Section 5 User Interface Guide TRACER 4108/4208 System Manual52 © 2003 ADTRAN, Inc. 612804208L1-1B>T1X STATUS/CONFIGURATION/LOOPBACK > T1X LINE BUILD OUTConfigures the T1 for the appropriate line buildout, based on the distance to the T1 equipment. By default,the line buildout for the TRACER 4108/4208 is 0 dB/133 FT.>T1X STATUS/CONFIGURATION/LOOPBACK > ALARM REPORTINGDetermines whether the TRACER 4108/4208 unit will report active alarms. If set to D ISABLED, no alarms willbe displayed on this menu page. The A LARM R EPORTING parameter is independently configured for the localand remote TRACER 4108/4208 units. When set to D ISABLED, the front panel LED alarms are also disabled(OFF). By default, alarm reporting is set to E NABLED.>T1X STATUS/CONFIGURATION/LOOPBACK > SIGNALINGConfigures the framing format for the T1 link for both the local and remote TRACER 4108/4208 units. TheTRACER 4108/4208 transports T1 data across the link (as long as the T1 signal is properly timed). Configurethe framing format (using the S IGNALING menu) to enable the TRACER 4108/4208 to monitor incomingframing error events and indicate problems with the attached metallic service. The TRACER 4108/4208supports both extended superframe (ESF) and superframe (D4) framing formats. By default, the signalingmethod is set to ESF.>T1X STATUS/CONFIGURATION/LOOPBACK > LINE C ODESets the line coding for the T1 link. The TRACER 4108/4208 supports bipolar eight-zero substitution (B8ZS)and alternate mark inversion (AMI) line coding. By default, the line code is set to B8ZS.>T1X STATUS/CONFIGURATION/LOOPBACK > LOOP /N ORMAL STATEControls the loop status of the T1 link. Activates/deactivates loopback conditions for testing purposes.>T1X STATUS/CONFIGURATION/LOOPBACK > LOOP /N ORMAL STATE > N ORMALDefines the T1 link as normal data transport mode - there are no active loopbacks.>T1X STATUS/CONFIGURATION/LOOPBACK > LOOP /N ORMAL STATE > LINK [L OCAL ]Activates a loopback at the local TRACER 4108/4208 T1 framer towards the remote end of the wireless link(see Figure 9). Use the local L INK loopback to loop the data transmitted from the remote end of the link backacross the radio link to the remote end of the link. This loopback tests the integrity of the radio link and all theassociated digital and RF hardware.Figure 9. T1 Local Link Loopback