Released on = June 14, 2007, 1:21 am

Press Release Author = 3CX

Industry = Software

Press Release Summary = Certified interoperability means customers can confidently
pair the 3CX Phone System for Windows with Grandstream SIP-based products to provide
a complete PBX replacement

Press Release Body = Miami, Florida and Stockholm, Sweden - 14 June 2007 - 3CX
(www.3cx.com), developer of the leading windows based IP PBX 3CX Phone System, and
Grandstream Networks, Inc. (www.grandstream.com), a leading designer and
manufacturer of next generation IP Voice and Video products for broadband networks,
announced today the two firms have completed interoperability testing between 3CX
Office Phone System for Windows and Grandstream SIP based products - including the
GXP Series, the BT Series, the HT ATA Series, and the Analog FXO Gateway Series.
This interoperability ensures that the SME customer will always have the
best-in-class, affordable VoIP solution when pairing 3CX's software-based IP-PBX for
Windows with Grandstream's SIP-based products.

"This partnership is great news for both 3CX and Grandstream, but above all for
small and medium-sized businesses, that can now confidently implement a complete IP
PBX solution with 3CX Small Business Phone System software and Grandstream
equipment. The combined solution is very easy to use and cost effective and fully
supported by both vendors.\" said Nick Galea, 3CX CEO.

"We are pleased to complete interoperability testing between our award-winning
products and 3CX Small Business PBX for Windows. The combination of the 3CX
software-based IP-PBX and our best-in-class product portfolio creates an excellent
value and innovative solution for the SME market," said David LI, CEO of Grandstream
Networks.

Grandstream products are based on SIP standard and offer broad interoperability with
most 3rd party SIP products. Each product line is feature rich with superb audio
and video quality, and is easy to manage through web browser and automated secure
provisioning. Grandstream SIP Phones support multi-line conferencing, voicemail,
and advanced telephony features including call waiting, call park, call transfer,
hold and mute. The BT Series is a single line SIP phone designed for the
residential and SoHO markets.

The GXP Series includes two models - GXP2000 (4-lines) and the GXP2020 (6-lines).
The series offers power-over-Ethernet (P-o-E), dual 10/100 auto-sensing Ethernet
ports, individual SIP account/line and XML capabilities. The GXP Series is
expandable using a 56 button expansion car, offers MLS (multi-language support) in 6
languages, AES encryption and remote configuration for quick deployment over a large
network.

The HandyTone ATA Series includes five (5) products and offer a highly affordable IP
solution for the home or remote office. The GXW410x FXO Gateway is available in 4
or 8 port models and supports up to 3 SIP account profiles, 1 or 2-stage dialing,
caller ID, T.38 fax, programmable PSTN line settings for various different
countries/regions, and comprehensive codec support. The GXW410x analog gateway
allows any business to seamlessly connect multiple locations with up to 8 PSTN
lines, to an IP PBX system.

Grandstream products are available through Grandstream's distribution channels
worldwide. More information is located on the World Wide Web at
www.grandstream.com.

3CX Small Business Phone System for Windows and Grandstream gateways and phones
allow businesses of all sizes to easily implement a complete telephone system. The
solution is more manageable and scaleable then traditional PBXs since its software
based. Lines and extensions can be added simply by adding more Grandstream SIP
phones or gateways. The complete solution also cost a fraction of traditional PBXs,
whilst having more features. 3CX Phone System is also available as a free edition.
More information about 3CX Phone System can be found here www.3cx.com/phone-system.

About Grandstream
Grandstream Networks is an award-winning designer and manufacturer of next
generation IP voice & video products for broadband networks. Grandstream's products
deliver superb sound and picture quality, rich telephony features, full compliance
with industry standards, and broad interoperability with most service providers and
3rd party SIP based VoIP products. Grandstream is consistently recognized in the
VoIP industry for their innovation, affordability and superior value in their
products. Grandstream Networks is a private company headquartered in Brookline, MA
with offices in Los Angeles, Dallas and China. For more information, please visit
www.grandstream.com.

About 3CX
3CX offers a fully featured FREE IP PBX with no time outs that is supported via the
3CX forums. Take the product tour at
http://www.3cx.com/phone-system/product-tour.html. 3CX is a privately held company
with a management team backed by years of experience in developing and selling
network infrastructure software. 3CX maintains a global presence by maintaining a
localized website for all major countries with information available in German
(http://www.3cx.de), Spanish (http://www.3cx.es), French (http://www.3cx.fr),
Portuguese (http://www.3cx.com.br), Vietnamese (http://www.3cx.vn), Japanese
(http://www.3cx.jp), Traditional Chinese (http://www.3cx.hk) Simplified Chinese
(http://www.3cx.cn) and Korean (http://www.3cx.co.kr).

All product and company names herein may be trademarks of their respective owners.

Web Site = http://www.3cx.com/news/3cx-grandstream.html

Contact Details = For more information contact:

Grandstream Networks Contact:
Marianne Rocco
(617) 566-9300
mrocco@grandstream.com

3CX Contact:
Tamara Borg
800-687-0903
tamara@3CX.com