Chapter 7, Hex E3/T3 Tributary Module

Table Of Contents

Hex E3/T3 Tributary Module

7.1  Functional Description of Module

7.2  Power Consumption

7.3  E3/T3 75 Ohm Electrical Interface

7.3.1  Description

7.3.2  Connectors

7.3.3  Compliance

Hex E3/T3 Tributary Module

7.1  Functional Description of Module

The E3T3-6 module contains six E3 interfaces. The E3 traffic is mapped into VC-3 containers and multiplexed together as described in Chapter 5, "Features." The interfaces can be configured to E3 or T3.

The physical connector for the interface is the miniature 1.0/2.3 type.The module does not contain any IP functionality.The interface supports transparent data (G.703).

7.2  Power Consumption

The power consumption of the E3T3-6 module is 11 W.

7.3  E3/T3 75 Ohm Electrical Interface

7.3.1  Description

The interface is a 34 Mbps E3 or 45 Mbps T3 interface (configurable) according to ITU-T G.703, 75 ohm coaxial interface.

7.3.2  Connectors

The connector used is a 75 ohm coaxial connector type 1.0/2.3. The screen on the input and output connectors is always DC coupled to ground.

Figure 7-1 E3T3-6 Connectors

7.3.3  Compliance

Table 7-1 E3 Interface Compliance

Standard

Comment

ITU-T G.703

Cable attenuation

Input reflection loss

Input port immunity against reflection

Output pulse mask

ITU-T G.783

Output jitter in the absence of input jitter

Output combined jitter

ITU-T G.823

Max. tolerable input jitter

Standard	Comment
ITU-T G.703	Cable attenuation Input reflection loss Input port immunity against reflection Output pulse mask
ITU-T G.783	Output jitter in the absence of input jitter Output combined jitter
ITU-T G.823	Max. tolerable input jitter