Cannot recommend Grandstream
We used this and several other Grandstream voice and video phones for about a year before giving up on them. Grandstream phones are about the lowest cost IP phones available. They will work as a basic voip phone, for dialing and receiving calls. That is about all I can say that is positive about them. If you want to use ALL the latest VoIP and PBX features, Grandstream will leave you wanting. The firmware is buggy and features often don't work correctly.
Very affordable, Feature-packed
We were impressed with this phone, which is no surprise considering that we also liked the GXP 2020 when we reviewed it last year. The GXP 2100 does just about everything comparable VoIP phones from competing manufacturers can do at a fraction of the price.
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