................................... 5
Low Power Mode ............................................................................................................................................... 5
Asynchronous and Synchronous Serial Data Interface ........................................................................................ 5
Phone Line Interface .......................................................................................................................................... 5
PIN Definitions ................................................................................................................................................... 6
Design Performance Parameters.................................................................................................................... 7
Modem PCB Mechanical Dimensions............................................................................................................ 8
Bill of Materials .................................................................................................................................................. 9
Assembly Information .................................................................................................................................... 10
Performance Test Data................................................................................................................................... 11
Clare Worldwide Offices ................................................................................................................................ 13
Page 2 of 13
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2420RD Designer’s Guide
V.22bis North American Embedded Modem
2420RD Reference Design Information
The Clare 2420RD reference material provides the necessary design information required to build a
V22bis embedded socket modem for us with the North American telephone network.
Along with this Designers Guide, the 2420RD consists of the following information that is also available
on Clare’s website at www.clare.com .
1.
2.
3.
4.
5.
6.
7.
2420RD Designers Guide (PDF)
2420RD Schematic Diagram (PDF)
2420RD Schematic in PADS
2420RD PCB Gerber Files
2420RD Assembly Views (PDF)
FCC Part 68 Test Report (PDF)
FCC Part 15 Test Report (PDF)
Further information about the modem chip itself and the “AT” command set used in Clare’s 2420RD
design can be found on TDK Semiconductor’s website at www.tsc.tdk.com .
Page 3 of 13
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2420RD Designer’s Guide
V.22bis North American Embedded Modem
Design Overview
Design Features
The 2420RD reference design material provides
the necessary information to manufacture a
2400bps embedded modem module for
applications requiring a data communications
link to the Public Switched Telephone Network
(PSTN). Embedded Modem Modules (EMM)
built using the 2420RD design information have
been successfully tested for compliance to FCC
and UL standards for the North American
market. (Please refer to the 2430RD Designer’s
Guide for TBR-21 European applications)
•
•
•
•
•
•
The 2420RD modem module design produces a
printed circuit board with dimensions of 1.45” x
1.85” (3.68cm x 4.70cm) that can be socketed or
soldered into the host system controller board.
OEMs can use the 2420RD to build embedded
modem modules for a variety of low data rate
applications such as a set top box billing modem
or any remote data acquisition application. The
2420RD design supports a standard V.24
interface to the host Data Terminal Equipment
(DTE).
Designed for Regulatory Compliance
•
•
•
•
•
Full Duplex 2400bps Design
Small 1.45” x 1.85” (3.68cm x 4.70cm) PCB
Low Power Consumption and Sleep Mode
V.24 DTE Interface
3.3V or 5.0V Operation
Data Speed:
§ V.22bis – 2400bps
§ V.22, Bell 212 – 1200bps
§ V.21, Bell 103 – 300bps
§ V.23, Bell 1200/75bps
Dynamic Range – 9dBm to –43dBm
Caller ID Capability
Typical User Applications for Design
•
•
•
•
•
•
•
•
•
Vending / Gaming Machines
Set Top Box Billing Modem
Direct Broadcast Satellite
Utility Meters
Point of Sales Terminals
Remote Diagnostics
Remote Telemetry
Remote Monitoring
Embedded Applications
FCC part 15B Compliance
FCC part 68 Compliance
UL Tested
2420 Embedded Modem Functional Block Diagram
Line
Interface
DTE Serial
Interface
CONTROLLER
V.22bis
DATA PUMP
Clare
LiteLink
DAA
TIP
RING
CPC5610
TDK 73M2901
3.3V or 5V
Page 4 of 13
GND
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2420RD Designer’s Guide
V.22bis North American Embedded Modem
Modem Description
The 2420RD reference design architecture is
based on a highly integrated TDK 73M2901 chip
that includes the CPU, AFE, MAC, ROM, RAM,
and UART that is controlled through the TDK
“AT" like command set. Detailed information and
support on this chipset can be found on the TDK
Semiconductor website at www.tsc.tdk.com. The
2420RD EMM design also utilizes a compact
Clare CPC5610 optical silicon DAA configured
for North American PSTN operation. The Clare
CPC5610 DAA eliminates the on-board coupling
transformer along with much of the regulatory
agency certification risk usually associated with
dial up modems. EMMs built using the 2420RD
material have been successfully tested to be
fully compliant with the FCC part 68 standard for
interface the telephone network. Clare’s
2420RD EMM reference design is capable of
being powered by either a single +3.3V or +5.0V
power supply source and supports automatic
standby idle mode. EMMs based upon the
2420RD will also accept a request to power
down from the DTE via hardware control.
