Chapter 1 Introduction

FOM-E1/T1Installation and Operation Manual

 

 

Application

In the application illustrated, each FOM-E1/T1 receives E1 or T1 signals that are equalized to overcome electrical link distortion. FOM-E1/T1 then converts the E1 or T1 signals into an optical signal.

E1/T1

 

E1/T1

 

E1/T1

Coax

FOM-E1/T1

Fiber Optic

FOM-E1/T1

Coax

PBX

 

DACS

 

 

 

Figure 1-1 FOM-E1/T1 Application

Features

Fiber Optic Interface

Table 1-1details fiber optic interface types supported by FOM-E1/T1.

Table 1-1. Fiber Optic Interface Types

Wavelength

Fiber Type

Transmitter

Power

Receiver

Typical Max.

 

 

Type

 

Sensitivity

Range

[nm]

[m]

 

[dBm]

[dBm]

[km/miles]

 

 

 

 

 

 

850

62.5/125

VCSEL

-18

-38

5/3

 

multimode

 

 

 

 

 

 

 

 

 

 

1310

9/125 single

LED

-18

-40

38/24

 

mode

 

 

 

 

 

 

 

 

 

 

1310

9/125 single

Laser

-12

-40

50/31

 

mode

 

 

 

 

 

 

 

 

 

 

1550

9/125 single

Laser

-12

-40

100/62

 

mode

 

 

 

 

 

 

 

 

 

 

E1/T1 Interface

The electrical interface meets requirements of ITU G.703, G.824, G.921 and G.935 standards for E1 and T1.

FOM-E1/T1 supports both balanced and unbalanced interfaces.

FOM-E1/T1 conforms to all relevant ITU standards.

When FOM-E1/T1 detects electrical interface levels below G.703 electrical levels, the modem transmits an “All 1 signal” (AIS) to the optical interface.

Test and Diagnostics Capabilities

FOM-E1/T1’s built-in diagnostics comply with the V.54 standard.

FOM-E1/T1 features a dry contact alarm port for attaching an external alert device.

When an AIS is detected at the optical or electrical interface, the modem transparently converts the signal and alerts the user via front panel LEDs.

1-2 Overview

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RAD Data comm Application, Features, Fiber Optic Interface, E1/T1 Interface, Test and Diagnostics Capabilities

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.