Alcatel-Lucent Intelligent Services Access Manager Manuale utente

Alcatel-Lucent

ISAM Voice

For smooth migration to NGN/IMS

Alcate-Lucent ISAM Voice2

The Alcatel-Lucent Intelligent Services Access Manager (ISAM) Voice

component provides Voice over IP (VoIP) gateway functionality to

the Alcatel-Lucent ISAM family of products. With ISAM Voice, service

providers are able to connect customer premises legacy POTS or ISDN to

Next-Generation Networks (NGNs) and IMS networks. With the ISAM

family, operators can also deploy a converged broadband access network

that supports triple play rollout, including new services, such as Internet

Protocol TV, (IPTV) while migrating the legacy PSTN to an NGN/IMS

environment — key factors in successfully transforming access networks.

Alcate-Lucent ISAM Voice 3

Dealing with PSTN migration

As an incumbent service provider in an increasingly

saturated ﬁxed voice market, you face the declining

proﬁtability of your PSTN. With severe competition,

the average price per minute of voice calls is decreasing;

moreover, cable operators are offering attractive service

bundles; alternative VoIP providers are offering low tariffs

using third-party access networks, and some customers are

abandoning ﬁxed voice lines in favor of mobile phones.

At the same time, your operational costs are ﬂat at best,

with a trend to increase as the TDM network becomes

older and obsolete. In fact, the eventual cost of running

the network will no longer be justiﬁed by the revenue

the network generates.

To meet these challenges, you are looking to migrate your

PSTN to an IP network. Remaining competitive means

optimizing the delivery of traditional voice services while

creating an all-IP network capable of delivering new voice

and multimedia services. This dual-pronged strategy makes

sense. As broadband penetration continues to grow, you

can combine your investment in the modernization of the

PSTN with the building out of IPTV and high-speed

Internet access networks — two areas currently undergoing

substantial growth. Adopting an IP- and Ethernet-based

platform with the ﬂexibility of bringing ﬁber as close as

economically possible to the end user, will also let you

achieve your goal of converged voice and data access

networks, with minimum cost of ownership.

As part of their strategic initiative,

service providers should re-evaluate

current service offerings and product

lifecycles, and prioritize services to

be migrated onto next-generation

network architecture. It’s not efﬁcient

to migrate all services to the next-

generation network at the same

time — service providers should take

a step-by-step approach for network

optimization. Network optimization

should be based on increasing network

capacity and improving operational

efﬁciency.

YANKEE GROUP

Alcate-Lucent ISAM Voice4

IP Voice Transformation with Alcatel-Lucent ISAM Voice

Bundling opportunities with Alcatel-Lucent

ISAM during IP voice migration

PSTN transformation is driven by ﬁerce competition,

erosion of voice revenue, network obsolescence, IP network

transformation, bringing ﬁber closer to the end user, and

the desire to introduce new and compelling voice-related

services. As a result, you need a ﬂexible solution to act on

these challenges.

The Alcatel-Lucent IP-based ISAM — a major component

of both the Alcatel-Lucent Triple Play Service Delivery

Architecture (TPSDA) and the Alcatel-Lucent end-to-

end IP Voice solution — is ideally positioned for PSTN

network transformation.

Migrating legacy voice lines

For primary line migration, the Alcatel-Lucent ISAM

family provides a network-based voice solution that lets you

choose either SIP or H.248 as the signaling protocol. With

this network-based solution, packetization occurs in the

access node, so you don’t need to change end-user equipment

and the life-line support model (unlike the CPE-based

approach — the alternative method for voice access).

What’s more, the Alcatel-Lucent ISAM family offers superb

VoIP quality of service (QoS). With advanced queue man-

agement for voice delivery, strict priority over any other

service, you can rest assured of minimum transfer delay.

Together with the support of both SIP and H.248, this

advanced QoS implementation for voice, provides the

most ﬂexible path to IP voice transformation.

Delivering voice and data convergence

with broadband evolution

As you expand your broadband rollout to increase coverage

of IPTV while offering high-speed Internet access, you

can lower the cost of modernizing the PSTN. Your invest-

ment in a true Triple Play Service Delivery Architecture

(TPSDA) meets not only the challenge of obsolescence,

but also lowers operational expenses (OPEX) via uniﬁed

training and network management, as well as through

shared spares and software upgrades for voice and broad-

band services. In addition, your OPEX is lowered through

simpler bundled service offerings with self-proﬁling options

for your customers.

