VoIP Phone Service

Small Business and Enterprise VoIP

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Reliable Phone Service

ITSS VoIP meets the needs of the home based and small business Voice Over IP user by offering an affordable line of quality products and services. Local and toll-free numbers are available at any time. We will build a custom phone system for your business.


ITSS offers a variety of solutions to fit your business needs.

  • Hosted or onsite phone systems (PBX)
  • SIP trunking
  • Virtual fax that delivers to your email as a PDF
  • System customization of VoIP phones
  • Programmable, on-demand call control and call routing (to eliminate answering services)


Explore the advantages that ITSS offers. Take your telelphone with you anywhere in the world where there is an Internet connection, just as if you were sitting in your office.

Currently Available Products

yealink t27g

IP Phone SIP-T27G

Supports EXP20 expansion module.

Download User Guide

yealink t29g

IP Phone SIP-T29G

Supports EXP20 expansion module.

Download User Guide

Expansion Module EXP20

Expansion Module EXP20

Additional Products We Can Support

yealink t26p

IP Phone SIP-T26P

yealink t28p

IP Phone SIP-T28P

yealink t27p

IP Phone SIP-T27P

Supports EXP20 expansion module.

Download User Guide

Gigabit Color Phone t38g

Gigabit Color Phone SIP-T38G

Exclusive Features

unlimited nationwide calling

Unlimited Nationwide Calling

call transfer

Call Transfer

find me follow me

Find Me, Follow Me

voice mail email notification

Email Notification Voicemails

Custom Hold Music

Custom Hold Music

Conference Calling

Conference Calling

Keep Current Phone Number

Keep Current Phone Number

Enhanced Groups

Enhanced Groups

auto attendants


self-service portal

Self-Service Portal

advanced mobility features

Advanced Mobility Features