MODEL 827
MPT 1327 Trunking Controller

MPT 1327 Dispatch & Interconnect
The Model 827 MPT Trunking Controller is a uniquely flexible building block which forms the basis of a fully-featured MPT 1327 system infrastructure. The switchless architecture of the Model 827 means that systems as small as 1 or 2 channels can be expanded in a modular fashion into a wide area, multisite network.
In addition to full MPT functionality, a system built around the Model 827 also offers extensive telephone interconnect capabilities including user-recordable voice prompts. Use of distributed processing ensures a high degree of system resilience for both single and multisite networks, minimizing downtime in the event of base station or link failure.
Extensive subscriber management and call detail recording facilities are available and may be remotely accessed for configuration and diagnostics purposes. With a large number of systems operating worldwide, compatibility with a range of base station and mobile/portable equipment is assured.

INTRODUCTION

The MPT 1327 trunked mobile radio standard is internationally recognized for public and private radio systems. Zetron’s Model 827 Trunking Controller implements this standard in a single controller package along with integrated advanced telephone interconnect capability. Its modular design approach ensures a cost-effective system with expansion capability. Many features are incorporated into the controller.

BENEFITS

The MPT 1327 open standard provides a highly capable and flexible trunked system. Users can choose from a wide range of equipment choices for both subscriber units and site repeaters, specific to their performance and investment requirements. At the heart of each MPT 1327 system is a dedicated digital control channel, where call requests and channel assignments are rapidly processed to provide fast user access. Group and individual
conversations are possible, as well as group announcements. If a called party is busy, a user can request a call back. Many other call types are also supported.
System operators gain extensive control and management of all aspects of their system. Due to the variety of highly configurable system and user parameters, one can optimize their trunking system for ideal performance, efficiency and security. For example, users can be required to log in using their mobile electronic serial number (ESN). Different fleets can be supported on the system. Within a fleet, individuals and groups can be identified and users given priority access. Emergency calls are fully supported and can even preemptively demand resources to ensure call execution. System statistics and billing summary data are also readily available is an exportable data format.

CALL TYPES
The MPT 1327 specification has structured call types with room for user definition. The following call types are supported:

• Individual
  – Simple, Emergency, Priority, PSTN, PABX
• Group
  – Normal, Emergency, Inbound, Broadcast or Conference, PSTN, PABX
• Status
• Inter-prefix Individual, Group, and Status
• Registration
• Non–Prescribed (traffic channel) Data
• Include Call (individual or group)
• Emergency call with preemptively clearing

Features

TRUNKING CONTROLLER

• Fully MPT 1327/1343 compliant Modular “plug and play” structure enables an economical building block approach to site development with expansion capability of up to 24 channels per site, and 32 sites per system
• Individual Subscriber Validation plus Electronic Serial Number (ESN) checking
• System configuration software is included and provides easy configuration setup and maintenance from a single local or remote connection
• Intersite database programming allows multisite networks to be programmed and updated remotely from a PC, using only one physical connection to any site
• External sense and internal alarm input monitoring
• Four levels of user defined call priority in addition to the three MPT 1327 standard levels
• Support for an extensive range of MPT 1327 call types
• Emergency calls can be set to demand resources by preemptive clearing of existing calls
• Three separate call queues for voice, phone, and busy mobile
• Cyclic control channel operation for balanced repeater transmitter duty-cycle loading
• Flash upgradable firmware/software
• Supports "AHOY-P" — checks radio availability on traffic channels for members included in multi-site group calls. Sites with members not automatically responding to interrogation are withdrawn to make system resources available for other calls

TELEPHONE INTERCONNECT OPTION

• Configurable for telephone interconnect interface, or audio link port for multisite networking
• Internal voice prompts provide user-friendly dialing guidance for incoming calls
• Least cost routing for outgoing telephone calls reduce toll charges
• Line level balance settings accomplished via software
• Built-in modem for dial-up database management
• Built-in DSP (Digital Signal Processing) audio processing and echo canceling

Specifications