Chapter 5. Configuration Menu TSU LT User Manual46 © 2002 ADTRAN, Inc. 61202060L4-1Figure 5-4. DTE Clock SourceInternal TimingThe TSU LT is the source of timing. The TSU LT is configured to use its own internal oscillator asthe source of timing. Applications include private line driver circuits where one end is set to networkand the other to internal. See Figure 5-5.Figure 5-5. Internal Clock SourceBIT STUFFINGWhen enabled, Bit Stuffing causes the TSU LT to monitor for ones (1s) density violations and insert aone (1) when needed to maintain ones at 12.5 percent. This option should be disabled if B8ZS isenabled, if Nx56 is selected, or if alternate channels are being used. All of these other options alreadyensure pulse density requirements.Choices: ENA, DISA
