TITLE

Lessons - Learned from Cable's IP Telephony Front

PUB. DATE
November 2004
SOURCE
Communications Technology;Nov2004, Vol. 21 Issue 11, Real VoIP. p3
SOURCE TYPE
Trade Publication
DOC. TYPE
Article
ABSTRACT
The article focuses on the implementation aspects of cable's internet protocol (IP) telephony. Capital expenditure (CAPEX) and operating expenses (OPEX) can be lowered if voice over internet protocol (VOIP) is introduced in areas with a high density of cable modem transmission systems (CMTs) and cable modems. Cable operators have the opportunity to leverage the robustness of the IP network to provide multimedia services. Operators must make certain assumptions about take rates, growth rates and the ratio of on/off-net calls. SS-7 signaling transport costs can be lowered by designating the same location as the public switched telephone network (PSTN) handoff point and the SS-7 handoff point. Technology choices include discrete softswitching and integrated switching. Discrete softswitching is the choice from a CAPEX perspective when initial take-rate projections are fewer than 5,000 lines at 0.137 Erlang each with media gateway requirements of one DS-3 or less. When calculating expenditures, operators should invest in a comprehensive test system that includes proactive maintenance and monitoring.
ACCESSION #
15164545

 

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