Key features:
IPSTAR system supports voice applications over IP network as one of
the most promising services it has the following advantages :
• Substantially lower voice circuit cost than the SCPC/DAMA system.
• Uniform high quality nationwide service anywhere.
• Supports off-the-shelf Analog Telephone Adapter, IP or LAN Phone
& PABX and Enterprise & Carrier VoIP Gateway.
• Attractive Service
- Add-on Service for Corporate Intranet
- Rural Telephony Service
IPSTAR Voice Applications Solutions for Rural Telephony:
• The design of the IPSTAR modem can be adjusted for use in
the rural environment. It has a rugged enclosure to withstand harsh
environments, and come with air ventilation, anti-dust features.
• When compared to the conventional rural telephony using SCPC DAMA
(Single Channel per Carrier / Demand Assigned Multiple Access),
IPSTAR will be superior due to:
- Lower terminal equipment costs
- Ability to support other applications
on the IP network
- Better bandwidth efficiency, hence
lower bandwidth costs e.g. with IPSTAR, a 9.6 kbps-voice channel
requires only 24 kbps of IP package including IP headers, which
utilize about 30 kHz on Satellite Bandwidth compared to 48 kHz of
SCPC DAMA.
The bandwidth utilized for each voice channel depends on
Voice Codec.
| Voice Codec |
BW used per
Call (Including IP Headers) Within 30-ms Data Packets |
G.711
G.723 |
80 kbps
22 kbps |
| G.729 |
24 kbps |
IPSTAR Voice Application Solutions for Corporate Internal
Phones:
• IPSTAR Voice Application supports corporate use for internal telephone/fax
between head office and the remote branches.
• Since the IPSTAR system operates in an IP-based environment, it
allows the enterprise users to operate their own IP telephony network
over IPSTAR infrastructure supporting H323, SIP and MGCP. Three
major components of this VoIP network are the voice gateway, gatekeeper,
and IPSTAR voice box. With the IPSTAR voice box, it enables many
IP applications apart from VoIP such as: Internet Access, Multimedia,
VDC.
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