Very good sound quality
Where the KX-UT113 succeeds is where it actually matters: voice quality. The speaker phone is nice and crisp. It renders both speech and IVR menus quite well. It's no Sennheiser, but it's leagues ahead of the execrable speaker that came with our pre-production UT136. The distortion control kept everything smooth sailing even when we blasted music through one phone line to try to overdrive the phone's speaker.
Great work phone
The form factor of these phones are both visually appealing and physically comfortable to work with on a daily basis. We are using them for a Ring Central account and the setup was a breeze - even for the non-technical people. I would make one technical recommendation to purchasers: these do not come with a power supply. If you are a medium sized or larger office (not just 1 or 2 people), then I would recommend purchasing a POE switch to power the phones instead of the $15 power brick.
Excellent audio, quality Intuitive to use
The Cisco SPA504G is a very good phone. With HD voice supported, it delivers excellent voice quality in an intuitive and well-made piece of hardware. The OnSIP team is thrilled to see another manufacturer taking steps to bring HD voice to midrange phones that won't cost customers an arm and a leg.
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.
Quality entry level product
The Soundpoint 331, Polycom's new desktop phone, is a direct replacement for the Soundpoint 330, the brand's entry-level IP phone. The two phones are identical except that the 331 has additional memory to support future feature enhancing SIP software upgrades expected in late 2010. According to 888voipstore, the Soundpoint IP 331 is a "cost-effective solution for cubicle workers as well as call center operators who use a 'hard' phone in conjunction with a 'soft' client running on the PC".
Built-in volume controls and ringtones
Hawking Technology's Net-Talk is a USB "Internet phone," which is to say it's a phone for making VoIP calls with an existing Internet connection. The lightweight device is compatible with the four major instant messaging services that offer voice capability (AOL, Yahoo, MSN, and Google), but it's primarily designed to work with Skype.
Poor speakerphone quality
The Snom 320 is a 2-year old SIP business phone, and the middle tier in the company's 300 series. It has more features than the Snom 300 including additional line displays and a better semi-graphic LCD, but at a considerable price increase. The Snom 360 and 370 are even pricier still and have larger LCD screens, as well as another suite of features that are not included in the 320.
Very affordable - A lot of bang for your buck
The Grandstream GXP 2020 Enterprise SIP phone is in the company's GXP series of phones, a line that focuses on devices that are "feature rich, auto-provisionable for mass deployment, easy to use and competitively priced". The company specializes in very affordable VoIP equipment and the GXP 2020 is no exception. At around $80, this phone is probably one of the most affordable 'executive class' phones on the market.
Fantasic Polycom grade sound quality
If you use Skype (or any other softphone app) for business calls, the C100S is one investment worth making, especially if you value good quality calls and don't want the people on the other end of your call to think you are calling from underwater.
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Reviews and Ratings for 50 to 100 $ Prices IP Phones from ReviewGist