Allied Telesis AT-2500 Series Guía de usuario descargar pdf (Pagina 61)

5-1

Telesyn Service Guide (Circuit Emulation Service (CES))

5. Circuit Emulation Service (CES)

5.1 Overview

In release 5.0, “Pass-thru” Circuit Emulation Service for both E1 and DS1 circuits is supported on the CES8 SM.

In Pass-Thru, the whole DS1/E1 frame is passed. The Telesyn does not terminate/interpret the FDL in Pass-Thru.

The only layer terminated at the MAP is the line layer.

5.2 Technology

Refer to the Telesyn Component Specification for DS1/E1 standards.

5.3 Features

Since Circuit Emulation is pass-through service, many of the features listed in are N/A. However, since DS1/E1

data is delay sensitive and is being sent over a packet network, there are some QoS and traffic management issues

that are highly important, and these ill be discussed in detail.

TABLE 5-1 Feature Interactions for Circuit Emulation Service

Feature Supported? Notes

Data Service

(VLAN) Y

(UFO) Y (VLAN

based)

(IGMPv2) Y

(HVLAN) N

(VLAN Translation) N

Multicast channels N/A

MAC Limiting N/A

MAC Configuration N/A

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Allied Telesis AT-2500 Series Guía de usuario Pagina 61