Copied from there website;
Call Features
* ADSI On-Screen Menu System
* Alarm Receiver
* Append Message
* Authentication
* Automated Attendant
* Blacklists
* Blind Transfer
* Call Detail Records
* Call Forward on Busy
* Call Forward on No Answer
* Call Forward Variable
* Call Monitoring
* Call Parking
* Call Queuing
* Call Recording
* Call Retrieval
* Call Routing (DID & ANI)
* Call Snooping
* Call Transfer
* Call Waiting
* Caller ID
* Caller ID Blocking
* Caller ID on Call Waiting
* Calling Cards
* Conference Bridging
* Database Store / Retrieve
* Database Integration
* Dial by Name
* Direct Inward System Access
* Distinctive Ring
* Distributed Universal Number Discovery (DUNDi™)
* Do Not Disturb
* E911
* ENUM
* Fax Transmit and Receive (3rd Party OSS Package)
* Flexible Extension Logic
* Interactive Directory Listing
* Interactive Voice Response (IVR)
* Local and Remote Call Agents
* Macros
* Music On Hold
* Music On Transfer
o Flexible Mp3-based System
o Random or Linear Play
o Volume Control
* Predictive Dialer
* Privacy
* Open Settlement Protocol (OSP)
* Overhead Paging
* Protocol Conversion
* Remote Call Pickup
* Remote Office Support
* Roaming Extensions
* Route by Caller ID
* SMS Messaging
* Spell / Say
* Streaming Media Access
* Supervised Transfer
* Talk Detection
* Text-to-Speech (via Festival)
* Three-way Calling
* Time and Date
* Transcoding
* Trunking
* VoIP Gateways
* Voicemail
o Visual Indicator for Message Waiting
o Stutter Dialtone for Message Waiting
o Voicemail to email
o Voicemail Groups
o Web Voicemail Interface
* Zapateller
Computer-Telephony Integration
* AGI (Asterisk Gateway Interface)
* Graphical Call Manager
* Outbound Call Spooling
* Predictive Dialer
* TCP/IP Management Interface
Scalability
* TDMoE (Time Division Multiplex over Ethernet)
o Allows direct connection of Asterisk PBX
o Zero latency
o Uses commodity Ethernet hardware
* Voice-over IP
o Allows for integration of physically separate installations
o Uses commonly deployed data connections
o Allows a unified dialplan across multiple offices
Codecs
* ADPCM
* G.711 (A-Law & μ-Law)
* G.723.1 (pass through)
* G.726
* G.729 (through purchase of commercial license through Digium)
* GSM
* iLBC
* Linear
* LPC-10
* Speex
Protocols
* IAX™ (Inter-Asterisk Exchange)
* H.323
* SIP (Session Initiation Protocol)
* MGCP (Media Gateway Control Protocol
* SCCP (Cisco® Skinny®)
Traditional Telephony Interoperability
* E&M
* E&M Wink
* Feature Group D
* FXS
* FXO
* GR-303
* Loopstart
* Groundstart
* Kewlstart
* MF and DTMF support
* Robbed-bit Signaling (RBS) Types
* MFC-R2 (Not supported by Digium. However, a patch is available at Voip-info.org)
PRI Protocols
* 4ESS
* BRI (ISDN4Linux)
* DMS100
* EuroISDN
* Lucent 5E
* National ISDN2
* NFAS
Also as it is open source you can integrate this forum using php/mysql or pretty much whatever language you want.
Would i need to be on counterstrike to use teamspeak? As i dont have counterstrike, meaning in order for people to join in chatting, they have to buy it. What if they dont play games, they'd have to buy it just for that reason.
I'm just looking at otherways for us all to communicate, just a suggestion.