This case study describes how a leading telephony systems provider developed new SIP-based IP phones with PrimeSoft's help. PrimeSoft built a team to design and implement the phones' features according to the client's requirements. This included supporting calling features, protocols, and audio codecs. PrimeSoft collaborated with the client and chipset vendors, developing the software, testing the phones, and integrating them into the client's existing IP-PBX product portfolio. Outsourcing the phone development allowed the client to strengthen their portfolio and cater to new customers in a timely manner.

1. Case Study
Case Study:
SIP based IP-Phone Development
Abstract:
Telephony systems providers continually innovate, design and develop
newer Phones, ATA’s, Gateways and Applications to enhance their product
portfolio. This helps them establish a lead with their competitors and grow
into newer verticals.
This document highlights PrimeSoft’s capability in working with Telephony
systems vendor and Hardware Integrators in developing systems,
applications and diagnostic software for a new IP Phone product.
www.primesoftsolutionsinc.com
© 2009 PrimeSoft Solutions, Inc.

2. Case Study
Case Study
Client:
Our client is a leading provider of telephony systems and
applications to business customers worldwide. They deliver
application-rich, affordable VoIP systems to small and medium
businesses. They are an innovator in delivering high-value voice
“I would like to take this applications that enable businesses to be more productive and
dramatically reduce costs.
opportunity to commend
you for your hard work and
Business Situation:
careful engineering. I know Clients marketing team came up with a requirement to develop
it has been a long project, two new, SIP Based IP Phone that were to be added into their
existing IP-PBX product portfolio.
with a few frustrations, but
I have been consistently The new SIP Phones were required to support
pleased with the dedication
- All basic IP-Phone features such as Call Forwarding, Call
and professionalism that all Waiting, Conference, Voice Mail etc.
of you have displayed. I - Advanced business features such as Shared line
think you are excellent appearance, Call Park, Paging, Call Recording etc.
engineers, and a great - Protocols to be supported included: SIP, TFTP, RTP, SNTP,
team. ” HTTP, and NAT Traversal.
-Program Manager - Audio codes to be supported included: G.711, G.723,
G.729A and G.729B.
www.primesoftsolutionsinc.com
© 2009 PrimeSoft Solutions, Inc.

3. Case Study
Case Study
The Solution:
PrimeSoft built a team of experienced VoIP developers and
designers along with a dedicated quality assurance team for this
project. The team took complete ownership of developing these
IP-Phones for the client.
The phone features was designed and implemented in-house.
Some of the functionalities of the phones were designed in
collaboration with Taiwanese vendor. The Hardware design for
the phones were based on the Infineon Inca-IP based SOC chipset
and the reference design was provided by Infineon. Following
were the major tasks performed as part of this assignment:
Technologies Used: - Interfacing with client Product Line Managers, to capture
detailed requirements
- Embedded Linux OS
- Developing project plans and effort estimates
- SIP, RTP, RTCP and
- Staffing Offshore Development Team
other Networking - Setting up of a LAB and replicated client development and
Protocols test environment
- Developed functional specs and design documents
- C/C++ Programming, - Coding, unit testing, and integration testing
ASP, XML - Software Development of
o Embedded Board Support Package
- Shell Scripting
o Phone Application
o Basic and Advanced Call Features
- JTAG Debugging
o Diagnostics tools
o Protocols Integration
- MIPS based hardware
o Integrating with Existing IP-PBX product portfolio
- Quality Assurance
o Developing test plans
o Developing test cases
o Manual Testing
o Interoperability Testing
- Directly interfacing with the chipset vendors
- Directly interacting with OEM/ODM
- Providing periodic reports with updates to all project
stakeholders
www.primesoftsolutionsinc.com
© 2009 PrimeSoft Solutions, Inc.

4. Case Study
Case Study
SIP Phone Block Diagram:
Following is a block diagram of the SIP Based IP Phone that identifies the various peripheral
components of the SIP based IP Phone.
Business Benifit:
- Outsourced product development of IP Phones allowed client to strengthen their IP-PBX
product portfolio and cater to newer clients
- Re-usable components from this Project will help client roll out newer IP Phones and improve
their time to market
- Client gained from the expertise of PrimeSoft team, which is experience in design and
development of VoIP based products and solutions
www.primesoftsolutionsinc.com
© 2009 PrimeSoft Solutions, Inc.