Table of Contents
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Locality 1
Viking® VX Repeaters
Data
Bus
Subscriber
Units
System and Subscriber
Manager
Call Processor
Ethernet Link
Ethernet Link
6.1 INTRODUCTION
6.1.1 GENERAL
LTR-Net™ is the next generation of LTR®
trunked radio signaling. It provides many new
enhanced operating features while maintaining
compatibility with most current LTR equipment. Some
new LTR-Net features include roaming, unique ID
calls, and over-the-air reprogramming. Equipment
changes include the addition of an LTR-Net 3000-
Series switch and System and Subscriber Manager to
provide system control. A diagram of an LTR-Net
system is shown in Figure 6-1.
SECTION 6 LTR-NET OVERVIEW
Subscriber
Units
Voice and
Data Link
Figure 6-1 LTR-Net System Diagram
Locality 2
Viking® VX Repeaters
Data
Bus
Voice and
Data Link
3000-Series
Public Switched
Switch
Telephone Network
(PSTN)
Call Processor
Ethernet Link
6.1.2 COMPATIBILITY WITH LTR
LTR Subscriber Units Operating in LTR-Net Systems
•
Standard group calls occur in the normal manner.
These calls can be to other LTR subscriber units or
between LTR and LTR-Net subscriber units.
•
Wide area group calls can be placed and received
(see Section 6.4).
•
LTR telephone calls can be placed and received in
the normal manner.
•
Enhanced LTR-Net features such as roaming and
unique ID calls are not available.
6-1
LTR-NET OVERVIEW
Locality 3
Viking® VX Repeaters
Data
Bus
Subscriber
Units
Voice and
Data Link
3000-Series
Switch
November 2001
Part No. 001-7240-001
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