Low Power Mode
enabled the modem module will go into a power
saving mode when idle. The on board oscillator
will be running, clocks will be supplied to the
modem’s UART, timers and interrupt blocks; but
no clocks will be supplied to the CPU. Instruction
processing and activity on the internal busses is
halted. Normal operation is resumed when an
interruption such as DTR, RING, or a character
send to the modem occurs.
Asynchronous and Synchronous Serial Data
Interface
The serial data interface consists of the TXD
and RXD data paths (LSBit shifted in and out
first, respectively); and the TXC and RXC serial
clock outputs for synchronous data mode;
CTS/RTS flow control; DCD, DSR and DTR. In
synchronous mode, the data is passed at the bit
rate (tolerance is +1%, -2.5%).
Phone Line Interface
The 2420RD design connects to the telephone
line via the TIP and RING pair of signal lines
located on J2 of the EMM. An additional EMI
suppression and fuse network connected to the
TIP and RING signal lines is recommended.
The 2420RD design supports a low power
mode. If the low power standby option is
Recommended EMI Suppression and Fuse Network
EMI Suppression and Fuse Network
Host DTE
Serial
Interface
Ferrite Bead
J1
J2
J2-2
TIP
J2-4
RING
Embedded
Modem
Page 5 of 13
L1
L2
Line
Jack
1.25A, 250V Slow-Blow
C1
C2
4700pF
2kV
F1
TIP
RING
4700pF
2kV
Ferrite Bead
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2420RD Designer’s Guide
V.22bis North American Embedded Modem
PIN Definitions
PIN NAME
TXD
TXC
RXD
RXC
-DTR
-RI
-DCD
-DSR
-CTS
-RTS
-LIU
PIN NUMBER
J1-1
J1-2
J1-3
J1-4
J1-5
J1-6
J1-7
J1-8
J1-9
J1-10
J1-11
GND
VCC
N.C.
TIP
J1-12
J1-13
J2-1
J2-2
I
I
I/O
N.C.
RING
J2-3
J2-4
I/O
N.C.
J2-5
-
TXD
TXC
RXD
RXC
-DTR
-RI
-DCD
-DSR
-CTS
-RTS
-LIU
GND
VCC
I/O Type
I
O
O
O
I
O
O
O
O
I
I/O
Description
Serial data input from DTE
Transmit data synchronous clock
Serial output to DTE
Receive data synchronous clock
External interrupt - DTE DTR signal input
Ring Indicator
Data Carrier Detect
Data Set Ready
Clear to Send
Request to Send
Line in use. This pin can be optionally configured as
an active low detect pin for us in “Line in Use” or
“Parallel-Pick-Up”.
Connect to digital ground system
Positive supply voltage of 3.3V or 5.0V nominal
No connect
To telephone line TIP connection via optional EMI
suppression network and fuse.
No connect
To telephone line RING connection via optional EMI
suppression network and fuse.
