Voice Test Engineer with exp in IMS or SIP or Wireshark tools at Infoplus Technologies, Great Warley Street, £Contract Rate

  • Outside Spy
  • Great Warley St, Great Warley, Brentwood CM13, UK
  • Jan 06, 2021
Duration not stated

Contract Description

Company Description

Infoplus Technologies UK Limited is a global IT services company focusing on Enterprise solutions and integration services consulting (SAP/Oracle), software development, product solutions for education segment and IT consulting services offering outsourcing solutions to enterprises worldwide. Since inception, ITL has focused on a principle to maximize output for its clients and partners through cost-savings, enhancing productivity and quality.

We challenge industry norms by holding ourselves accountable through our fixed-price commitments and a unique performance-pricing model. Head quartered at Borehamwood, United Kingdom, ITL was established in United Kingdom we help enterprises globally to plan their investments in technology, design and implement solutions that drive competitive advantage and deliver or manage critical applications to improve business performance. Based in UK, we have years of experience in servicing the clients across Europe and USA.

Job Description

We have an job opening for Voice Test Engineer with our client and the details are as below:

Job Type: Contract (Outside of IR35)

Duration: 6 Months extendable

Work Location: Brentwood, UK.

Job Description:

  • Subject Matter Expert in SIP protocol and has an understanding of IMS infrastructure.
  • Has expertise to analyse call-flows and point out protocol issues.
  • Knowledge in VoIP and IMS domain.
  • Has a proactive attitude for testing and having the expertise to suggest amendments to the test plan as and when required.
  • Has a good understanding of TCP-IP protocol stack.
  • Good understanding of RTP, RTCP, RTP Events, DTMF and SDP.
  • Ability to use Wireshark as an analysis tool to debug VOIP traces. (SIP & RTP)
  • Networking fundamentals: understanding DHCPv4 and v6, DNS look ups (NAPTR/SRV/AAAA/A records). How analyses them on Wireshark.
  • Networking fundamental: understanding how IPV6 works and the difference between IPV4 and IPv6. How to search and identify the IP layer information using wireshark trace.
  • SIP: understanding the RTP Attributes. Identifying codecs, DTMF, SRTP etc.
  • SIP: analysing RTP traffic in Wireshark. How do you check is there is one way audio or the correct codec is used in the RTP streams.
  • SIP: how to filter for a specific call.
  • SIP: identifying the agreed IP and Ports for signaling and media.
  • Networking: understanding QoS for Voice and how it works. How to check is COS and ToS is applied using Wireshark.
Added Advantage/Desirable skills:
  • Has a good understanding of how an FXS port works and the FSK protocol.
  • Has a good knowledge of the TR-69/ 104 specification.
  • Experience in SBC.
  • Knowledge in NAT, DNS, B2B UA, Load Balancing/Resilience Testing.
Additional Information

If comfortable with requirement, please reply with your updated cv and below requested details at your earliest convenience.

Current Daily Rate (in GBP):

Expected Daily Rate (in GBP):

Notice Period:


Work Authorization in UK:

Current Location:

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Best number to reach you:

Total years of experience:

Relevant years of Experience in Voice/IMS domain :

Payroll (Own Ltd company or Umbrella Company):