1.
Prosody S
Communications software
from Aculab
Andrew Nicholson Jan-17
APB0224 v4

2.
Contents
• Prosody S summary
• Why choose Prosody S?
– 6 reasons
• What can I build?
• Features summary
• Roadmap

3.
The Prosody family of products
• DSP-based processing in board
and 1U box form-factors
• IP and TDM media
• VoIP and PSTN signalling
• Up to 16 E1/T1 trunks
• Software product
• IP media
• VoIP signalling

4.
Prosody S summary
• Host media processing (HMP) software
• Runs on host CPU of standard IT servers
• Voice (VoIP) and fax communications applications
• Enterprise and service providers
• Scales from 1 to thousands of channels

5.
Why choose Prosody S?
1. Very comprehensive media processing
capabilities
• Wide range of Codecs supported – including HD
Voice
• Extensive fax support T.30/T.38
• Deployment proven SIP stack

6.
Why choose Prosody S?
2. Flexible deployment models
• Bare metal servers, virtual machines, hosted
servers or cloud servers
• A valid proposition to build up “ hosted “ ( Private
Cloud ) based SW solutions
• Linux & Windows, 32 & 64 bit
• Distributed architecture
• Flexible licensing – pay for what you need, per
channel

7.
Why choose Prosody S?
3. Scalability
• Scales from 10s to thousands of channels
• Install only the channel quantity needed; support
for licence moves and changes to meet your
capacity needs

8.
Why choose Prosody S?
4. Cost efficient
• Simple pricing, no hidden costs for extra
functionality
• Pay only for what you use (per channel)
• Supports startup deployments with low initial costs
• Capex or Opex purchase models (buy or rent)

9.
Why choose Prosody S?
5. Robust, proven technology
• Trusted by organisations globally
• Thousands of deployed channels in both
enterprise and mission critical (emergency
services) scenarios
• Broad set of reference cases

10.
Why choose Prosody S?
6. Simple transition for Prosody X customers
• Same API as Prosody X
• Same installation tools as Prosody X

11.
• On-premise or hosted/cloud-based solutions
• SIP-based IP-PBX services
• Virtual PBXs
• IP contact centres
• Audio conferencing servers
• Fax servers
• Cloud communications services
What can I build?

12.
• Voice API – play/record, DTMF handling, answering machine
detection, etc.
• Transcoding
• Conferencing
• Fax transport
• Wide range of fixed and mobile network audio codecs supported
including HD Voice codecs for optimal audio quality
• Works on Windows/Linux servers and virtual machines
• IPv4/IPv6 support
• Distributed (remote) API architecture
• Common API with Prosody X hardware
– For common features (e.g., no switch API)
• Dual redundant SIP service (DRSS)
Prosody S – key features summary

13.
Thank you

14.
Extra slides

15.
Prosody S – existing functionality
SIP/SDP
RTP
Signalling and
control:
Media layer:
G.711(I & II) G.723.1A G.726
MRCP
Secure RTP
G.728 G.729AB
GSM-FR GSM-EFR
T.38
H.323
Voice codecs:
Fax:
Recording Playback
Media
processing:
CNG
ConferencingTranscoding
PLC
VAD DTMF
handling
iLBC
AGC
Jitter buffer
AMR-NB
EVRC
Call progress
MS-GSM
OKI/IMA
ADPCM
Speex TETRA
RTCP
Live speaker
detection
Active speaker
notification
SIPS/TLS
G.722 G.722.1 G.722.2
(AMR-WB)
T.30 over G.711
SILK

16.
Features explained – distributed API architecture
• Application software operates on centralised server
• Multiple Prosody S equipped servers supported, can
be scaled to meet implementation needs
– No impact to local compute resources on each Prosody S
server
• Flexible scaling of site capacity
– Operational cost control
– Quick response to expansion needs
• Operational integrity
– 3 levels of redundancy (plus DRSS)
– Failover for application control