No Connection
VCC
J1
J1
J2
NC
TIP
NC
RING
NC
10K
Ohms
Pin-11
2420 Modem PCB
(Top View)
If LIU is not used for “Line in Use” or “ParallelPick-Up” detection, it is advised to pull up Pin
J1-11 as shown here:
Page 6 of 13
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2420RD Designer’s Guide
V.22bis North American Embedded Modem
Design Performance Parameters
Absolute Maximum Ratings (@ 25oC)
PARAMETER
Isolation Voltage
Tip/Ring Current
Operating Temperature
Storage Temperature
Relative Humidity
(Non-Condensing)
Soldering Duration
MIN
MAX
1500
60
+85
+125
85
12
-20
-40
10
UNITS
VRMS
mA
o
C
o
C
%
o
C
DC Characteristics DTE Interface
(TXD, TXC, RXD, RXC, -DTR, -RI, DCD, -DSR, -CTS, -RTS, -LIU, GND, VCC)
PARAMETER
Input Low voltage
Input High voltage
Output Low voltage
Output High voltage
Input Leakage Current
SYMBOL
VIL
VIH
VOL
VOH
IIH
MIN
- 0.5
0.5VCC
VCC - 0.45
1
TYP
-
MAX
0.2VCC
VCC + 0.5
0.45
30
UNIT
V
V
V
V
mA
CONDITION
MIN
TYP
40.6
16.6
5.6
MAX
UNIT
mA
mA
mA
CONDITION
Normal Mode
Idle Mode
Down Mode
TYP
27.2
12.2
5.2
MAX
UNIT
mA
mA
mA
CONDITION
Normal Mode
Idle Mode
Down Mode
IOL = 4mA
IOH = -4mA
GND<VIN< VCC
DC Characteristics 5V Operations
PARAMETER
Max Power Supply Current
Max Power Supply Current
Max Power Supply Current
SYMBOL
IDD11
IDD2
IDD3
-
DC Characteristics 3.3V Operations
PARAMETER
Max Power Supply Current
Max Power Supply Current
Max Power Supply Current
Page 7 of 13
SYMBOL
IDD11
IDD2
IDD3
MIN
-
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2420RD Designer’s Guide
V.22bis North American Embedded Modem
Modem PCB Mechanical Dimensions
Page 8 of 13
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2420RD Designer’s Guide
V.22bis North American Embedded Modem
Bill of Materials
A complete list of the materials used in the 2420RD embedded modem reference design can be found
below. The exact costs for the material will vary depending upon the quantities purchased and variable
market conditions. In general, the material cost of the 2420RD should be under $8.00 US.
March, 2001
Rev.C.
Clare 2420RD BOM
V.22bis North American/Japan 2400 Embedded Modem Design
QTY REF_DES
9
C1-C4, C9,C15
C16,C18,C19
2
C6-C7
1
C10
1
C11
1
C13
1
C14
3
C17, C20-C21
1
DB1
1
J1
1
J2
1
Q1
4
R1,R2,R24,R26
1
R3
1
R4
1
R5
1
R6
2
R7,R8
1
R9
2
R10,R11
1
R12
1
R13
3
R14,R17,R27
2
R15,R16
1
R18
1
R19
1
R20
1
R21
1
R22
1
R23
1
R28
1
SP1
1
U1
1
U2
Y1
1
DEVICE
CAPV_603
PKG_ DESC PKG_TYPE
CHIP CAP CC0603
VALUE
0.1
VOLT WATT TOL CLARE_NO
16V
10% SKB271
VENDOR
Tecate
VENDOR_NO
CMC-016/104KX0603T
CAPH_1808
CAPH_1206
CAPV_603
CAPV_603
CAPV_603
CAPV_3216
SIZB60
SIP-13P
SIP-5P
CPC5602C
RESV_603
RESV_603
RESH_603
RESV_603
RESV_603
RESH_603
RESH_603
RESV_603
RESV_603
RESV_805
RESH_603
RESH_603
RESH_603
RESV_603
RESV_603
RESH_603
RESH_603
RESH_603
RESH_603
P3100SB
CPC5610
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
BR_R
CONN
CONN
PWR
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
TRAN
DAA
DSP
XTAL
220PF
0.01
0.027
27pF
33pF
10
2000V
500V
16V
50V
50V
6.3V
600V
