Why are DECT 6.0 better than ISM phones?

Answer 1

DECT 6.0 is based completely on the European DECT standard over air protocol, within this standard the operating frequency of the equipment is specified to operate in North America within the 1910 - 1920Mhz frequency range. This frequency band is only available to other to other DECT and DECT like devices (PWT) that are specifically designed to co-exist with one another. The problem with phones operating in a ISM bands is that they don't only operate with other "phones" in the that same frequency range, they have to co-exist with many other device (WLAN, Baby Monitors, Walkie Talki's, Microwave ovens, etc) that operate in the same frequency band. While almost all ISM band phones are capable of some type of frequency or carrier hopping technique, the are more susceptible to interference due to the large number of devices relegated to this band, and not all devices in this band are the least bit concerned with interference that they might cause to a wireless phone. Another benefit that should exist for DECT, but is probably optional for implementation is General Acces Protocol (GAP) which allows for handset from any vendor to be associated to another vendors base, so adding a handset to a system does not require that you purchase from the same vendor. Additionally DECT provides the ability to increase your range by adding bases to your system, and supports active call handovers between bases assuming that part of their range overlaps. So covering much larger areas than a standard ISM band phone is possible. Now this is not to say that and ISM phone vendor can't do the same thing, but adherence to DECT 6.0 just means that you don't just have to hope that your vendor thought ever scenario through in their own implementation