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 IP-PBX

IP-PBX -based telephony solutions offer a rich and flexible feature set. Ip-pbx offers both classical PBX
functionality and advanced features, and interoperates with traditional standards-based telephony systems and Voice over IP systems.

IP-PBX offers the features one would expect of a large proprietary PBX system such as Voicemail, Conference Bridging, Call Queuing, and Call Detail Records.
Protocols  
- IAX™ (Inter-Ip-pbx Exchange)
- H.323
- SIP (Session Initiation Protocol)
- MGCP (Media Gateway Control Protocol)

Codecs  
- ADPCM
- G.711 (A-Law & µ-Law)
- G.726
- G.729
- GSM
- iLBC
- Linear
- LPC-10
- Speex

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

PRI-Protocols  
- 4ESS
- BRI (ISDN4Linux)
- DMS100
- EuroISDN
- Lucent 5E
- National ISDN2
- NFAS

Scalability  

TDMoE (Time Division Multiplex over Ethernet)
     - Allows direct connection of Ip-pbx PBX
     - Zero latency
     - Uses commodity Ethernet hardware
Voice-over IP
     - Allows for integration of physically separate installations
     - Uses commonly deployed data connections
     - Allows a unified dialplan across multiple offices


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)
- Macros
- Music On Hold
- Music On Transfer
  - Flexible Mp3-based System
  - Random or Linear Play
  - Volume Control
- Privacy
- Overhead Paging
- Protocol Conversion
- Remote Call Pickup
- Remote Office Support
- Roaming Extensions
- Route by Caller ID
- Media Access
- Supervised Transfer
- Talk Detection
- Text-to-Speech (via Festival)
- Three-way Calling
- Time and Date
- Transcoding
- Trunking
- VoIP Gateways
- Voicemail
  - Visual Indicator for
    Message Waiting
  - Stutter Dialtone for
    Message Waiting
  - Voicemail to email
  - Voicemail Groups
  - Web Voicemail Interface
- Zapateller
 
   
   
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