Cable telephony
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Cable telephony is a form of
Emergency calls
The biggest obstacle to cable telephone service is the need for nearly 100% reliable service for
Advantage
The biggest advantage to digital cable telephone service is similar to the advantage of
Disadvantage
One possible disadvantage to digital cable telephone service is similar to a disadvantage of cable Internet access, namely that the medium is shared, which could result in occasional delays and drops when high volumes of bandwidth are used or in some cases shared with entire neighborhoods. These delays could be experienced during the "prime time" parts of the day, when heavy Internet usage and Internet streaming devices can make telephone calls on this system difficult. However, by utilizing Cable Lab's Packet Cable interface specifications, cable operators are able to diminish the effects of heavy internet usage on call quality. This is done by way of QoS provisions present in the Packet Cable specifications.[2]
The second disadvantage it that this service requires power at the subscriber's end. In an emergency, if mains power is lost and without the