Preserve your Diva hardware by migration to IP

By migration to IP this is always a decision about the choice of the hardware for new IP based platform and about the hardware to maintain still existing E.1/T.1/S0/PSTN infrastructure. Often E.1/T.1/S0/PSTN infrastructure is used in parallel with new IP infrastructure over longer period of time for different grounds: maintaining one backup solution, step by step transition to IP, ...

Diva hardware provides the optimal choice for such situations. Diva hardware can be used in E.1/T.1/S0/PSTN area as regular Voice/Fax hardware, in VoIP gateways by transition between E.1/T.1/S0/PSTN and IP network and in the IP network for clear channel fax, conferencing and voice compression.
This is possible to use same DIva board for all mentioned above use cases at same time using provided by Diva dynamic distribution of DSP resources. This allows implementors to share one node for implementation of multiple present in VoIP functions saving the necessary for multiple nodes costs for power and for maintenance of extra hardware.

The functionality is supported by multiple applications and available to user programming interfaces which allows fast development of own solution.

Available applications:

• chan_capi
• Can be used as IP gateway, as PSTN PBX, as IP PBX, Voice mail system, IVR in PSTN and/or IP network
  
• Open source
• Fax with V.34 (33600 Bps)
• Clear channel fax with V.34 (33600 Bps)
• G.168 with 256 mSec echo tail length to provide echo cancellation in case not provided by gateway
• G.729, G.726, G.723 32K, GSM, iLBC, G.711 a/uLaw
• Conferencing with active talker evaluation and conference AGC
• Processing of DTMF tones, DTMF clamping
• Suppression of Ambient noises
• Digital gain control
• Playback and recording speed control
• Conferences between PSTN and IP conference members
• Please read README.media and README.Diva.fax for details
  
• softIP
• Use of Diva hardware in IP network
• SIP/UDP signaling
  
• Clear Channel Fax with V.34 (33600 Bps)
• T.38 Fax with v.34 (33600 Bps)
  
• G.168 with 256 mSec echo tail length to provide echo cancellation in case not provided by gateway
• G.729, G.726, G.723 32K, GSM, iLBC, G.711 a/uLaw
• Conferencing with active talker evaluation and conference AGC
• Processing of DTMF tones, DTMF clamping
• Suppression of Ambient noises
• Digital gain control
• Playback and recording speed control
• Kernel mode streaming to minimize delays and host load
• Conferences between IP conference members
• Simple migration of existing applications to IP
  
• sipControl
• Use of Diva hardware for VoIP gateway
  
• SIP UDP/TCP/TLS signaling, early media, reliable responses
• Secure RTP (encryption of RTP data)
• RTCP
  
• T.38 gateway with V.34 (33600 Bps)
• G.168 with 256 mSec echo tail length
  
• AMR-NB, G.729, G.726, G.723 32K, GSM, iLBC, G.711 a/uLaw
• Processing of DTMF tones, DTMF clamping
• Suppression of Ambient noises
• Kernel mode streaming to minimize delays and host load
  

Development of own applications

The access to all provided by Diva hardware features is provided using one single API. User application can use API not only to access provided by Diva hardware features but to control the provided by Diva drivers kernel mode streaming. Processing of entire real time traffic (RTP and RTCP) by kernel mode frees the deveper fron need to deal with details of real time data transport between Diva hardware and IP protocol stack.