Nova Cap
Tecate
Tecate
Tecate
Tecate
Tecate
SHINDENGEN
Com Con Connectors
Com Con Connectors
Clare
Meritek
Meritek
IMS
IMS
IMS
IMS
IMS
IMS
IMS
IMS
Meritek
Meritek
IMS
IMS
IMS
IMS
IMS
IMS
IMS
TECCOR
Clare
TDK
Ralton
1808N221K202NT
CMC-500/105JX1206T
CMC-050/273JX0805T
CMC-050/270JX0603T
CMC-050/330JN0603T
522-016/100KTRB
SIZB60
DS1-140/220/140-13G2
DS1-140/220/140-05G2
CPC5602
CR16103J
CR16203J
RCI-0603-8062JT
RCI-0603-1273JT
RCI-0805-1504JT
RCI-0805-3604JT
RCI-0603-4223FT
RCI-0603-1004JT
RCI-0603-68R1FT
RCI-0805-8R2OFT
CR16000J
CR16204J
RCI-0603-1694FT
RCI-0603-4R70JT
RCI-1206-1305JT
RCI-0603-2700JT
RCI-0603-1500JT
RCI-0603-3000JT
RCI-0603-1503JT
P3100SB
CPC5610A
73M2901
AS-11.0592-18-Fund-Ext-SMD-T
Page 9 of 13
CAP
CAP
CAP
CAP
CAP
CAP
ECT
13PIN
5PIN
MOS
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
SUPP
IC
IC
OSC
CC1808
CC1206
CC0805
CC0603
CC0603
3216
SHINDENBRI
SIP-13P
SIP-5P
SOT223
CR0603
CR0603
CR0603
CR0603
CR0805
CR0805
CR0603
CR0603
CR0603
CR0805
CR0603
CR0603
CR0603
CR0603
CR1206
CR0603
CR0603
CR0603
CR0603
DO-214AA
DIP32_SOL
10%
10%
10%
10%
10%
10%
350V
10K
20k
80.6K
127K
1.5M
3.6M
42.2K
1M
68.1
8.2
0
200K
1.69M
4.7
13M
270
150
300
150K
350V
11.0592M
1/16W
1/16W
1/16W
1/16W
1/16W
1/10W
1/16W
1/16W
1/16W
1/8W
1/16W
1/16W
1/16W
1/16W
1/4W
1/16W
1/16W
1/16W
1/16W
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
SKB297
SKB299
SKB296
SKB298
SKB276
SKB218
SKB227
SKB300
SKB301
CPC5602C.2
SKB194
SKB195
SKB310
SKB302
SKB313
SKB314
SKB303
SKB304
SKB305
SKB315
SKB267
SKB255
SKB311
SKB306
SKB317
SKB307
SKB308
SKB309
SKB312
SKB223
CPC5610A.2
SKS369
SKB318
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2420RD Designer’s Guide
V.22bis North American Embedded Modem
Assembly Information
Basic PCB assembly drawings are shown below with further details available in the PCB files included as
part of the 2420RD design package.
Assembly Instruction Notes:
1. Note orientation of U1, U2, C17, C20, and DB1
2. J1 and J2 are soldered on the bottom layer and soldered on the top layer
3. C8, C12, C22 and R25 are not used
Page 10 of 13
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2420RD Designer’s Guide
V.22bis North American Embedded Modem
Performance Test Data
Clare has performed automated testing of embedded modems built using the 2420RD design material
using TAS Telephone Network Emulators. The TAS Emulators test loops are compatible with the testing
standards from the EIA/TIA, NTT, and RITT and incorporate built-in setup files for common exchange and
impairment conditions. Each TAS Emulator test loop has been assigned a percentage of how often it
occurs in the real world PSTN network allowing the TAS Emulator to be set up to perform many types of
tests. Each loop is given an EIA and TIA identifier, for example our second line tested is the TIA case
I9A, LoopB=EIA1. A good source for further information can be found in TIA document TR30.3, or the
TAS web site www.taskit.com by going to the support pull down menu and then to application notes.
