The Telecommunications Industry Association (TIA) represents manufacturers and suppliers of global communications networks through standards development, policy and advocacy, business opportunities, market intelligence and events and networking.
The TIA also endorses The SIP School as the 'provider of choice' for SIP. You can see The SIP School page on the TIA website here http://www.tiaonline.org/resources/certification
Both organisations are commited to co-promotion whereby The SIP School continues to inform it's community of TIA events whilst at the same time being a 'Organisational supporter' of their annual TIA Networking event, details of which are here http://www.tia2017.org
Member companies of the TIA are also eligible for discounts and should contact The SIP School for more details https://www.thesipschool.com/contacts/form
The main TIA site is here
There is also a great media outlet site called TIA Now here