Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : The New Qualcomm - a S&P500 company -- Ignore unavailable to you. Want to Upgrade?

To: gdichaz who wrote (9211)	4/25/2000 1:06:00 PM
From: Eric L	Read Replies (1) \| Respond to of 13582

Chaz, << WCDMA (a.k.a. DS) is freestanding - backwardly compatible to nothing. >> I am under the impression that just as 3GPP2 has been concerned with backward compatibility of cdma2000 with cdmaOne, 3GPP and the UMTS Forum has been highly focused on backwards compatibility of UMTS with GSM (and GPRS & EDGE). It is one reason that working the kinks out of 'Release99' is taking some time. Interoperability and backward compatibility with "the rest of the world" has been a design goal of DoCoMo's from the beginning of their initiative to combine the advanced capabilities of a cdma air interface with a GSM core network, so far as I know. (Just) one example here: After considerable discussion it has been agreed to use the "removable SIM-function" in the 3G environment. Mechanical and electrical details need to be studied further. It was decided that it is a requirement that a USIM (UMTS SIM) shall work in a 2G GSM only environment (both in a GSM-only terminal and a dual mode UMTS-GSM terminal). Agreed general principles include an aim to provide as much backward compatibility as possible. Thus new developments will have to be backwards compatible to earlier phases of GSM in order to ensure dual mode operation (UMTS-GSM), guaranteeing compatibility with existing equipment compliant with the specifications. Also, it shall be possible to insert a GSM card (SIM) into a UMTS terminal and access a UMTS system (if the operator allows access with SIM), and to insert a UMTS card (USIM) into a GSM terminal and access a GSM network without requiring an update of the GSM network's Network Elements, such as HLR and VLR to UMTS. 3gpp.org - Eric -