Paul Sullivan

Paul Sullivan


Skills / Experience

Voice over Internet Protocol (VoIP) / Asterisk / SIP

From January 2014 the Voice project I was working on at Regus lost it's technical lead and I was increasingly asked to pick up networks and telephony planning and the project's product support.  This involved significant knowledge of SIP, external connections via an ALG, SIP in pure NAT and connecting other products via the Asterisk-based PBX platform distributed through around 1500 sites globally running a combination of SIP and PRI.

Over the last few years I've consulted to a number of local and multinational Companies on a once off basis regarding Asterisk Issues.  Notably:

Asterisk specific skills

 ALG / SIP Proxy / NAT

OpenSIPS on Linux

Claviser ALG routers

Using Asterisk as a SIP gateway to ININ's I3 platform

Trunks / VoIP / SIP

Android as a SIP client

I've worked on some investigation using the Galaxy S3 as a serious SIP client.

During the time at World First (until 2011) I was responsible for negotiations with Fixed Line and SIP trunk providers and ultimately responsible (albeit at arms length) for the entire multi-national (Nortel, then Shoretel) telephone system (UK, AU and DE).

My introduction to IP Telephony was during a 2008/9 contact position in Soho, looking after VoIP sites from 5 to 50 SIP extentions mostly in production houses.  I was soley responsible for the installation and setup of Asterisk and for provisioning Snom phones using DHCP and an external provisioning server.

Work as an Employee, Consultant, Contractor / Self Employed or via Limited Company

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Originally from East London in South Africa. I recently moved to Dorking, Surrey having previously lived in the London Borough of Sutton and Cape Town