Customer Premises Equipment ( CPE ) • Terminal Equipment • All Phones ( Cordless, Corded….etc ) • Modems ( 56k, xDSL, Cable ) • ISDN • VOBB ( Voice over Broadband ) • VOIP ( Voice over IP ) • VOCM ( Voice over Cable Modem ) • LAN RJ45 or RJ11 protection in Power Plug ( surge bar )
Central Office ( CO ) • Central office system • POTS linecard ( SLIC, Ring, LCAS protection ) • DSL linecard ( ADSL, VDSL, SHDSL ) • PBX – Private Branch Exchange
Typical CPE Typical CPE 461 Telecom Nano Fuse Bridge 1N4004 x 4 TIP Ring Voltage 0V P3100SB Hook Switch Ring Detector - 269 Vpk RING Note: In China domestic market, P2300SA is normally used. Sometimes the OC protector is neglected in the lines
Typical CO Lines Gas Plasma GDT Ring Relay SLIC GDT Protector Fixed Voltage Sidactor Battery Tracking Battrax Protector 461 Telecom Nano Fuse Legerity / Infineon SLICs Ring Generator + Battery Voltage
CPE Protector selection 1 Ring Voltage: • USA = 150 V r.m.s • Europe & Asia = 90 V r.m.s Battery Voltage • USA = - 56.6V • Europe & Asia = - 53V Max signal during ringing = Ring Voltage x 1.414 + Battery Voltage • USA = 269 V Max • Europe & Asia = 180 V Max
CPE Protector Selection 2 USA Market: • For Sidactor, Vdrm > 269 V ; P3100SB has Vdrm = 275V; P3100SB is OK. • For GDT, DC Sparkover Voltage > 269V ; 350V x 0.8 = 280V; 350V GDT is OK Europe & Asia: • For Sidactor, Vdrm > 180V ; P2300 has Vdrm = 190V; P2300SA is OK. • For GDT, DC Sparkover Voltage > 180V; 230V x 0.8 = 184V ; 230V GDT is OK
CPE Protector Selection 3 Rating of the protector: For USA: • Used with a fuse ( Telecom Nano 461 ) ; Sidactor “B” rating is OK ; P3100SB is OK. • Used with 7 ohm PTC ; Sidactor “A” rating is OK; P3100SA is OK. • Used with a fuse, Small rating 5kA GDT is OK; SL1002A350SM or SL1011A350 is OK
CPE Protector Selection 4 Rating of the protector For Europe & Asia • Used with fuse ( Telecom Nano 461 ) or PTC; Sidactor “A” rating is OK; P2300SA is OK. • Used with fuse or PTC, small rating 5kA GDT is ok; SL1002A230SM or SL1011A230 is OK • Note : The over current element should be able to pass relevant power cross test by different standards from different countries.