For modem designers, one of the more common tests performed is data throughput over the emulated
PSTN test loops. Throughput testing checks the complete modem design by providing the initial
connection speed information along with what the actual rate or throughput the data is transferred across
the PSTN test loop. Therefore, TAS Emulator throughput test data provides information about the
complete modem including the line interface or data access arrangement (DAA), the resolution of the
codec, and most importantly the DSP’s ability to compress and error correct the data. Data presented in
the chart below represents the results Clare obtained form EMM built with the 2420RD design material.
The actual raw test data can be found on the following page.
2420RD EMM Throughput Rate Over TIA Test Loops
2500
2000
1500
1000
500
TIA Loops Number
Page 11 of 13
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81
76
71
66
61
56
51
46
41
36
31
26
21
16
11
6
0
1
Connect Rate (bps)
3000
2420RD Designer’s Guide
V.22bis North American Embedded Modem
Test Loop
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
Page 12 of 13
Description
Clean case, Loop B = Null
TIA case I9A, Loop B = EIA1
TIA case I9A, Loop B = EIA3
TIA case I9A, Loop B = EIA4
TIA case I9A, Loop B = EIA5
TIA case I9A, Loop B = EIA6
TIA case I9B, Loop B = EIA1
TIA case I9B, Loop B = EIA3
TIA case I9B, Loop B = EIA4
TIA case I9B, Loop B = EIA5
TIA case I9B, Loop B = EIA6
TIA case I9C, Loop B = EIA1
TIA case I9C, Loop B = EIA3
TIA case I9C, Loop B = EIA4
TIA case I9C, Loop B = EIA5
TIA case I9C, Loop B = EIA6
TIA case I9D, Loop B = EIA1
TIA case I9D, Loop B = EIA3
TIA case I9D, Loop B = EIA4
TIA case I9D, Loop B = EIA5
TIA case I9D, Loop B = EIA6
TIA case I10A, Loop B = EIA1
TIA case I10A, Loop B = EIA3
TIA case I10A, Loop B = EIA4
TIA case I10A, Loop B = EIA5
TIA case I10A, Loop B = EIA6
TIA case I10B, Loop B = EIA1
TIA case I10B, Loop B = EIA3
TIA case I10B, Loop B = EIA4
TIA case I10B, Loop B = EIA5
TIA case I10B, Loop B = EIA6
TIA case I10C, Loop B = EIA1
TIA case I10C, Loop B = EIA3
TIA case I10C, Loop B = EIA4
TIA case I10C, Loop B = EIA5
TIA case I10C, Loop B = EIA6
TIA case I10D, Loop B = EIA1
TIA case I10D, Loop B = EIA3
TIA case I10D, Loop B = EIA4
TIA case I10D, Loop B = EIA5
TIA case I10D, Loop B = EIA6
TIA case I11A, Loop B = EIA1
TIA case I11A, Loop B = EIA3
TIA case I11A, Loop B = EIA4
TIA case I11A, Loop B = EIA5
TIA case I11A, Loop B = EIA6
TIA case I11B, Loop B = EIA1
TIA case I11B, Loop B = EIA3
TIA case I11B, Loop B = EIA4
TIA case I11B, Loop B = EIA5
TIA case I11B, Loop B = EIA6
TIA case I11C, Loop B = EIA1
TIA case I11C, Loop B = EIA3
TIA case I11C, Loop B = EIA4
TIA case I11C, Loop B = EIA5
TIA case I11C, Loop B = EIA6
TIA case I11D, Loop B = EIA1
TIA case I11D, Loop B = EIA3
TIA case I11D, Loop B = EIA4
TIA case I11D, Loop B = EIA5
TIA case I11D, Loop B = EIA6
TIA case I12A, Loop B = EIA1
TIA case I12A, Loop B = EIA3
TIA case I12A, Loop B = EIA4
TIA case I12A, Loop B = EIA5
TIA case I12A, Loop B = EIA6
TIA case I12B, Loop B = EIA1
TIA case I12B, Loop B = EIA3
TIA case I12B, Loop B = EIA4
TIA case I12B, Loop B = EIA5
TIA case I12B, Loop B = EIA6
TIA case I12C, Loop B = EIA1
