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How to use 3GiVx with your SIP device

What you will need:

  • You need a 3GiVx username and password in order to call via our network. So first sign up with 3Gi by downloading the application form, complete and return by This email address is being protected from spambots. You need JavaScript enabled to view it. and receive a Username and Password via e-mail.
  • Your own 087 number for inbound and outbound calls
  • Or request a number with a geographical dialling code (012, 011, 021 017 etc.)
  • Or port your existing phone numbers to 3Gi VX
  • Pay your first invoice which will consist of
    • A call deposit based on your monthly budget
    • A once-off setup fee per number
    • One month’s trunk rental
    • One month’s support contract
    • Any extras you may have selected in your agreement.
  • VoIP equipment , for example SoftPhones, HD Phones – Yealink, Snom, GrandStream, PBX’s – 3CX, Asterisk and/or SIP enable Cell phones (Nokia)


You can use 3GiVx with the following types of SIP devices:

  • SIP ATA (Analogue Telephone Adapter)
  • SIP Hard Phone / Softphone
  • xDSL Modem
  • 3CX PBX
  • Asterisk PBX


Most devices are equipped with a combination of the following ports.

Example 1

SIP Devices
(This is an example layout; every type of device will have its own layout.)


Example 2

SIP Devices
(This is an example layout; every type of device will have its own layout.)


ADSL: Connect your line from your ADSL provider


  • LAN: port for your (home) network, you can connect e.g. your PC, notebook, network-printer or wireless router
  • PHONE: here you can connect your analogue telephone
  • LINE: connect your analogue (PSTN) telephone line
  • USB: you can connect PC or notebook with a free USB port


Some SIP devices have more than one LAN port and/or PHONE port available.

For the hardware connections from your SIP device use the above image as a reference or consult your user manual. After connecting the hardware ensure that your software is installed and configured the right way.


Software configuration


  • General Software Settings
    • SIP port : 5060
    • Registrar : sip.3gi.co.za
    • Outbound proxy server : leave empty
    • Account name : your 3GiVx username
    • Password : your 3GiVx password
    • Display name/number : your 3GiVx username or voip number
    • Stunserver (option) : stun.3cx.com

  • Codecs
    • G711 / (u-law, a-law) (64 kbps)
    • G722 (48kbps)
    • G726 (32 kbps)
    • GSM (13.2 kbps)
    • G729 (8 kbps)
    • G723 (5.3 & 6.3 kbps)
    • Speex (2.15 kbps