17.
Call centre application with distributed API
Software, distributed amongst several servers,
can act as one solution
Firewall
Public
IP network
Server #1
Prosody S
Local area network
Storage
database
Agent stations
Callers
Prosody S
Server #n
Control
application
Contact centre solution

18.
Features explained – common API with Prosody X
• Developers have only one API set to learn
• Projects can be ported easily to Prosody X or
Prosody S as required
– If suitably programmed (no switch API)
– Professional Services available for consultancy advice
• Quicker feature development times for Aculab –
faster time to market for our customers

19.
Features explained – fax
• Both G.711 fax pass through and T.38 fax modes are supported
• T.38 fax (FoIP) is intended to replace the sometimes un-reliable fax
over VoIP approach (G.711 pass through) and enable full migration
to an all-IP network for all business telecom needs

20.
Features explained – wideband (HD Voice) support
• HD Voice codecs
– 20Hz to 7kHz audio bandwidth for clearer speech
applications
– G.722; G.722.1*; G.722.2 (AMR-WB) all available
– Skype SILK
– Others under consideration – EVRC-NW, Speex
wideband, Broadcom BV32, Opus
• Applications
– Wideband conferencing server
– Wideband enabled call centre server
– Transcoding server
– Gaming platforms
– etc
* G.722.1 is offered as a beta version awaiting full testing

21.
Features explained – dual redundant SIP
service (DRSS)
• Ability to duplicate the SIP stacks for resilience
• Bringing PSTN centric ‘five 9s’ availability
concepts to the SIP world
– Fundamental requirement for telcos; becoming more important
now also for enterprises
• Recovery from failure conditions taken for
granted in the PSTN, but equally valid for SIP
networks
• Reactions from customers and analysts very
positive – we have something unique
• Whitepaper available via website

22.
How to purchase
• Licence purchases will be credited to a customers licensing account
accessible 24x7
• Single channels or blocks of credits can be purchased in advance,
used as needed
• Licence keys created by the customer as required using a web
interface to our licensing database
• Rental option now available, contact us for details
• Prosody S software
is licensed, granular
increments
– Part code ACS9200
– Prosody S single
channel licence

23.
Channel counts – Prosody S v3.0 (Windows)
Notes:
1. Typical figures as tested on Intel Core 2 Extreme (X6800) @ 2.93GHz running Windows XP SP3
2. All the channel count figures in the table are given for 85% CPU utilization
3. Refer to datasheet for full list of channel counts and codec types
4. Wideband codec tests performed on Intel Xeon quad-core machine
Prosody S
feature
Feature
detail
G.711
codec
G.723.1A
codec
G.729ab
codec
T.38 fax G.722
G.722.2
(AMR-
WB)
Music on hold
playback
10 different
music replays
2200 130 400
Recording and
playback
Full-duplex
channels
630 115 230 604 364
Recording and
playback
Full-duplex
channels with
DTMF
detection
580 115 220
Matrix
conferencing
Full-duplex
channels
730 120 250
Transcoding
to/from G.711
Full-duplex
channels
n/a 115 210
Fax (FoIP) 750
Windows OS

24.
Channel counts – Prosody S v3.0 (Linux)
Notes:
1. Typical figures as tested on Intel Core 2 Extreme (X6800) @ 2.93GHz running SUSE Linux version 10.3
2. All the channel count figures in the table are given for 85% CPU utilization
3. Refer to datasheet for full list of channel counts and codec types
Prosody S
feature
Feature
detail
G.711
codec
G.723.1A
codec
G.729ab
codec
T.38
fax
G.722
G.722.2
(AMR-
WB)
Music on hold
playback
10 different music
replays
4000 130 650
Recording and
playback
Full-duplex
channels
850 120 310 110 40
Recording and
playback
Full-duplex
channels with
DTMF detection
750 120 310
Matrix
conferencing
Full-duplex
channels
800 120 360
Transcoding
to/from G.711
codec
Full-duplex
channels
n/a 120 340
Fax (FoIP) 1600
Linux OS