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RJ11 Fax/Modem (FXO)
Solution Products
TISP4350T3BJR-S
Objective
In telecommunications, foreign exchange
office (FXO) designates a telephone
signaling interface that receives plain old
telephone service (POTS). This solution
protects those interfaces against surge and
power contact threats.
Solution
1 Thyristor: TISP4350T3BJR-S
1 Telecom Fuse: B1250T
Compliance
ITU-T K.21, IEC 60950, UL 60950 and TIA-968A
Alternate Recommendations
The TISP4310T3 should be considered for some “B”
type ringers or for ITU-T Enhanced testing; consult
with your local Bourns representative.
Benefit
This solution provides a high level of protection
within a small amount of PCB area.
1 Diode Bridge: CD2320-B1600
B1250T
Solid-State
Hook Switch
CD2320-B1600
Modem
CD2320-B1600
B1250T
RJ11
DAA
Design Kit
TISP4350T3BJR-S
The schematic above illustrates the application protection and does not constitute the complete
circuit design. Customers should verify actual device performance in their specific applications.
PN-DESIGNKIT 8
Americas:
Tel +1-951 781-5500
Fax +1-951 781-5700
Bourns? PortNote? solutions provide protection
recommendations for typical port threats.
Europe: Tel +41-(0)41 768 55 55 Asia-Pacific: Tel +886-2 256 241 17
Fax +41-(0)41 768 55 10 Fax +886-2 256 241 16
COPYRIGHT? 2012 ? BOURNS, INC. ? 6/12 ? e/CPK1021 ? “PortNote” is a registered service mark of Bourns, Inc.
“Bourns” is a registered trademark of Bourns, Inc. in the U.S. and other countries.
For more information, go to:
www.bourns.com
or email: protection@bourns.com
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