DMD15/DMD15L IBS/IDR Satellite Modem

User Interfaces

 

 

the same command packet with the same <FSN> to the same receiver and waits once again for an acknowledgment or a NAK packet.

To reiterate, the format of the Link Level Protocol Message Block is shown below.

SYNC

COUNT

SRC

DEST

FSN

OPCODE

DATA

CHECKSUM

 

 

ADDR

ADDR

 

 

BYTES

 

4.9.2 Remote Port Packet Structure:

The Modem protocol is an enhancement on the DMD5000 protocol. It also uses a packet structure format. The structure is as follows:

<SYNC>:

 

Message format header character that defines the

 

 

beginning of a message. The <SYNC> character value is

 

 

always 0x16 (1 byte).

<BYTE COUNT>:

 

The number of bytes in the <DATA> field (2 bytes).

<SOURCE ID>:

 

Identifies the address of the equipment from where the

 

 

message originated (1 byte).

<DEST. ID>:

 

Identifies the address of the equipment where the

 

 

message is to be sent (1 byte).

<FSN>:

 

Frame sequence number ensures correct packet

 

 

acknowledgment and data transfers (1 byte).

<OPCODE>:

 

This byte identifies the message type associated with the

 

 

information data. The equipment processes the data

 

 

according to the value in this field. Return error codes and

 

 

acknowledgment are also included in this field (2 bytes).

<...DATA...>:

 

Information data. The number of data bytes in this field is

 

 

indicated by the <BYTE COUNT> value.

<CHECKSUM>:

 

The modulo 256 sum of all preceding message bytes

 

 

excluding the <SYNC> character (1 byte).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The Modem RLLP is not software-compatible with the following previous Radyne products: RCU5000 and DMD4500. These products may not occupy the same bus while using this protocol as equipment malfunction and loss of data may occur.

NOTE: When transmitting a packet at 9600 baud, the Remote M&C should ensure that the timeout value between characters does not exceed the time it takes to transmit 200 characters(200 msec). If this timeout value is exceeded, the equipment will timeout.

TM051 - Rev. 5.8

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Paradyne DMD15L Remote Port Packet Structure, Sync Count SRC Dest FSN Opcode Data Checksum Addr Bytes, Dest. Id, Fsn
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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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