If a misbehaving cable modem stays online, how does the CMTS know which modem to use for the updated Timing Offset?
• A. The CMTS uses the capacity value (max-delay) because it can not really know. However, now that the code bases the timing offset calculation on the initial ranging, this is much less of a problem. This means that when the modems first come online with their initial maintenance, the CMTS logs all of the Timing Offsets and sets the Dynamic Map Advance based on the largest Timing Offset logged. Even if some modems increment, the Dynamic Map Advance still stays at the original Timing Offset. The CMTS updates its Dynamic Map Advance for that particular upstream only when new modems that have a larger Timing Offset come online.
