DMD15/DMD15L IBS/IDR Satellite Modem

User Interfaces

 

 

<SOURCE ID>:

The Source Identifier defines the multi-drop address

 

 

origin.

 

 

 

 

Note: All nodes on a given control bus have a unique

 

 

address that must be defined.

<DESTINATION ID>:

The Destination Identifier serves as a pointer to the

 

 

multi-drop destination device that indicates where the

 

 

message is to be sent.

 

 

<FRAME SEQUENCE NUMBER>:

The Frame Sequence Number (FSN) is a tag with a

 

 

value from O through 255 that is sent with each

 

 

message. It assures sequential information framing and

 

 

correct equipment acknowledgment and data transfers.

<OPCODE>:

The Operation Code field contains a number that

 

 

identifies the message type associated with the data that

 

 

follows it. Equipment under MCS control recognizes this

 

 

byte via firmware identification and subsequently steers

 

 

the DATA accordingly to perform a specific function or

 

 

series of functions. Acknowledgment and error codes are

 

 

returned in this field. 1 Byte for the DMD5000 protocol,

 

 

and 2 Bytes for the DMD15 protocol.

<DATA >:

The Data field contains the binary, bi-directional data

 

 

bytes associated with the <OPCODE>. The number of

 

 

data bytes in this field is indicated by the <BYTE

 

 

COUNT> value.

 

 

<CHECKSUM>:

The checksum is the modulo 256 sum of all preceding

 

 

message bytes, excluding the <SYNC> character. The

 

 

checksum determines the presence or absence of errors

 

 

within the message. In a message block with the

 

 

following parameters, the checksum is computed as

 

 

shown in Table 4-7.

 

 

 

 

 

 

 

 

Table 4-7. Checksum Calculation Example

 

 

 

 

 

 

 

 

BYTE FIELD

DATA CONTENT

 

RUNNING CHECKSUM

 

 

 

 

 

 

 

 

<BYTE COUNT> (Byte 1)

00h = 00000000b

 

00000000b

 

 

 

 

 

 

 

 

<BYTE COUNT> (Byte 2)

02h = 00000010b

 

00000010b

 

 

 

 

 

 

 

 

<SOURCEID>

F0h = 11110000b

 

11110010b

 

 

 

 

 

 

 

 

<DESTINATION ID>

2Ah = 00101010b

 

00011100b

 

 

 

 

 

 

 

 

<FSN>

09h = 00001001b

 

00100101b

 

 

 

 

 

 

 

 

<OPCODE> (Byte 1)

00h = 00000000b

 

00100101b

 

 

 

 

 

 

 

 

<OPCODE> (Byte 2)

03h = 00000011b

 

00101000b

 

 

 

 

 

 

 

 

<DATA> (Byte 1)

DFh = 11011111b

 

00000111b

 

 

 

 

 

 

 

 

<DATA> (Byte 2)

FEh = 11111110b

 

00000101b

 

 

 

 

 

 

 

TM051 - Rev. 5.8

4-45

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Paradyne DMD15L operation manual Source ID, Destination ID, Frame Sequence Number, Opcode, Checksum
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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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