Senior VoIP Engineer

Jobdescription

The proposed position will be for a member of a managed services technical team, which is responsible for VoIP, functions and services related issues (operations, 2nd and 3rd level support).

The engineer will be working in a group of IT experts locally and within multiple projects to cover the required services functionalities and availability.

Roles and Responsibilities

• This position will require travelling. When not on site, Engineers will be assisting in the development of project plans, designs and documentation for existing and new scopes.

• Plan, deploy, configure, troubleshoot collaboration solutions from the beginning to implementation by collaborating with vendors e.g. Cisco

• Establish a working Cisco UC Manager 10.x VOIP system while keeping in mind client requirements

• Plan, install, configure, examine and maintain Cisco Call Manager products

• Provide on-call operational level support for all facets of Cisco VOIP hardware and software

• Deliver proof of concepts for emerging technologies

• Assist in capacity planning of VOIP equipment and networks

• Provide VOIP architecture and infrastructure designs for data centers and site deployments

• Open TAC cases to rectify user, VOIP or collaboration infrastructure problems

• Write HLD/LLD for new scopes or tenders

• Have extensive knowledge of routing protocols (Static, OSPF, and BGP)

• Design and deploy changes to the configurations of clients as per the applicable change management process.

• Recommend and develop best practices for new locations

• Expertise in developing IPT/ VOIP applications

• Provide support services for SIP Signaling

Role Knowledge Requirements:

• Proven track record working with leading unified collaboration systems like Cisco, Avaya

• Experience with Cisco different collaboration products 

                . Cisco Unified Computing Systems (UCS)

                . Cisco Analog Voice Gateways 

                . Cisco Voice Routers 

                . Cisco Unified Communications Managers

                . Cisco Unity Cisco Emergency Responder

                . Cisco Expressway

                . Cisco Unified Border Element (CUBE) 

                . Webex

                . Cisco Prime Collaboration.

• Experience evaluating, designing, implementing, and managing collaboration infrastructure
• Working knowledge of Secure Real-Time Transport Protocol (SRTP) including associated G.711 and G.729 codecs and Digital Tone Multi Frequency (DTMF)
• Knoledge of third party/open source SIP stacks
• Familiarity with IPSec implementation and troubleshooting
• Hands-on experience with Session Border Controllers and Voice Gateways 
• Extensive hands-on experience with dial plans, IVRs, SIP, IAX, RTP, SRTP including TLS, DIDs, codecs and other protocols
• Solid understanding of traditional telephony, PRIs, BRIs, FXO/FXS, circuit-switching, POTS, PSTN, MTSO
• Very good knowledge of protocol and packet analysis 
• Solid understanding of OSI model, firewalls, IP routing, IP switching, VLANS, and QOS/COS
• Hands-on experience with network monitoring, network diagnostics, and network analytics tools 
• Experienced in virtualization platforms VMWare and Hyper-V
• Strong understanding of NAT traversal for VOIP
• Strong understanding of H.323, MGCP & ISDN
• Connectivity using copper/fiber
• Implement QOS in VOIP networks
• Effective communication and strong analytical skills 
• Knowledge of Linux environments e.g. Ubuntu, CentOS and shell/Perl scripting