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 DialSat Telephony & Fax Features

Telephone and Fax via Satellite

DialSat's Advanced Features
DialSat offers a range of advanced features that maximize system performance and cost savings for bundled telephony and Internet solutions:

  • Toll-Quality Full Duplex Voice
  • Payphone Support
  • Prepaid Calling Support
  • Group 3 Fax Relay
  • Voice Band Data
  • Full Mesh or Star Topology
  • Multiple PSTN Gateways
  • Conventional Numbering Plan
  • Remote Control and Monitoring
  • Ultra-Low Power Consumption

Toll-Quality Full Duplex Voice
A toll-quality G.723.1 voice compression algorithm is used at 6.4 kbps. It has a Mean Opinion Score (MOS) voice quality rating of 3.9, better than the G.726 32- kbps ADPCM. The algorithm is language-independent and passes in-band DTMF as well as other voice band tones. Every voice connection is full duplex. A voice coding of 4.8 kbps (near toll quality, MOS = 3.5) is available for further space segment savings.

PSTN quality Telephony and Internet - Anywhere, In No Time

Fast-Deploying Solutions for Remote Communities
DialSat enables telecom providers, governments, small businesses, remote farms and other enterprises to bridge the digital divide with converged toll-quality voice, fax and Internet capabilities:

Public Telephony

  • Public Call Offices
  • Pay phones
  • Prepaid Calling
  • Remote government offices
  • Internet kiosks

Private Telephony

  • Small Home/Small Office (SOHO)
  • Businesses
  • Remote farms
  • Services at remote tourist sites

Standalone Phones

  • Emergency/rescue
  • Rural roads and remote highways
  • Restoration/back-up - for non-satellite telephony networks

Payphone Support
Flexible adjustment to various payphones. 16/12 kHz or reverse polarity metering pulse is supported.

Prepaid Calling Support
End user subscribers can now purchase call-time in advance with the DialSat Prepaid Calling system - a convenient advance-payment add-on supported for mesh, star or multi-star topology networks.

Group 3 Fax Relay
Fully supported at 4.8 kbps, with automatic voice/fax mode switching.

Voice Band Data
Fully supported at 2.4 kbps (V.22 bis, V.23) with automatic voice/data mode switching.

Full Mesh or Star Topology
Full-mesh single hop communication between VSATs is available using a mesh connectivity plug-in card. Star topology further reduces operators' costs.

Multiple PSTN Gateways
Call routing can be carried out to several PSTN locations using digital E1 satellite or terrestrial Gateways.

Conventional Numbering Plan
Destination numbers for incoming and outgoing calls are manulated by the system to conform to PSTN conventions.

Remote Control and Monitoring
The Network Management System controls and monitors all parameters of the VSAT remote terminals via the satellite link. This sophisticated system:

  • Updates VSAT parameters and software
  • Gathers call data records for billing
  • Enables/disables remote units

Ultra-Low Power Consumption
Requiring very low power, DialSat is an excellent solution for remote areas where no power is available and solar panels are used.


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