Services for Telecom/Voice Development

SKILLS

PROTOCOLS
We have been working on NGN related projects for over two years and have a very strong grasp on several ITU and IETF standards. We have implemented stacks and handled implementation related issues as well as application and system integration related issues for our clients. We understand problems relating to design, maintenance, inter-operability, testing and resource consumption.

VOICE TRANSPORT
Voice over packet application development and performance tuning requires a first hand knowledge of how voice quality metrics are tied to network parameters. Since real network characteristics change erratically, sophisticated handling is needed to produce acceptable MOS levels and to diagnose voice quality problems. We have experience in handling real time media streams, including design and complete implementation of a dynamic jitter buffer

MEDIA ENCODING
We have worked with almost all the codecs standardized by ITU and have implemented PCM A-law and GSM 6.10 schemes for a special application. In addition to codec implementation, we have hands on experience with diagnosing codec related problems related to QoS (clipping, delay, data loss) and have worked on optimisation of codec choice for different network conditions.

NGN THIRD PARTY SOFTWARE
During the course of our work, we have had a chance to work with some of the most widely deployed NGN tools and frameworks. We have hands on experience with products from RADVision (Stacks), Elemedia (Stack and Codecs), Hughes (Stacks), Nuance (Recogniser, Speech objects).

SPEECH APPLICATIONS
We are very familiar with development frameworks such as PARLAY and S.100. Our experience includes development of a full fledged, vendor neutral service creation utility. We have produced specialized XML schema which serve as intermediate representations of services and call flows and allow for translations to other representations, high level languages (C, java, C++), byte code etc. We have demonstrated a range of services from basic Class 5 (diversion, wait, intrusion…) to sophisticated applications like conferencing and voice browsing.

REAL TIME OPERATING SYSTEM DEVOLEPMENT
We have experience with RTOS based development and a good understanding of how real time features are implemented at kernel, device driver and application level Formal Methods in Telecom Software Engineering
We have a good experience with system specification and design techniques used for high complexity, real time telecom systems. We have a good understanding of ASN.1, SDL and CASE tools.

VoiceXML
Prologix has been one of the early adopters of the VoiceXML standard. Close to the release of the first VoiceXML draft in March 2000, we developed our own implementation of the language by November 2000. We have tracked the VoiceXML standard and have ensured compliance with the most current W3C approved version of the standard at all times and have successfully licensed its VXML interpreter to customers in India, South America and the United States. With extensive experience of working with other leading VoiceXML technology (ASR, TTS, Gateway, Telephony) vendors and implementing complex VoiceXML applications in business-critical environments, Prologix's VoiceXML team brings several hundreds of man months of hands-on VoiceXML expertise to a new project. The benefits of this expertise accrue to the customer in the form of shorter implementation cycles, robust implementations and significantly lower system integration costs.