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>>  TFone MultiLine - FAQs
TFone MultiLine FAQs


What is VoIP?

VoIP stands for Voice over Internet Protocol, a general term for a family of transmission technologies, used for delivery of voice communications over IP networks (such as the Internet or other packet-switched networks.)


What is SIP?

SIP stands for Session Initiation Protocol, a signalling protocol used for setting up and tearing down multimedia communication sessions for VoIP. TFone Numbers use SIP protocols to initiate phone calls. Other signalling protocols (ie. IAX) will be implemented at a later stage.


Can I send and receive fax documents over VoIP?

TFone does not limit or block fax traffic over our network.
However, if you wish to transmit fax signals over the VoIP network, you should use the G.711 ulaw (PCMU) codec (highest quality but uses the most bandwidth). TelecomAUS cannot guarantee the quality of fax documents transmitted using TFone however we will put our best effort for fax over IP.


Do you provide internet connections?

Sorry, we do not provide internet connections at this point. We prefer to let our customer to choose their own Internet Service Provider (ISP).


We don't have in-house VOIP Technician. Can you set up and maintain an In-House IP PBX for us?

Yes we can, but some installation/maintenance costs are involved. Pricing depends on how complex your requirements are. Please contact us for more details.


What types of audio codecs do you support?

TFone Trunk Service supports number of codecs as per below:
  • G.711 ulaw (PCMU)
  • G.711 alaw (PCMA)
  • iLBC
  • Speex
  • CELT
  • GSM
  • G.722
  • G.726
  • AAL2

Somehow we can only make 3 concurrent calls reliabily at a time over ADSL connection. Can we increase number of concurrent calls?

If you are using the G.711 ulaw (PCMU) codec, you can use more compressed codecs such as iLBC or GSM to increase the number of concurrent calls on an existing line. However, more of your IP PBX / VOIP hardware MUST support these codecs. Beware, more compression means lower call quality.
If you want more concurrent calls while reserving call quality, we recommend you install a fibre or UNS Internet Connection on your site to increase reliability.