SLIC Protection for RJ11 Ports in IP-PBX ITU-T Solution Solution Products TBU-PL060-200-WH Objective Compliance The SLIC (Subscriber Line Interface Circuit) provides all of the BORSCHT functions such as battery, ringing and supervision between the codec and telephone handset. This PortNote® Solution discusses negative battery voltage solutions against surge and power contact threats. ITU-T Basic K.20, K.21, K.45. • 230 Vrms, 23 A, 900 seconds withstand. • Increased surge withstand to 4 kV 10/700 µs without a primary protector. Solution TISP4500H3BJR 1 TBU® High-Speed Protector: TBU-PL060-200-WH 2 Thyristor Surge Protectors: TISP4500H3BJR Alternate Recommendations Other PortNote® Solutions: • Dual Supply Voltage SLIC Protection - ITU-T Solution • Negative Battery Voltage SLIC Protection GR-1089-CORE Intra-building Solution • SLIC Protection - GR-1089-CORE Intra-building Solution Benefit This solution provides a high level of protection in a small PCB area. GND VDD SLICTip Tip TISP4500H3BJR SLIC RJ11 TBU-PL060-200-WH* TISP4500H3BJR Design Kit SLICRing Ring VSS -VBAT 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-49 *Note: The VE950 series (e.g., Le9500, Le9520, Le9530, Le9540) require a 200 mA Itrigger TBU® High-Speed Protector (HSP) for normal operation. All other SLICs may use 100 mA Itrigger TBU® HSP devices. Americas: Tel +1-951 781-5500 Fax +1-951 781-5700 EMEA: Tel +36 88 520 390 Fax +36 88 520 211 Asia-Pacific: Tel +886-2 256 241 17 Fax +886-2 256 241 16 COPYRIGHT© 2015 • BOURNS, INC. • 4/15 • e/K1519 • “PortNote” is a registered service mark of Bourns, Inc. “Bourns” and “TBU” are registered trademarks of Bourns, Inc. in the U.S. and other countries. Bourns® PortNote® Solutions provide protection recommendations for typical port threats. For more information, go to: www.bourns.com or email: [email protected]