ARDIS Network Summary Information
- National (USA) terrestrial, trunked packet data radio network
for data applications only; currently no voice.
- Multiple transmitters in base stations connected to a local switching
nodes. Local switching nodes connected to one national switching node. Mobile devices
connected to ARDIS via supported modems. Typically, information servers at host computers
are connected to the national switching node.
- ARDIS operates in the 806 MHz to 821 MHz range for uplinks and in the
851 MHz to 866 MHz range for downlinks. 25 KHz channels are used.
- National; top 400+ MSAs with 10,700 cities: 90% of U.S. urban
businesses and 80 % of the total population are covered.
- ARDIS has subsidiaries or affiliated networks in the UK, Canada,
Germany, Australia, Malaysia, Singapore, and Thailand.
|Capacity and Speed
- ARDIS operates one to ten 25-KHz channels per coverage area.
- Currently (1995-96) supporting 44,000 users nationwide more
- Total capacity is far from full in some areas.
- Gradually increasing capacity and coverage as demand increases.
- Currently supports 4,800 bps (MDC 4,800) in most areas; RDLAP @19,200
bps is available in 33 areas in the U.S. and some parts of Canada. RDLAP service is being
expanded, based on customer demand and business economics.
- X.25, asynchronous, Bisynchronous natively: TCP/PI and IBMs SNA
(LU 2 and LU 6.2) supported through third-party gateways.
|Most Suitable Applications
- Short OLTP transaction-based and messaging, such as credit
authorization, sales automation, public safety, transportation truck tracking, e-mail,
- Long file transfer is NOT suitable for packet network.
- $39 per month for Bronze Pack (100 messages) to $139 per month for
Platinum Pack (650 messages) for Ardis personal messaging service.
- $0.06 per packet plus $0.03 per 100 bytes for packet-based
non-messaging applications with no e-mail.
- Available throughout urban U.S., Canada, UK and selected countries in
- Higher than cellular but some applications also need end-to-end
- Good nationwide coverage with seamless roaming within metropolitan
- Deep in-building penetration.
- RDLAP @ 19,200 bps gives good response times for
- Network is less hierarchical than RAM Mobiles Mobitex. This may
leads to fewer hops and better response times for some roaming users.
- Increasing support by hardware, systems and application software
- Limited throughput and speed in some areas (19200 only in large
cities) not suitable for file transfer.
- Not suitable for session-oriented applications relying on continuous
- Limited coverage in rural areas. Can be overcome by dual radio for
- Lack of support by remote access hardware vendors such as Cisco,
Ascend, Nortel, etc. .
- Cannot transmit facsimiles directly to fax machines.