FOM-E1/T1Installation and Operation Manual

Chapter 1 Introduction

 

 

 

 

 

 

 

 

 

1.2 Physical Description

FOM-E1/T1 is a compact unit, intended for installation on desktops or shelves. An optional rack-mount adapter kit enables FOM-E1/T1 installation into a 19-inch rack. Figure 1-2shows a 3D view of FOM-E1/T1.

Figure 1-2 FOM-E1/T1 3D View

The front panel indicates modem status. The front panel indicators and controls are described in Chapter 3.

The rear panel connectors and internal jumpers are described in Chapter 2.

1.3 Functional Description

This section describes the functional circuitry of the FOM-E1/T1 fiber optic modem. FOM-E1/T1 is used for transmission of E1 (2.048 Mbps) and T1

(1.544 Mbps) over multimode or single-mode fiber optic media. The unit is transparent to framing and can transmit data using any framing pattern with HDB3 or B8ZS coded signals.

Figure 1-3illustrates the FOM-E1/T1 block diagram.

LED

TD

RD

TC & RC

EXT CLK

DTE

Interface

External Clock

 

CDP

 

 

CDP to F/O

 

 

 

 

 

 

 

 

 

 

 

Encoder/

 

 

 

 

 

 

 

 

 

Decoder

 

 

AGC, Equalizer

 

 

 

 

 

 

 

 

 

Clock Recovery

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receive Clock

 

 

 

 

 

 

 

 

 

PLL

Transmit Clock

 

 

 

 

 

 

 

 

 

 

 

 

LED

F/O to CDP

Figure 1-3 FOM-E1/T1 Block Diagram

FOM-E1/T1 comprises the following signal processing stages:

Signal conversion

Data/clock recovery

Data transfer.

Functional Description

1-3

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RAD Data comm E1, T1 operation manual Physical Description, Functional Description

T1, E1 specifications

RAD Data Communication specializes in providing advanced networking solutions, particularly for E1 and T1 lines. These digital transmission systems are pivotal in telecommunications, allowing for efficient data transfer, voice communication, and multimedia services.

E1 and T1 lines are standardized digital circuits offering capacity for multiple channels. A T1 line, commonly used in North America, accommodates data transmission at a rate of 1.544 Mbps, while an E1 line, predominantly used in Europe and other parts of the world, supports a rate of 2.048 Mbps. Each line can carry multiple voice channels—up to 24 for T1 and 32 for E1—making them suitable for both voice and data services.

One of the main features of RAD's E1 and T1 solutions is their versatility. These lines can be utilized in various applications, including traditional telephony, private branch exchanges (PBXs), and modern Voice over IP (VoIP) networks. RAD's solutions enable users to seamlessly migrate from older systems to more integrated and efficient digital networks without sacrificing performance.

RAD Data Communication focuses on ensuring reliability and robustness in their E1 and T1 offerings. With built-in error detection mechanisms, such as cyclic redundancy check (CRC), these systems maintain high levels of data integrity. In addition, RAD’s devices often incorporate advanced features like Adaptive Rate Control, allowing for dynamic adjustments to accommodate varying network conditions.

Technology-wise, RAD integrates advanced protocols and features, such as Frame Relay and Multiprotocol Label Switching (MPLS), into their E1 and T1 equipment. This flexibility supports the transmission of diverse data types, ensuring users can transition smoothly between legacy systems and modern technologies.

Another characteristic that sets RAD's products apart is their management capabilities. Many devices come equipped with SNMP (Simple Network Management Protocol) support, enabling remote monitoring and management. This feature is essential for network administrators seeking to maintain optimal performance and quickly address potential issues.

Moreover, RAD's E1 and T1 solutions are designed for easy integration into existing network infrastructures. Their compact and modular design allows for straightforward installation and scalability, accommodating future growth and technology advancements without major overhauls.

In summary, RAD Data Communication’s E1 and T1 solutions are characterized by their reliability, versatility, and advanced management features. Designed to meet the evolving needs of communication networks, they ensure that users can take full advantage of both traditional and modern telecommunications technologies.