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(R) 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 s without a primary protector. Solution TISP4500H3BJR 1 TBU(R) High-Speed Protector: TBU-PL060-200-WH 2 Thyristor Surge Protectors: TISP4500H3BJR Alternate Recommendations Other PortNote(R) 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(R) High-Speed Protector (HSP) for normal operation. All other SLICs may use 100 mA Itrigger TBU(R) HSP devices. Americas: EMEA: Tel +36 88 520 390 Fax +36 88 520 211 Asia-Pacific: Tel +1-951 781-5500 Fax +1-951 781-5700 Tel +886-2 256 241 17 Fax +886-2 256 241 16 COPYRIGHT(c) 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(R) PortNote(R) Solutions provide protection recommendations for typical port threats. For more information, go to: www.bourns.com or email: protection@bourns.com Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Bourns: PN-DESIGNKIT-49