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Paradyne DMD15L operation manual Operational Mode, Terrestrial Framing Drop Mode/Insert Mode

Models: DMD15 DMD15L

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DMD15/DMD15L IBS/IDR Satellite Modem

User Interfaces

 

 

n = 15, data rate = 960000 n = 16, data rate = 1024000 n = 20, data rate = 1280000 n = 24, data rate = 1536000

n = 30, data rate = 1920000 (valid with E1 Interface only)

4.6.2 Operational Mode

The Operational Mode of the Modem often determines which additional menus and displays are available for use by the operator. The D&I Mode-specific menus will not be displayed unless the Operational Mode of the modem is set to D&I. Therefore, the second step in configuring the modem should be to set the Operational Mode to D&I. At this point, the D&I specific menus in the Interface section will become available and will remain available until the Operational Mode of the modem is changed to something other than D&I. When the Operational Mode is changed to something other than D&I, the D&I specific menus will automatically disappear.

4.6.3 Terrestrial Framing - Drop Mode/Insert Mode

The Drop Mode Selection and the Insert Mode Selection identify the Terrestrial Data-Framing Format. As previously mentioned, their selection is influenced by the Modulator and Demodulator Data Rates, and trying to select a T1 Type Framing Format with a data rate of 1920000 bps will result in an error message. In turn, the selection of the terrestrial framing formats influences the satellite channel to terrestrial timeslot mappings in the following manner:

The selection of T1-D4, T1-ESF, or SLC-96 type terrestrial framing format limits the terrestrial timeslots to values from 1-24.

The selection of PCM-30 or PCM-30C type terrestrial framing limits the terrestrial timeslots to values from 1-15, 17-31. In these modes, terrestrial timeslot 16 is reserved for ABCD signaling and may not be dropped or inserted.

The selection of PCM-31 or PCM-31C type terrestrial framing limits the terrestrial timeslots to values from 1-31. Therefore, the terrestrial framing format should be identified via the Drop Mode and Insert Mode entries prior to editing the Drop or Insert satellite channel to terrestrial timeslot maps.

4.6.3.1 Insert Terrestrial Frame Source

The Insert Terrestrial Frame Source selection tells the Modem from where the Insert Terrestrial Frame is coming.

External:

Indicates that the terrestrial frame is to be input via the Insert Data In Port.

Internal:

Indicates that the modem needs to generate the terrestrial frame and that all non-

 

inserted timeslots need to be filled with the appropriate idle code based upon the

 

terrestrial framing (T1 or E1).

The selection of the Insert Terrestrial Frame Source also influences the Buffer Clock selection in the following manner:

When the Insert Terrestrial Frame Source selection is set to External, the received satellite data will be clocked out of the Doppler Buffer based upon the clock recovered from the insert data input. Therefore, the Buffer Clock selection will automatically be set to External and cannot be

TM051 - Rev. 5.8

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Paradyne DMD15L Operational Mode, Terrestrial Framing Drop Mode/Insert Mode, Insert Terrestrial Frame Source
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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.