RAD Data comm FCD-G703 Manual do Utilizador descarregar pdf (Página 2)

FCD

-155

STM-1/OC-3 Terminal Multiplexer

SDH/SONET

The STM-1/OC-3 interfaces are

user-configurable and provide a

high-quality and high-availability link as

well as performance monitoring of the

traffic path.

The STM-1/OC-3 link is supplied with an

SFP socket (see

Ordering

). It is strongly

recommended to order this device with

original RAD SFPs installed. This ensures

that prior to shipping, RAD has performed

comprehensive functional quality tests on

the entire assembled unit, including the

SFP devices. RAD cannot guarantee full

compliance to product specifications for

units using non-RAD SFPs.

The user can define the following

SDH/SONET clock sources:

• Internal

• Recovered from the STM-1/OC-3

interface, including automatic selection

based on SSM (Synchronization Status

Messaging)

• External E1.

FCD-155 features an optional 1+1 link

protection mechanism (unidirectional

MSP/APS) and SNCP path protection.

Maintenance capabilities include

user-activated local loopbacks and remote

loopbacks on the STM-1/OC-3 main link

and PDH tributaries.

ETHERNET

The 2-port 10/100BaseT or single-port

Gigabit Ethernet interfaces include a

built-in Ethernet bridge that supports

VLAN according to IEEE 802.1Q and

802.1p.

The 4-port transparent LAN extension,

without bridge functionality, creates a

total separation between customers, for

security. The maximum frame length is

2 kb.

The 10/100BaseT LAN interface features

autonegotiation for plug-and-play

Ethernet connectivity and complies with

IEEE 802.3/Ethernet V.2 standards. The

interface also performs VLAN stacking.

An optional Gigabit Ethernet interface

connects one LAN port to eight virtual

groups. This option extends LAN over

SDH/SONET networks with bridge

functionality. The maximum frame length

is 2 kb.

Ethernet traffic is mapped into

SDH/SONET containers using VCAT and

encapsulated with:

• Generic Framing Procedure (ITU-T

G.7041, ANSI T1-105.02), framed

mode

• Link Access Procedure for SDH/SONET

(LAPS) protocols following draft

recommendation ITU-T X.85/X.86.

Each user’s Ethernet traffic can be

mapped into SDH/SONET virtual containers

in any of the following ways:

• Up to 63 x VC-12, or 84 x VT-1.5

• 3 x VC-3/STS-1

• 1 x VC-4.

Ethernet traffic can be switched to

different bundles of virtually concatenated

VCs (up to 8 bundles) according to a

predefined group.

Link Capacity Adjustment Scheme (LCAS) is

implemented in compliance with the

G.7042 standard, which allocates

bandwidth according to Ethernet traffic.

SDH/SONET media transport basic

Ethernet packets of up to 1536 bytes for

connection to MPLS networks.

The Ethernet interfaces interconnect SAN

(Storage Area Networks) devices with

Ethernet packets of up to 2 kb.

Spanning Tree Protocol (STP) and Rapid

Spanning Tree Protocol (RSTP) support

Layer 2 ring applications.

Headquarters

Router

FCD

-155

Gigabit

Ethernet

8 x E

1/T1

STM-

1/OC-3

E1/

T1

E3/

T3

Branch 1

FCD-

155

Branch 7

Branch 8

ADM

PBX

SDH/SONET

ADM

ADM

FCD-155 FCD

-155

Figure 1. ADM in a Corporate Environment

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