Where Do We Go from Here?
In this chapter we have looked at the essential facilities provided by DOCSIS modems operating on an HFC access network.
These facilities are available to all the traffic being handled by the modems. You have probably noticed that there was little specific mention of telephony in this chapter. However, most of the concepts we have examinedin particular the difficulty of obtaining guaranteed upstream bandwidth and the security applied to DOCSIS transmissionsare important grounding for understanding the design of the PacketCable telephony network.
In the next several chapters we will examine how the facilities provided by DOCSIS modems are used as an integral part of a fully fledged telephony network capable of providing high quality and advanced services to large numbers of subscribers.