Specifications

Organization
Introduction
August 08, 2000 68P81095E55-E 1-7
Circuit Switched
Data Networking
Using traditional dial-up technologies, an iDEN MS can access and use remote
computing services based on the access rights and permissions of a Host server or
and internet service provider.
Packet Data
Networking
Packet data allows an MS to be logically linked to a host system of the internet.
Using packet data the MS becomes a remote mobile node on the associated network.
Dispatch Calling
Dispatch calls follows the half-duplex model of communication. Communication is
one-way at a time. This applies to most voice communication.
Dispatch calling splits a single 25 MHz carrier into 6 channels. This division
increases the carrier load from one (analog cellular) to a maximum of 6 per carrier.
During a dispatch talk, one channel on the carrier is used. For all those in the group
listening during a group call at a single cell site use only one channel -- reducing
resources. If everyone in the conversation, only one channel at each hosting EBTS is
used. A channel is used and allocated for the duration of the conversation (until
everybody hangs-up or times-out). This consolidation reduces the network traffic
and allows dynamic channel assignment to maximize the network resources.
Interconnect Calling
The iDEN system also provides clear, digital cellular subscriber services if a call is
made across a land-line network.
The service provider may chose to provision the system for optimum resource usage
or for optimum voice quality. The iDEN system splits a single 25 MHz carrier into 6
channels. The provider may provision one channel per call for optimum resource
usage or the provider may provision 2 channels for a call to improve interconnect
voice quality but reduce available resources. (page 3-7).
Short Messaging Service
As part of subscriber services, up-to 140 alphanumeric characters can be transmitted
to a mobile station. This Short Message Service (SMS) can be applied to voice and
data devices the are compatible with the local coverage area network. This service is
part of, and controlled by, the Mobile Switching Center (MSC).
Digital Communication Technology
Digital communication has several advantages over analog communications.
• Voice compression maximizes network resources and reduces eavesdropping
• Bad packet rejection reduces echoes and interference to improve voice quality
• Improved security by encoded voice and digital data
• Intranet, Virtual Private Network (VPN) and Internet Access
• Increased potential for subscriber services
Mobile Stations
The type of devices that can be used as Mobile Stations (MSs) include:
• Dispatch Base Stations
• Radios/Telephones (Lingos 360s, i500s, i6000s, i6000+s.)
• Emerging RF Laptops (terminals) and Personal Data Assistants (PDAs)
To function, the devices must operate in the local network’s RF spectrum.