
358 ◾ IP Communications and Services for NGN
certain situations, both broadband access techniques will coexist at the customer
and homefronts.
For economic reasons, FTTC can be used up to a few tens of meters to the house
or business, and the remainder of the distance is covered by xDSL, as in Figure 19.14.
e rest of the distance to the home is cable or carrier-grade Ethernet.
Multicasting of IPTV
IPTV is clearly a service that requires a lot of bandwidth and is delivered to many
users through multiple paths. is makes it difficult to offer if broadcasting is not
used because the bandwidth requirement is enormous. Delivery of IPTV is done
using ...