Network configuration 39Network configurationSet up the system clock1 Specify the system reference clock by entering one of the following commands:CLK:L for looping the network receive timingCLK:I for using the IDSU internal oscillatorAlways use the loop timing option if the network receive signal supplies timing.There should only be one timing source in the T3 or E3 circuit.The default is loop timing.Specify the network type and framing2 Specify your network type and framing as one of the following. The type andframing must match your network signal.NM13 for T3 M13 framingNCBT for T3 C-Bit Parity framingNE3 for E3 framingThe default is T3 M13.Specify transmit output level3 Set the transmit output level as follows:NLO for cabling distances less than 450 feetNHI for cabling distances of 450 feet or greaterThe default is NLO (no amplification).Specify transmit line build out (T3 only)4 Set the transmit line build out as follows:LBO:IN for cabling distances less than 225 feetLBO:OUT for cabling distances of 225 feet or greaterThe default is LBO:OUT (no line build out)You can only set this parameter if the network is set to T3; E3 line build out is alwaysset to out.