IP Centrex is a service where the call platform and PBX features are hosted at the service provider location. The business end users connect via IP to the provider for voice service.

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.e4 Technologies - .e4 provides powerful, integrated IP Communications enterprise class services that provide the SMB customer to configure the exact voice, video, messaging and collaboration services they need in just minutes- all delivered on-demand.

CALL 877-434-VoIP

• 1 MONTH FREE TRIAL
• VoIP and PSTN Service
• PBX and ACD
• Web, Audio & Video Conferencing
• Skills Based Routing
• Private/Encrypted and Public IM
• Voice and Data Archiving
• Reporting and Archiving
• PSTN Gateway
• SIP Hardware Compatibility
• CRM Integration
• Web Contact Center

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Ip-Pabx.com IP-Pabx.com - First of its kind Hosted IP Based Pbx system offering from A-Z Solution from one provider. Totally Hosted Web Based Pbx System, Very Low priced starting 199$. You place an order, choose your Country Code and Area code for your incoming lines, choose extension quantity, They ship you pre programmed 99$ ip phones, you plug them on the internet, and wala, you have a pbx system up and running. the extensions can be anywhere in the world, and they will work fine. visit the web site for demo, or email us for a free test account. You get Voice Mail, Fax to Email, Web Voice Mail, Call Recording, 20 IVR's. API to integrate your own applications.
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OnSIP Virtual PBX (a.k.a. IP Centrex) by Junction Networks, the IP communications veterans.

OnSIP has been recognized by INC. Magazine, Voip-News, Internet Telephony and others as a leading service for business communication.

Ted Stevenson of VoIP Planet called it “a pretty eye opening solution that moves business telephony into a very new place.”

The most popular package for $99 / month includes all the features needed for a 25 person company!

This IP Centrex Service features:

• No cost per seat or user, pay only for usage of features and minutes
• No cost for rarely used conference room and lobby phones
• Mobile office connectivity – register any number of phones to ring simultaneously for the same extension
• Use any SIP phones or soft phones
• All you can eat conference bridge
• Free extension to extension calls
• No hardware to buy or manage
• Free internet to internet calls
• Easy 10 minute setup
• Firefox plugin for one-click calling and website click to call are free add-ons
• No contracts, there are many free trial options available

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MERA IP Centrex is an ideal hosted solution for small and medium-sized VoIP providers.

This product offers the following feature set:

• ANY-to-ANY codec conversion for seamless interoperability of terminal equipment
• RADIUS AAA for communication with external billing systems
• Partitioning capability to create multi-layer switch partitions and rent them out to sub-providers
• User – friendly WEB interface for flexible system management and configuration by the system administrator and subscribers
• Compatibility with standard hardware of all well-known vendors to reduce the system’s total cost of ownership and maintenance
• Unlimited scalability for gradual capacity growth to meet communication needs of users

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Sonetel A free, global phone system for small and medium sized companies worldwide. This is a free IP-centrex service that can be connected to any phone company.

This product offers the following feature set:

• Free Windows plug'n play softphone/client with HD voice (any other SIP phones can be used also)
• Unlimited users worldwide
• Unlimited on-net calling for free within the solution, and to any SIP-destination
• Connect to one or more phone companies of your choice (free) - or use Sonetel's add-on services for phone numbers and low-cost calling to mobile phones/landlines
• Call forward to SIP/PSTN/Extension on no answer
• Call transfer
• Call forking to all devices of each user
• Presence
• Chat
• For more details see www.sonetel.com

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Star2Billing S.L. - Star2Billing offers an IP-Centrex solution for VoIP service providers who wish to sell hosted PBX services to their customers. When combined with A2Billing, billing is available as well with termination and Least Cost Routing.
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Vidanetwork Global Office offers premium hosted PBX services to small and medium sized businesses. Global Office offers all of the advanced features of Hosted PBX services including:

• Free calls between extensions by 3-digit dialing.
• Pay-as-you-go Long Distance and International calling at the lowest rates.
• Self-management web interface to manage your PBX extensions, configure IVR, ACD queues and generate reports.
• Local or toll-free numbers from USA, Canada, China, UK and other countries.
• Voicemail, call recording, BLF, call monitoring tools and all other features.
• Hosted CRM integrated with your Global Office.
• Connect your own SIP devices, soft phones or download our free VoicePal app to your Android devices as your PBX extensions.
• Online Sign Up, instant activation!
• USA based supports, no contract.

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See also

• http://www.ip-centrex.org/ for more info.
• NetFuse - IP PBX/IP Centrex Provider
• Kancharla - supplier of IP Centrex solutions
• Asterisk - Open Source PBX
• Hosted PBX - Same As IP Centrex Service, Where the call platform hosted on high Speed Network.
• Hosted PABX
• IP PBX
• http://www.vidanetwork.net/ for more about hosted and on-premise solutions.
• Database Systems Corp. IVR solutions and IVR hosting
• PBX Features