PCM equipment (with 4 channel telephone and ethern

PCM equipment Product feature 1.High density single board design ,improve the dependability of system.supply the subcriber antipodal signals ,it is convinent for the user to charge accurately ,support caller identification. 2.supply 30 user interface ,made to measure various types of mixed insertion 1-3 channel user module for your free choice 3.independent user module design,can mixed insert according to user requirements. 4.various types of user interface ,can realize mixed insertion of voice data and image together. 5.centralized management system ,convinent for user to maintenance management. 6.19 inch 1U standard case structure ,save space Technical parameters E1 interface 1.bit rate : 2.048 Mbps ±50ppm 2. reference standard ITU-T G.703,G.704,G.712 3.circuity code type : HDB3 4.jitter transfer characteristics : ITU-T G..823 5.impedance : 75Ω( 120Ω optional ) 6.physical interface : BNC (RJ45) V.24 interface 1.interface type : V.24 asychronous 2.speed : 0-19.2Kbps V.35 interface 1.interface type : V.35 synchronous 2.speed : N*64Kb/s (N=1-15) 3.clock method : DCE 10Base-T interface 1.interface type : 10Base-T 2.interface rate : 10Mbps 3.Transmission rate : N*64Kb/s (N=1-15) 4.protocol : link layer bridging User interface type 1.FXO interface 2.subercriber line interface 3.two line EM interface 4. four line EM interface 5.RS232/V.24 interface 6.V.35 interface 7.10Base –T ethernet interface 8.G.703 64Kb/s the same direction of data interface 9.magnetic module interface User and loop interface 1.impedance : 600Ω 2.insertion loss : -3±0.75dB 3.frequency characteristics : 300 3400Hz(-0.6 =3dB) 4.weighted noise : 63.7 dB mop 5.Crosstalk attenuation : >65 dB 6.Loop impedance : <1800Ω Power 1.input : -48VDC (±20%) 2.allowable range of voltage fluctuation : -36V -72V 3.power consumption : <10W 4.Optional :220VAC 5.Optional :240VDC Environment requirement 1.operating temoerature : 0 degree to 4 degree 2.operating humidity : <90% Dimension This equipment adopt 19 inch standard casing Size : 260mm*480mm*44mm Two/four line audio interface 1.impedance :200Ω+680Ω 0.1μF 2.four line AD gain : 14dB 3.four line DA gain : -2 dB 4.four line AD frequency characteristics : -0.2-+0.2 dB 5.four line DA frequency characteristics : -0.2-+0.2 dB 6.two line AD frequency characteristics : -0.2-+0.2 dB 7.two line DA frequency characteristics : -0.2-+0.2 dB 8.return loss :40 dB 9.balance degree : 70 dB 10.common mode rejection ratio : 70 dB 11.power supply rejection ratio : 30 dB 12.idle channel noise : >65 dB 13.loop impedance : 600Ω Two/four line E&M interface 1.impedance :200Ω+680Ω 0.1μF 2.four line AD gain : 14dB 3.four line DA gain : -2 dB 4.four line AD frequency characteristics : -0.2-+0.2 dB 5.four line DA frequency characteristics : -0.2-+0.2 dB 6.two line AD frequency characteristics : -0.2-+0.2 dB 7.two line DA frequency characteristics : -0.2-+0.2 dB 8.return loss :40 dB 9.balance degree : 70 dB 10.common mode rejection ratio : 70 dB 11.power supply rejection ratio : 30 dB 12.idle channel noise : >65 dB 13.loop impedance : 600Ω