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Free IP PBX

Free SIP IP PBX contents Asterisk PBX Asterisk® is a complete IP PBX in software. It runs on a wide variety of operating systems including Linux, Mac OS X, OpenBSD, FreeBSD and Sun Solaris and provides all of the features you would expect from a PBX including many advanced features that are often associated with high end (and high cost) proprietary PBXs. Asterisk's architecture is designed for maximum flexibility and supports Voice over IP in many protocols, and can interoperate with almost all standards-based telephony equipment using relatively inexpensive hardware.   Trixbox IP PBX System trixbox is a telephony application platform based on Asterisk™ Open Source PBX Software. The trixbox application platform makes it fast and simple to install and configure your business-class telephony system. With unlimited extensions, voicemail-to-email, music on hold, call parking, analog lines or high density T1/E1 circuits and many other features, trixbox provides all the functionality your business needs. trixbox brings big business PBX features to small and medium-sized businesses.   sipX sipX is the leading open source IP PBX in terms of scalability, robustness and ease of use. The sipX IP PBX has been successfully deployed in a lot of places. The largest known installation serves more than 5,000 users connected to one redundant (HA) system. Small installations go all the way down to a few users served by very low cost hardware.                          PBX Featues explained :     * Account Code: Account code for dialing calls     * Alternate Number Ring: Assign a different number to same line that rings with a different cadence     * Attendant: Main Operator extension     * Automatic Attendant     * Automatic Line Selection     * Automatic Hold     * Automatic Redial     * Automated directory: Automatically connect to an extension by name     * Automatic Call Distribution: ACD     * Barge-In: Allow an extension to break into a call at another extension     * Billed Calls Only: Outgoing calls must be collect or 3rd-party billed     * Boss-secretary functions: The boss'es phone and the secretary's phone are linked togheter     * Busy Ring     * Call Back     * Call Forwarding: Redirects all incoming calls towards other extension     * Call Monitoring     * Call Recording     * Call Return: ??     * Call Through: Service for savings on local interconnect charges     * Call Transfer: Hand a call off to another extension     * Call Trace: mark a call in system logs as requiring tracing or special attention     * Call Park: Place a call on hold and allow anyone to dial an extension and take the call     * Call Pickup: Take a parked call off hold     * Call Waiting: Receive a tone indicating another call is waiting for attention     * Calling ID: Identify (or block identification) of caller's phone number or phone number and name     * Calling Plans     * Camp On     * Conference Call: Allow 3 or more parties to connect together     * Consultation Hold: Allow caller to be put on hold while user calls another extension     * PBX Custom Greeting: Change announcement according to special criteria     * PBX Custom Menus: Customized option menus for an automated attendant     * Device Inventory     * PBX Direct Inward System Access: In short: DISA     * Direct Line or HOT line: off-hooking your phone sends your call directly to another extension (might be the operator)     * Disable Call Waiting: Prevent call waiting for one call     * Do Not Disturb: In short: DND     * Extension Dialing: Dial a number on the system with only 1, 2, 3, 4 or 5 digits     * Extension Mobility: Sometimes known as extension roaming     * Failure Alarm: Rings a remote alarm if the PBX fails     * Fax on Demand: Allow the user to be given a fax     * Follow Me: have calls automatically transferred elsewhere     * Forward on Busy/No Answer transfer if line is in use or doesn't answer     * Hunt Groups: transfer a busy number to another extension     * PBX Hold: Allow a call to be kept in the system when hanging up     * Incoming Only: Line cannot dial out     * Incoming Queue: Place incoming calls in a wait list to be answered     * intercom: solves the problem of yelling to your secretary thru the wall.     * Last Number Redial: dial a code to call the last (regular) number dialed     * Least Cost Routing: routes calls from fixed-to-mobile via cheaper mobile-to-mobile calls.     * ((PBX Location-Based Routing|Location-Based Routing}}: Route an incoming call dependent on where the caller is     * Message Waiting Indicator: MWI     * Mobility Extension (Mobex): for connecting mobile phones and other external telephony devices to the PBX.     * Music on Hold: play music or a recording while the caller is on hold     * Night Answer: change where calls go if line is placed in 'night service'     * Non Supervise: Line that can answer without giving supervision allowing a non-charged call.     * Outgoing Only: Line cannot receive calls     * Override Line: Allow a higher-priority user to seize use of a trunk for outgoing call     * performance measurements     * Restricted extension: Extension cannot be dialed from outside line or some or all inside extensions     * Public Address     * Sieze Call: Allow an extension to take a call from another extension and disconnect the other extension     * Series Completion     * Skill Based Routing     * Speed Dial: ??     * Three Way Calling     * Toll Restriction: Limit calls to certain numbers     * Voice Messaging: voice mail and give greeting / announcements     * Voice Broadcasting: Send recorded phone messages     * Visual Phone Dialer: Visual interface for handling, viewing and monitoring all desk phone call activity from the PC     * Voice Portal:     * Wake-up Call: Have user receive a reminder call     * Web-Based MACs