Alcatel Router Bedienungsanleitung PDF herunterladen (Seite 3)

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¬ Runs in background, periodically

collecting network ‘health’

information from OAM mechanisms

(such as VCCV) and monitoring for

problems (such as SLA transgressions)

These features, when under the

control of the Alcatel-Lucent 5620

management portfolio, ensure rapid

fault detection as well as efﬁcient

troubleshooting. In particular, SLAs

can be proactively monitored by the

SAA. This powerful capability allows

the speciﬁcation of test suites, policies

and schedules. The tests are then

auto-created, and the results obtained

are automatically compared to pre-

deﬁned SLA metrics. Any transgressions

detected are automatically reported

through the SAA to operations staff.

An auto-discovery protocol is sup-

ported to allow rapid commissioning

of remote devices.

Synchronization

Cell sites rely on the backhaul network

to provide synchronous interfaces for

the proper delivery of data. In addition,

cell sites may rely on the network

interfaces as stable references with

which to derive radio frequencies and

to ensure reliable subscriber handover

between cell towers. Accurate synchro-

nization is also important in wireline

networks in maintaining network

operational integrity; for example,

avoiding data underﬂows and over-

ﬂows and transmission ‘slips.’

The Alcatel-Lucent 7705 SAR supports

external reference timing, line timing,

adaptive clock recovery (ACR) timing,

synchronous Ethernet and also timing

distribution using 1588v2. The 1588v2

Master Clock and Boundary Clock

functions are also supported. Accuracy

and high performance of timing over

packet solutions, such as ACR and

IEEE 1588v2, are accomplished by a

combination of built-in architectural

features, efﬁciently tuned algorithms

and powerful QoS mechanisms to

minimize the delay experienced by

synchronization trafﬁc. These capabilities

are cornerstones of the design of the

Alcatel-Lucent 7705 SAR. A built-in

Stratum-3 clock is provided to assist in

synchronization maintenance during

unavailability of a primary source.

7705 SAR Family Chassis options

7705 SAR-F

The 7705 SAR-F is a ﬁxed conﬁguration

version of the Service Aggregation

Router packaged in a one-rack unit

(1 RU) high form factor that supports

up to 16 T1/E1 any service any port

(ASAP) ports. The ASAP ports can be

conﬁgured to support ATM, ATM IMA,

TDM and MLPPP. Six 10/100 Base-T

auto-sensing Ethernet ports are

provided, plus two further ports

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small form factor plug gable optics

(SFPs). Network uplink connectivity

options are: Ethernet, Fast Ethernet

(FE), Gigabit Ethernet (GigE), n × T1/ E1

MLPPP or n × T1/E1 ATM IMA. Integrated

DS3 point-to-point trunking is supported

using a SFP device.

Table 1. Features and benefits

FEATURES BENEFITS

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