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Tellabs 9192 Circuit Module
Tellabs 9192
The Tellabs 9192 is a 2-wire ARD (Automatic Ringdown) Conference Access Trunk Circuit Module that belongs to Tellabs’ Network Telecom product series. It is designed to provide dedicated conference access paths in enterprise or carrier networks, supporting fast call setup for point-to-point or multipoint conferences.
Key Technical Specifications
- Interface Type: 2-wire ARD (Automatic Ringdown)
- Circuit Function: Conference Access Trunk
- Operating Voltage: Standard telephone line level (approx. 48 V DC)
- Signal Characteristics: Supports 2 W low-power signal transmission, compatible with ARD interfaces of traditional PBXs and digital switches
- Module Dimensions: Standard 19-inch rack unit, facilitating easy cabinet installation
- Reliability: Complies with Bell System Practices for trunk circuit installation and maintenance, equipped with overvoltage and overcurrent protection
Product Features
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Fast Conference AccessThe ARD mechanism enables automatic call establishment upon detecting the remote party’s ringback tone, eliminating the need for manual dialing or signaling interaction.
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Low-Power DesignWith a transmit power of only 2 W, it reduces line power consumption and extends equipment service life.
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High CompatibilitySeamlessly integrates with other Tellabs network modules (e.g., 9191, 9193–9195) as well as third-party PBXs and digital switching systems.
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Modular StructureFeatures a standard rack-mount package for easy hot-swapping and maintenance in cabinets.
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Safe and ReliableMeets Bell System Practices’ protection requirements for trunk circuits, with built-in overvoltage, overcurrent, and short-circuit protection.
Structure and Components
- Front-End Interface Board: Provides 2-wire ARD ports for connecting telephone lines.
- Signal Processing Unit: Internally integrates a low-power amplifier, loop detection circuit, and automatic ringdown decision logic.
- Control and Monitoring Board: Equipped with status indicator lights and fault diagnosis interfaces, enabling operation status retrieval via external management systems.
- Power Supply Module: Powered by 48 V DC, with built-in voltage regulation and protection circuits.
Typical Application Scenarios
- Dedicated line access for large enterprise internal conference systems
- Specialized conference trunks for security-critical sectors such as finance and government
- Carrier-provided enterprise private lines (E-Line) or value-added services (V-Line)
- Remote command centers requiring low-latency and reliable call establishment
Installation and Maintenance Guidelines
Cabinet Installation
Insert the 9192 module into an empty slot of a standard 19-inch rack, ensuring proper connection of the backplane and power cables.
Line Access
Connect 48 V DC 2-wire telephone lines compliant with ARD standards to the front-end interface, and verify polarity and impedance matching.
Power Supply
Connect to a 48 V DC power source, confirm stable voltage output, and check that overvoltage/overcurrent protection functions properly.
Status Check
Indicator lights on the module front panel display power, line, and loop detection status. In case of anomalies, fault codes can be retrieved via the management interface.
Regular Maintenance
In accordance with Bell System Practices, it is recommended to perform line impedance measurement and contact cleaning every 12 months to ensure ARD detection sensitivity.
Troubleshooting
If calls fail to establish or ringback function malfunctions, first check line voltage and contact corrosion. Replace the front-end interface board or power supply module if necessary.
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