3Com E3 manual Interface Specifications, Console Port, Ports

Models: E3

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A-2APPENDIX A: TECHNICAL SPECIFICATIONS

Interface

Specifications

Console Port

 

Electrical Specification:

RS-232-C (EIA/TIA-232-E standard)

 

 

 

 

Connector:

RJ-45, 8 position modular jack

 

 

 

 

Configuration:

Data Terminal Equipment (DTE)

 

 

 

 

Transmission Method:

Unbalanced RS-232

 

 

 

 

Transmission Rate:

38,400 bps maximum

Line A and Line B E3

 

 

 

 

 

 

Ports

Electrical Specification:

E3 interface

 

 

 

 

Connectors:

BNC coaxial connectors; one transmit (TX) and

 

 

one receive (RX)

 

 

 

 

Transmission Media:

75 ohm (nominal impedance) coaxial cable

 

 

 

 

Timing Source:

User selectable between:

 

 

Internal

 

 

Network

 

 

 

 

Framing:

ATM Direct Mapping (ADM)

 

 

Physical Layer Convergence Protocol (PLCP)

 

 

 

 

Line Coding:

High Density Bipolar 3 Zeroes (HDB3)

 

 

 

 

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3Com E3 manual Interface Specifications, Console Port, Ports