19Table 27 LED descriptionLED DescriptionLINK• Off: The link is idle.• On: The connection has been established.• Flashing: The connection is being set up.ACT • Off: The link is idle.• Flashing: Data is being transmitted or received.Interface cables and the connection methodsFor more information about the Ethernet interface cables and the connection methods, see"ADSL/BS/FXS/FXO/AM/FCM interface."XDSL interface module• SIC-1ADSL• SIC-1ADSL-ISIC-1ADSLIntroductionThe 1-port ADSL over PSTN interface module (SIC-1ADSL) provides an RJ-11 interface that canwork as a WAN interface. It allows a LAN subscriber to connect to the digital subscriber's loopaccess multiplexer (DSLAM) at the central office over a regular analog subscriber line or telephoneline. Thus, the subscriber can access the ATM/IP backbone or the Internet to enjoy services such ashigh-speed data communication and video on demand (VoD).ADSL transmits data in the high frequency band above 26 kHz. Therefore, it can provide serviceswithout interfering with the voice service being provided in the low frequency band (0 to 4 kHz) on thesame line. It provides downlink rates in the range 32 kbps to 8 Mbps and uplink rates in the range 32kbps to 1 Mbps.The SIC-1ADSL delivers these features:• Manual ADSL line activation and deactivation, providing a convenient fault location means.• Interface standards of G. DMT, G. Lite, and T1.413, autosensing.• Trellis coding (except for G. Lite) on ADSL interfaces, enhancing the stability of ADSLconnection.
