Voice – SIP Lines and Calls

Get instant cost savings on quality voice services

Growing business activity has seen an increase in the volume of voice calls and enterprises face pressure to reduce their overall expenditure on voice services. With NTT Communications ICT Solutions (NTT ICT) Voice - SIP Lines, you can rapidly connect your existing IP-based PBX to advanced communications features and achieve significant cost savings instantly. NTT ICT's SIP Voice Lines is the ideal solution for any business wishing to eliminate the costs of PSTN/ISDN line rental and introduce a range of advanced, user-friendly voice features across all offices. Unlike PSTN/ISDN, it gives you total flexibility to scale the number of Voice - SIP Lines connected to your PBX at any time, with minimal cost and hassle.

Benefits for using SIP Lines



Reduced costs
  • Enjoy instant savings on traditional phone line (ISDN and PSTN) charges, by switching to NTT ICT's Voice - SIP Voice
  • Per second billing gives you better value for all your calls
  • Economical local, national and international call rates
Free on-net calls between sites
  • Enjoy immediate cost savings from free on-net calls between all your locations connected to NTT ICT's Voice - SIP Lines
  • Simple extension-based dialing between your sites to simplify inter-office communications
Switch easily
  • Transfer your existing phone numbers* easily to NTT ICT
  • We integrate with all major ISDN and IP PBXs
Enhanced productivity features
  • Retain your existing PBX and subscribe to advanced Hosted PBX features such as voicemail to email, video-conferencing, auto attendant, click to dial, desktop integration and many other features
  • Setup automatic call diversion to alternate numbers
  • Manage your service and account via our online portal
Easily scalable
  • Increase the number of lines quickly to suit your requirements
  • Expand to new office locations without having to acquire a new PBX or new analogue lines

*Porting is subject to your current provider releasing your numbers and Australian Communications and Media Authority's Standard Zone Units limitations

NTTICT - Enterprise Voice

Network Overview

NTT ICT delivers managed SIP Voice Lines to your office or work location that seamlessly connect to your existing PBX and handsets. Once connected to NTT ICT's Voice network you will gain the benefits of IP telephony, such as free on-net calls and reduced call costs. In addition, you can enhance your existing phone system with breadth of additional features from our Hosted IP PBX PLATFORM.

Review our other Unified Communication services:

Hosted PBX

Unified Communication as a Service