GPRS Support for the K1205 Signaling Protocol Analyzer, making it ideal for robust monitoring for field applications. Manufacturers' specific Abis interface protocols are supported as well. The 2.5G technologies have been designed to extend the capabilities of existing 2G systems. The 3G technologies take that one step further, providing forward compatibility for many of the existing 2G and 2.5G systems while adding further capabilities to make these systems sustainable for the foreseeable future. In the US, on the other hand, multiple standards exist.
Licenses are for spectral bandwidth rather than technologies.
Therefore, network operators, whether they are using some version of TDMA or CDMA, will move to 3G, but will also wish to protect their installed networks. As they upgrade to 3G technology, they will want to be assured that the new networks are backward compatible with their original technology. The 3G segment shows some of the initial proposals for the worldwide standard. Table 2 summarizes the characteristics of the 3G standards. Numerous proposals for IMT-2000 were developed, and it quickly became apparent that current operators would need a clear technology migration path to move from their existing networks to 3G networks.