TIA case I12C, Loop B = EIA3
TIA case I12C, Loop B = EIA4
TIA case I12C, Loop B = EIA5
TIA case I12C, Loop B = EIA6
TIA case I12D, Loop B = EIA1
TIA case I12D, Loop B = EIA3
TIA case I12D, Loop B = EIA4
TIA case I12D, Loop B = EIA5
TIA case I12D, Loop B = EIA6
Chars (B)
Chars/Sec (B)
Seconds (B)
% Complete (B)
Connect Response B
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
131072
2.40E+02
546
100
2400
www.clare.com
2420RD Designer’s Guide
V.22bis North American Embedded Modem
Clare Worldwide Offices
AMERICAS
EUROPE
ASIA PACIFIC
Clare Headquarters
78 Cherry Hill Drive
Beverly, MA 01915-1048
Tel: 1-978-524-6700
Fax: 1-978-524-4700
Toll Free: 1-800-27-CLARE
European Headquarters
CP Clare nv
Bampslaan 17
B-3500 Hasselt (Belgium)
Tel: +32-11-300860
Fax: +32-11-300890
Clare Switch Division
4315 Earth City Expressway
Earth City, MO 63045
Tel: 1-314-770-1832
Fax: 1-314-770-1812
France
Lead Rep
99 route de Versailles
91160 Champlan
France
Tel: +33-1-69-79-93-50
Fax: +33-1-69-79-93-59
Asian Headquarters
Clare
Room 1016, Chia-Hsin, Bldg II,
10F, No. 96, Sec. 2
Chung Shan North Road
Taipei, Taiwan R.O.C.
Tel: 886-2-2523-6368
Fax: 886-2-2523-6369
Clare Micronix Division
145 Columbia
Aliso Viejo, CA 92656-1490
Tel: 1-949-831-4622
Fax: 1-949-831-4628
SALES OFFICES
Eastern Region
Clare, Inc.
603 Apache Court
Mahwah, NJ 07430
Tel: 1-201-236-0101
Fax: 1-201-236-8685
Central Region
Clare Canada Ltd.
3425 Harvester Road
Suite 202
Burlington, Ontario L7N 3N1
Tel: 1-905-333-9066
Fax: 1-905-333-1824
Western Region
Clare. Inc.
1852 West 11th Street #348
Tracy, CA 95376
Tel: 1-209-832-4367
Fax: 1-209-832-4732
Canada
Clare Canada Ltd.
3425 Harvester Road
Suite 202
Burlington, Ontario L7N 3N1
Tel: 1-905-333-9066
Fax: 1-905-333-1824
Page 13 of 13
Germany
ActiveComp Electronic GmbH
Mitterstrasse 12
85077 Manching
Germany
Tel: +49-8459-3214 0
Fax: +49-8459-3214 29
Italy
C.L.A.R.E.s.a.s.
Via C. Colombo 10/A
I-20066 Melzo (Milano)
Tel: +39-02-95737160
Fax: +39-02-95738829
Sweden
Clare Sales
Comptronic AB
Box 167
S-16329 Spånga
Tel: +46-862-10370
Fax: +46-862-10371
United Kingdom
Clare UK Sales
Marco Polo House
Cook Way Bindon Road
Taunton
UK-Somerset TA2 6BG
Tel: +44-1-823 352541
Fax: +44-1-823 352797
http://www.clare.com
Information contained in this
document is provided in
connection with Clare Inc.
(Clare) Products and is
believed to be accurate and
reliable. However, Clare
assumes no responsibility for
this material’s use, errors or
emissions or for any
infringements of patents or
rights of third parties which may
result from its use. These
materials are provided “as is”
without warranty of any kind,
either expressed or implied.
No license is granted by
implication or otherwise under
any patent or patent rights of
Clare.
Product names or services
mentioned in this publication
are for identification purposes
only, and may be trademarks of
third parties. Third party
names, brands, and marks are
the property of their respective
owners.
Clare’s products are not
intended for medical
implantation or other direct life
support applications where
malfunction may result in direct
harm, injury or death to a
person.
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