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To: Ramsey Su who wrote (12048)	7/5/1998 2:24:00 PM
From: Jon Koplik	Respond to of 152472

Ramsey - someone already posted more or less the same news. Jon.

To: Ramsey Su who wrote (12048)	7/5/1998 3:54:00 PM
From: Greg B.	Respond to of 152472

Ramsey, One might infer that the 13 kbps vocoder might be a cousin to the vocoder that will be used in the GSM-CDMA overlay, based on this description: Call Clarity - Due to vocoders and robust network design, call clarity is another key benefit of the GSM-CDMA system. Utilizing innovative digital voice coding techniques, CDMA's 13 kbps PureVoiceT variable rate vocoders ensure superior voice clarity and quality while virtually eliminating background noise-even in congested urban locations. Several features of CDMA technology results in a very robust network with high call clarity. These features include rake receivers which combine calls from multiple paths, soft handoff, and power control. The Executive Summary of Economic Study reads: We then compared a second set of solutions that includes: - The "GSM Enhanced Capacity" solution - An enhanced IS95 solution (at 13kb/s and 8kb/EVRC) that will be available in 1999. This "enhanced IS-95" solution will result in doubling of the number of concurrent users per radio channel. This solution is referred as the "GSM-CDMA enhanced 13kb/s" when used with a vocoder rate of 13kb/s and as the "GSM-CDMA enhanced 8kb/s" for a vocoder rate of 8kb/s (EVRC). And it seems like the overlay can be modified for GSM-TDMA services: Differentiated GSM-TDMA and GSM-CDMA Services - Different services can be offered to different market segments and add benefits to customers... Based on a reference to MobileOne, it seems that the GSM-CDMA overlay marketing material was adapted from information sent to MobileOne, which as well all know, has since expressed the desire to test the overlay. Greg B.