75Interface LEDsFigure 81 MIM-1CT3 panelTable 102 LED descriptionLED DescriptionLINK/ACT• On: The carrier signal has been received.• Off: No carrier signal has been received.• Flashing: Data is being transmitted or/and received.LP/AL• On: The interface is in a loopback.• Off: No loopback or alarm is present.• Flashing: An alarm indication signal (AIS), loss of frame alignment (LFA)signal, or remote alarm indication (RAI) signal is present.Interface cables and the connection methodsFor more information about T3 interface cables and the connection methods, see "E3/T3 interface."xDSL interface module• MIM-1SHL-4W• MIM-1G.SHDSLMIM-1SHL-4WIntroductionThe 1-port dual-pair G.SHDSL interface module (MIM-1SHL-4W) adopts trellis coded pulseamplitude modulation (TCPAM) coding and provides symmetric rates up to 4.624 Mbps. Thetransmission rate of the interface can automatically adapt to line distances and conditions.Compared with ADSL, G.SHDSL allows farther transmission distance and thus has a widerapplication scope. It is an alternative to E1/T1 line for high-speed data service access. However, asTCPAM uses the band starting from 0 Hz for data transmission, G.SHDSL cannot share the sameline with POTS or ISDN like what ADSL has done.The MIM-1SHL-4W delivers these features:• Supporting manual G.SHDSL line activation/deactivation and easy-to-use fault location tools• Supporting G.991.2 interface standard and autosensing• Allowing you to set the dual-pair G.SHDSL interface to operate in dual-pair or single-pair mode