Alcate-Lucent ISAM Voice 5

With the Alcatel-Lucent ISAM family, you can also support

video penetration in ﬂexible deep-ﬁber scenarios. This en-

ables the optimum reuse of the copper plant and improved

subscriber high-capacity reach. With ISAM Voice, the

Alcatel-Lucent ISAM family also supports the deploy-

ment of legacy PSTN interfaces and NGN/IMS media

gateway functionality over the same platform in order to

facilitate network convergence without discontinuity in

subscriber offerings.

ISAM Voice components

As illustrated in Figure 1, the main hardware components

of Alcatel-Lucent ISAM Voice are:

•anintegratedvoicepacketserver(NVPS)forH.248

signaling that interfaces with the NGN/IMS network

through an H.248/Megaco signaling interface. In the

case of SIP signaling, the user agent is hosted on the

line termination card.

•Linetermination(LT)boardstointerconnectwithPOTS

lines, ISDN lines (basic access line terminations, BRA)

•Splittercards

Figure 1. ISAM Voice components

Voice Server (NVPS) POTS (NPOT) ISDN (NBAT) Splitters

Alcate-Lucent ISAM Voice6

What Alcatel-Lucent ISAM Voice offers

Alcatel-Lucent ISAM Voice compo-

nents provide PSTN-quality VoIP,

completing the future-safe, multiser-

vice ISAM access solution by enabling

innovative triple play services.

PSTN voice in an

NGN/IMS access scenario

In cases where customers decide

to migrate via a two-step approach,

Alcatel-Lucent ISAM Voice enables

the migration from NGN to the IMS

core with a simple software upgrade.

Carrier-grade voice

Alcatel-Lucent ISAM Voice leverages

comprehensive redundancy concepts

such as server/network card redun-

dancy, duplicate power distribution

to the line cards, multiple fans and

clock redundancy. On top of this,

failover mechanisms are available when

connecting to an IMS/NGN network

and lawful intercept is also supported.

A non-blocking architecture

The Alcatel-Lucent ISAM family

delivers superior-quality VoIP services

due to its treatment of packetized voice

trafﬁc. It applies strict priority schedu-

ling, assuring minimum delay and

premium VoIP quality. Moreover,

scalability is ensured because user

agents are distributed to the linecards.

Alcate-Lucent ISAM Voice 7

An advanced

IP/Ethernet platform

IP/Ethernet technology is at the core

of the Alcatel-Lucent ISAM family.

These technologies aggregate various

types of services from IP-enabled

line cards to a Gigabit Ethernet

core, including legacy POTS and

ISDN subscriber interfaces. This

approach ensures minimal delay for

voice, minimal cost regardless of the

service mix, the same operation for

any service, and pure IP/VLAN QoS

control, end-to-end.

One investment

to cover all needs

With Alcatel-Lucent ISAM Voice,

you don’t need to invest twice —

once in voice migration, and again

in broadband access. By using

Alcatel-Lucent ISAM Voice in the

Alcatel-Lucent ISAM family, the

CAPEX and OPEX spent migrating

the voice access network can also

create a broadband access footprint.

Minimized OPEX in

the installed plant

With ISAM Voice, you can also

minimize OPEX in the installed

plant. That’s because:

•Allservicescomefromasingle

multiservice IP/Ethernet access

node, resulting in cost-effective

maintenance, with minimal truck

rolls and inventory of spares

•Pre-cablingcombosolutionsand

zero-touch service provisioning

for xDSL services or voice services

deliver lower OPEX

•Allservicesaremanagedbyasingle

network management system, which

is fully compatible with the man-

agement of any type of Alcatel-

Lucent broadband portfolio.

Alcate-Lucent ISAM Voice8

Increased deployment ﬂexibility

With Alcatel-Lucent ISAM Voice,

you can also offer voice support

with the overlay of existing DSLAM

installations. Alternatively, you can

choose a pre-seeding strategy: ﬁrst,

by installing Alcatel-Lucent ISAM

in order to deliver xDSL, while pre-

cabling the rack to introduce POTS

or ISDN boards at a later stage. To

support this strategy, the ISAM plat-

form provides a complete and dense

variety of DSL transmission technol-

ogies (ADSL, ADSL2, ADSL2 plus,

VDSL2, S.HDSLbis). With a stan-

dardized concept for 24/48/72 port

assemblies, the wiring is independent

of the services provisioned on ISAM.

