|
| Non
Blocking Wide Area Networking |
All
members of wide area groups are guaranteed to receive
calls directed to their groups as long as they are available,
i.e., not on a private call at the time. When a group
call is sent, any site which is blocked will hold any
calls it receives in an FIFO queue until a channel opens.
No group call message is ever lost. Because of the nature
of dispatch radio, this time delay, which is very small
in correctly sized systems, is not noticed. Compare this
to other systems which simply ignore blocked sites. |
| Peer-to-Peer
Network |
No
Central switch is required for network operation of A
DV/IP network. Network Routing Software necessary to operate
the system is resident at each site in the DB-1000 base
station repeater, and is configurable from the SAS. A
connection between sites by any digital means such as
Microwave, Fiber, Digital Data Service lines, T1, Ethernet,
or any combination of these may be used. |
| Routed
Packet System |
The
DV/IP digital radio system is a pure packet, IP radio
system. There is no circuit switching and no switch, centralized
or otherwise, is employed. |
| RSSI
Reporting |
DB-1000
Repeaters: the received signal strength measured by
both receivers is displayed in real time in dBm.
DM-1000
Mobiles: In "technician" mode the RSSI is
displayed in dBm. In "user" mode, a bar graph
is provided.
DM-400
Mobiles and DB-400 Repeaters (both discontinued): The
RSSI is displayed as an arbitrary number from 1 to 128,
a higher number representing a higher signal strength.
|
| Secure
Audio to Consoles |
All
audio in the system remains digitally encrypted until
decoded by a mobile, portable, console or interconnect
interface. Consequently "backhaul" communications over
microwave, wire or packet networks is secure. |
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