VoIP and telephony functionality |
Prosody S |
| Audio/voice channel capacity |
CPU dependent, see table below
|
| VoIP protocols |
Signalling and control |
SIP, SIPS (Secure SIP), SDP, H.323, MRCP, VoiceXML 2.01,
CCXML 1.01,
For details see protocols and approvals |
| Media |
RTP, Secure RTP, with variable frame size;
RTCP1, RTCP XR1 |
| Voice compression |
G.711 Annex I & II, G.723.1A, G.726, G.728, G.729AB, OKI
and IMA ADPCM, GSM-FR, GSM-EFR1, MS-GSM, AMR-NB, EVRC,
iLBC, SMV1,
G.722.2/AMR-WB1, VMR-WB1
Additional codecs supported – please contact Aculab for further information |
| Jitter buffer |
Adaptive, with configurable upper limit |
Lawful intercept support
(LI/CALEA) |
Via RTP forking and packet replication |
| Additional telephony functionality |
User-configurable DSCP (ToS byte); DHCP;
transparent data over RTP (IETF RFC 4040) |
| Media processing functionality |
| Conferencing |
N-way matrix conferencing; mixing loudest speakers;
independent volume and gain control for each participant;
active speaker detection; active speaker notification via CSRC;
DTMF events suppression |
| Audio recording and playback |
Recording and playback to local and remote hosts; multiple
file formats;
fast/slow pitch invariant replay |
| Audio gain control |
Automatic (AGC) or programmable for each channel |
| Transcoding |
Any-to-any voice codec; full-duplex channels |
| Fax handling |
T.38 fax termination, pass-through and relay1 |
| DTMF handling |
DTMF detection and generation; inband; pass-through; DTMF relay and user indications (RFC 2833); DTMF out-of-band
(SIP INFO, RFC 2976) |
Speech
- Automatic speech recognition (ASR)
- Text-to-speech (TTS)
- Speaker verification and identification (SVI) |
Integration with 3rd party voice engines via MRCP v1 and
v2;
For details see MRCP product bulletin |
| Additional media processing functionality |
Tone generation; universal tone detection; call progress
tone detection; pulse/rotary dial detection1; grunt
detection; voice activity detection (VAD); comfort noise
generation (CNG); packet loss concealment (PLC); silence
suppression; live speaker/answering machine detection;
voice morphing/pitch change1 |
| Other functionality |
| Operating systems supported |
Microsoft XP/2000, Microsoft Server 2003; Linux1 |
Support for application
development software |
Integration with Pronexus’ VBVoice RAD via voice interface library (VIL)2 |
| Software licensing |
Flexible, starting from a single channel per host with no
upper limit3;
free development licences (4 channels, 45 days) |
Typical figures tested on Intel Xeon 5160 2x Dual-Core CPU running at
3GHz with 4Gbyte RAM.