Additional cost-cutting through

central ofﬁce consolidation

With the Alcatel-Lucent ISAM family, you can also move

to more powerful broadband access equipment (with VDSL2)

capable of supporting higher bandwidth out of the central

ofﬁce (CO). By designing the access network on remote

outdoor housings, you can liberate space from COs, emp-

tying them eventually of all electronics.

You can also reach remote locations with ﬁber to the

most economical point. This reduces the operational

cost of running the voice access network. Just as good,

you can reduce the size of COs, or even choose to sell

them because they are sometimes located in high-cost

business districts and downtown areas. With this welcome

inﬂow of money, you can then invest further in core activities.

Future-safe investment

With Alcatel-Lucent ISAM Voice, you can also be sure

that your initial investment retains its value in the future.

Today, for example, voice line cards are software upgrade-

able to support ETSI TISPAN’s latest SIP standards.

In addition, the density of these line cards is regularly

expanded, increasing the density of the voice terminations.

With the ISAM architecture, you can also facilitate the

smooth introduction of new features, such as access border

gateway functionality, reinforcing its ﬂexibility and multi-

service capability.

Alcate-Lucent ISAM Voice 9

Key ISAM voice features

Signaling protocols

Alcatel-Lucent ISAM Voice implements H.248/Megaco

and SIP signaling to connect to NGN/IMS networks.

ISAM call control and trafﬁc

dimensioning with H.248/Megaco

Alcatel-Lucent ISAM Voice incorporates a separate

call control engine that can be centralized for as many

as 5,000 subscribers distributed in a number of access

nodes (using either the Alcatel-Lucent 7302 ISAM, the

7330 ISAM FTTN Remote Aggregator or the 7356 ISAM

FTTB Remote Expansion Module). The signaling gate-

way, or NVPS, is not overloaded with payload processing

as this is done in the line card itself. The NVPS handles

signaling events only, and supports up to 10 call attempts

per second.

Emergency calls with H.248/Megaco

Ten percent of the call capacity is always reserved for

emergency use, in addition to the 512 active, regular calls

handled by the NVPS with H.248. Because each line card

has its own user agent, ISAM can always initiate an emer-

gency call.

Voice trafﬁc prioritization

The line card packetizes voice trafﬁc into IP packets with

the highest IP priority. These packets are delivered to the

highest priority virtual local access network (VLAN) queue

of the Alcatel-Lucent ISAM. For voice trafﬁc, the strict

priority queue assures minimum delay.

Alcate-Lucent ISAM Voice10

Combo solutions

Voice lines provided by Alcatel-Lucent ISAM Voice can

be delivered from a combo shelf on which voice and DSL

are both provisioned. The combo shelf enables simpliﬁed

cabling with MDF, zero-touch service provisioning and

ﬂexible growth of voice or xDSL services.

Shortest-path routing for voice calls

Local voice calls (calls between two subscribers served

by the same Alcatel-Lucent ISAM node) are not routed

through the NGN backbone, thus decreasing transmission

and backbone capacity consumption.

Common shelves with any ISAM application

New Alcatel-Lucent ISAM Voice hardware and software

can be installed in existing or new Alcatel-Lucent ISAM

standard racks.

Line testing

Metallic Test Access (MTA) is supported for POTS. In-

tegrated line testing is also supported in conjunction with

the Alcatel-Lucent 5530 Network Analyzer, which facilitates

fully integrated narrowband and broadband testing.

Part of the end-to-end IP voice solution

As illustrated in Figure 2 Alcatel-Lucent ISAM Voice

is fully integrated with the rest of the Alcatel-Lucent

portfolio to offer end-to-end solutions for the NGN/IMS.

Layered on top of other Alcatel-Lucent products —

intended for the growth of the PSTN network or PSTN

legacy migration - ISAM Voice positions the Alcatel-

Lucent ISAM family, including the Alcatel-Lucent

1540 Litespan MSAN, as the access/voice gateway

for NGN/IMS deployments. These are focused on the

immediate introduction of triple play services. At the

same time, the fully standards-based Alcatel-Lucent

ISAM Voice supports multivendor triple play NGN/IMS

access opportunities.

Figure 2 . Alcatel-Lucent end-to-end IP voice solution

Broadband

IP endpoints

(new IMS

services)

AGW

Access node

VGW

Legacy

POTS phones

(PSTN

emulation)

Session

control

HSS

AGCF

Session

border/

controller

SIP

H.248

SIP Telephony

Application

Server

IMS core

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