To: Gary Jacobs who wrote (22911 ) 8/22/1998 10:44:00 PM From: Bird Read Replies (3) | Respond to of 50264
Gary Jacobs wrote: >tell the indonesians they need cable installations to get low-cost phone service. >you big goof. There is no need to tell them, Believe it or not, it is much easier and requires less maintenance long-term to install the necessary fibre-optic hubs for the odd phone-booth in the more remote areas of third world nations. The urban areas comprising the lucrative long distance calls currently have cable TV service easily adaptable for ISP service. The alternative is the cost-prohibitive measure of repair/upgrade upon the antiquated PSTN analog equipment most manufacturers will soon stop making components for. IP-Telephony is about the future, not the past, this pertains to the concept and hardware. The 'translation' of voice to data requires a sophisticated mathematical formula that compresses the vast amount of data needed to represent the rich tones of the human voice into a much smaller, more manageable collection of data. A similar formula needs to expand that compressed collection of data back into its original size at the receiving end, too. The mathematical formulae that do this work of compression and decompression are collectively called a CODEC -- for encoder-decoder.One of the greatest technical challenges of IP telephony is to do all of the heavy mathematical lifting of compression and decompression in a very small fraction of a second. Any longer creates a noticeable delay in the IP voice conversations. Getting the necessary speed from 50 year old PSTN networks is the weak link in Digitcom's plan; and represents and insurmountable hurdle. Therefore, linking IP-Telephony through ISP's is the only logical way to avoid compression/decompression delay, and leaves Digitcom, through it's reliance on existing PSTN's, with an inferior technology. Bird (perched on the last phone line)