Chapter 3. Operation36 NxT1 HSSI/V.35 Module User Manual 61200771L1-1C ONFIGRead Security: 5; Write Security: 5Contains parameters to include T1 data streams to the HSSI interface.P RTDisplays the port number for the T1s mapped to the NxT1 HSSIinterface. Ports 1 through 4 are the T1 interfaces located on theNxT1 HSSI Option Module. Ports 5 through 8 are T1s mapped tothe NxT1 HSSI Option Module in the Dedicated Maps.G ROUP A SSOCIATIONAssociates T1s (either mapped to this card and/or the on-board T1s)with the HSSI interface data stream. To add the T1 to the datastream, select the G ROUP 1 option.S CRAMBLEEnabling the S CRAMBLE option configures the NxT1 HSSI Moduleto prevent ones density violations when transmitting ADTRANIMUX headers on a T1 circuit with AMI line coding.HSSI M ENUS Read Security: 5Provides status, configuration, and testing parameters for the 50-pin SCSI-II HSSI interface.S TATUSRead Security: 5Displays the current loopback status of the HSSI interfaceL OOPBACKDisplays the current loopback status of the HSSI interface. The fol-lowing loopback options are possible (see Figure 3-4 on page 37):L OCAL DTE LOOPBACKA local DTE loopback occurs at the DTE port of the DCE, and isused to test the link between the DTE and DCE (NxT1HSSI mod-ule).L OCAL LINE L OOPBACKA local line loopback occurs in the IMUX engine and is used to testfunctionality between the DTE and the IMUX engine.R EMOTE L INE L OOPBACKA remote line loopback occurs at the T1 interface and is used to testfunctionality between the DTE and the T1 interfaces.Use extreme caution when disabling the S CRAMBLE option. ADTRAN recommendsenabling the SCRAMBLE option for normal use.