DMD15/DMD15L IBS/IDR Satellite Modem

Operation

 

 

can be connected to the ‘Insert Data In’ Port where received data will overwrite ‘dropped on’ the T1/E1 Data Stream. The modified T1/E1 Data Stream will then exit the modem out of the ‘Receive Data Out’ Port.

3.5Earth Station to Earth Station (ES-ES) Communications Port (Async Port J9)

The UIM contains a selectable RS-232, or RS-485 Asynchronous Communications Port for Earth- Station-to-Earth-Station Communications. The data is routed from the 9-Pin “D” Connector J9 to one of the M&C Processor UARTS on the Baseband Processor Card. The baud rate and protocol can be selected from the Front Panel.

3.6 Terrestrial Loopback

The UIM also provides for terrestrial loopback. For Tx Terr Loopback, Tx Data, after passing through the Line Interface is looped back to the Rx Data line drivers. For RX Terr Loopback, the Receive Data from the satellite is looped back for retransmission to the satellite providing a far end loopback. Tx/Rx Loopback provides both loopbacks simultaneously. Refer to Figures 3-4 through 3-6 for loopback functional block diagrams.

3.7 Modem Status

The UIM provides several status indications, which are controlled by the M&C Processor.

Form-C Contacts:

The UIM provides three Form-C Relays under processor control that appear at J11.

Mod Fault:

De-energized when any transmit side fault is detected.

Demod Fault:

De-energized when any receive side fault is detected.

Common Fault:

De-energized when any fault that is not explicitly a Tx or

 

Rx Fault such as an M&C or Power Supply Fault.

Open Collector Faults:

The UIM provides two Open Collector Faults that appear at Pins 28 & 10 on J8.

Mod Fault:

Will sink up to 20 ma (maximum) until a transmit or

 

common fault is detected. Will not sink current if a fault

 

is detected.

Demod Fault:

Will sink up to 20 ma (maximum) until a receive or

 

common fault is detected. Will not sink current if a fault

 

is detected.

The open collector faults are intended for use in redundancy switch applications in order to provide quick status indications.

TM051 - Rev. 5.8

3-5

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Paradyne DMD15L operation manual Terrestrial Loopback, Modem Status, Form-C Contacts, Open Collector Faults
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DMD15, DMD15L specifications

The Paradyne DMD15L and DMD15 are advanced digital modems designed to enhance communication in a variety of networking environments. As part of Paradyne's robust portfolio of networking solutions, these devices are engineered to deliver reliable and efficient data transmission over both copper and fiber optic connections.

One of the main features of the DMD15L and DMD15 is their capability to support Multiple Protocol Data Units (MPDUs), which enables them to handle a diverse range of network protocols seamlessly. This flexibility makes them suitable for different applications, from industrial automation to telecommunications.

These modems utilize advanced modulation techniques, such as Quadrature Amplitude Modulation (QAM), to maximize data throughput while maintaining signal integrity. This ensures that users benefit from high-speed connections, even in challenging signal environments. Furthermore, the DMD15 series incorporates Error Correction Codes (ECC) that enhance data reliability, effectively reducing packet loss and ensuring data coherence during transmission.

The DMD15L is particularly notable for its long-range capabilities, making it a go-to solution for users requiring extended distances without compromising data quality. It features built-in Adaptive Equalization, which automatically adjusts signal levels to optimize performance over varying transmission distances. This technology is crucial in maintaining consistent high-speed connectivity, especially in environments with variable conditions.

Both models are equipped with user-friendly interfaces that facilitate configuration and management. They support SNMP (Simple Network Management Protocol) for real-time network monitoring, allowing administrators to track performance metrics and identify potential issues before they impact users. The devices also include LED indicators for quick status checks, ensuring that users have immediate visibility of operational conditions.

In terms of physical characteristics, the DMD15 and DMD15L are designed for durability and ease of installation. They come in a compact form factor, making them suitable for deployment in constrained spaces. Additionally, their robust casing is built to withstand harsh environmental conditions, making them suitable for both indoor and outdoor installations.

Overall, the Paradyne DMD15L and DMD15 are high-performance modems that combine versatile technologies, reliability, and user-friendly features. They are excellent choices for organizations looking to enhance their communication capabilities and ensure robust data transmission across diverse networks. With their advanced functionalities and adaptability, these modems stand out as key components in modern network infrastructure.
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