Chapter 3. Operation61200771L1-1 NxT1 HSSI/V.35 Module User Manual 35T X PRMControls the sending of performance report messaging (PRM) dataon the facility data link (FDL). The PRM data continues to be col-lected even if XMIT PRM is turned off (possible only with ESF for-mat). Choose either ON or O FF.LBOWrite security: 2; Read security: 5Selects the Line Build Out (LBO) for the network interface. TheLBO setting determines the amplitude of the transmitted signal.For short haul (intra-building) applications, choose from the ftoptions. For long haul (out of plant) applications, choose from thedB options. When you select this item, a list of choices displays.Select the appropriate option.T ESTWrite security: 3; Read security: 5These options initiate different types of tests and display test results.P RTDisplays the port number.L OC LBWrite security: 4; Read security: 5Causes loopback on near-end (local) port (see Figure 3-3). The fol-lowing options are available:Figure 3-3. T1 Loopback Test DiagramIMUX M ENUS Read Security: 5Contains the inverse muxing configuration parameters for the NxT1 HSSIOption Module.L INE Metallic loopbackP AYLD Payload loopback - framing andclocking are regeneratedT1 PortDS1NI CSUPayload LoopbackLine Loopback