Alcatel-Lucent 1850 TSS-5 Manuale utente

Alcatel-Lucent

1850 TSS-5 Transport

Service Switch

Modular Aggregation and Transport Unit

Alcatel-Lucent 1850 TSS-5 Transport Service Switch2

The Alcatel-Lucent 1850 Transport Service Switch (TSS-5) is a carrier-grade aggregation

and transport device for meeting the changing needs of multiservice access networks.

This compact, modular optical transport switch is ideal for carrying circuits or Ethernet

over Time Division Multiplexing (TDM) or packet networks. Supporting any mix of trafﬁc,

from all-circuit to all-packet, it is ideal for use where TDM and Ethernet services coexist.

Alcatel-Lucent 1850 TSS-5 Transport Service Switch 3

The Alcatel-Lucent 1850 TSS Family

New bandwidth-hungry services, such as triple play and Ethernet virtual

private networks (VPNs), are placing great demands on the existing trans-

port infrastructure. To remain proﬁtable, businesses and service providers are

embracing these new revenue-generating services by moving from circuit-based

transport, using TDM, to packet-based transport, using Ethernet.

The new-services introduction is probably the most critical factor to a

service provider’s success. The increasing demand for bandwidth for these

new services is not reﬂected in comparable increases in revenue, presenting a

signiﬁcant business challenge. The Alcatel-Lucent 1850 TSS helps businesses

maximize their proﬁtability by transporting any service mix while keeping

strict control of the costs.

The Alcatel-Lucent 1850 TSS is a family of multiservice packet-transport

products supporting any mix of traffic, from all-circuit to all-packet. With

these products, businesses and service providers can build highly flexible

networks that transition from circuit to packet transport gradually, as

packet capacity is required, but without disrupting existing traffic or

paying for expensive overlay networks. The 1850 TSS family optimizes

network efficiencies by aggregating native signals and allowing transport

of both packets and circuits.

Alcatel-Lucent 1850 TSS-5 Transport Service Switch4

1850 TSS-5: Where TDM

and Ethernet Services Coexist

The 1850 TSS-5 is a compact, modular, optical transport

switch with the functionality to carry TDM trafﬁc from

1.544 Mb/s interface/2.048 Mb/s interface (T1/E1) to

optical channel level 12 (OC-12), and packet trafﬁc from

10 Mb to Gigabit Ethernet (GigE). It is recommended for

use where TDM and Ethernet services coexist.

Less than 125 mm (5 in.) tall, the 1850 TSS-5’s small

footprint is designed to extend optical transport to the

customer premises. It is ideal for mobility backhaul

from the cell site and for fiber-to-the-business (FTTB)

and end-user-access applications. The 1850 TSS-5 is

environmentally hardened, making it suitable for

mounting in outdoor cabinets or at cell towers.

Pseudo-wire support of circuit emulation services (CES)

makes the 1850 TSS-5 ideal for cell-tower backhaul and

the smooth transition from TDM to third-generation

mobile system (3G) and fourth-generation mobile system

(4G) networks. It has small form-factor pluggable (SFP)

optics, allowing the optics to be purchased separately

from the circuit packs and plugged in when additional

interfaces are needed. This design lowers initial capital

expenditures (CAPEX), making the 1850 TSS-5 capacity

easily scalable.

Flexible and efﬁcient aggregation and transport, meeting

the evolving needs of multiservice access networks.

Alcatel-Lucent 1850 TSS-5 Transport Service Switch 5

Multifunctional

Even by today’s competitive stan-

dards, the 1850 TSS-5 is distinctly

versatile and multifunctional.

Fast Ethernet (FE) trafﬁc can be

aggregated onto up to 4 GigE ports

and these ports can be electrical or

optical, depending on the available

or desired infrastructure. The 1850

TSS-5 supports carrier Ethernet

services such as point-to-point

Ethernet line (E-line) and virtual

Ethernet LAN (E-LAN) with robust,

standards-based quality of service

(QoS) and reliability.

The 1850 TSS-5 provides

high-speed optical transport for

OC-3 and OC-12 linear optical

extensions, while unidirectional

path switched ring/Subnetwork

Connection Protection (UPSR/

SNCP) switching can be used at

the synchronous transport signal

level 1 (STS-1), STS-3c and virtual

tributary (VT) 1.5 levels. Further,

only minimal provisioning is

necessary for private-line Ethernet

over synchronous optical network/

synchronous digital hierarchy

(SONET/SDH) links between two

end-points, typically just SONET/

SDH cross-connections. Standard

SONET/SDH loopbacks are also

supported, including terminal

loopback, facility loopback and

external optical loopback.

The 1850 TSS-5 has several

cross-connect capabilities, offering

network designers greater ﬂexibility

in directing trafﬁc ﬂow through

systems to support a wide variety

of customer applications using

two-way cross-connections. Where

a SONET/SDH ring is created,

protection switching is done

independently for each SONET/

SDH path. UPSR/SNCP rings

operate in an integrated, single-

ended fashion, eliminating the

need for complex, network-level

coordination in the effort to

restore trafﬁc.

Alcatel-Lucent 1850 TSS-5 Transport Service Switch6

Management and Performance Monitoring

Where required, the 1850 TSS-5 comes with a craft

interface terminal (CIT) that manages SONET/SDH

operations though a standard RS-232 or LAN port. A

full-featured graphical user interface (GUI) may be used

or, if preferred, transaction language 1 (TL1). Performance

monitoring is also provided and software upgrades can

be downloaded by FTP without a truck roll.

Various other functionalities such as Address Resolution

Protocol (ARP) and Internet Protocol (IP) tunneling are

also supported. For example, Proxy ARP support on

the Gateway Network Element (GNE) eliminates the

need to create static routes for routing the IP packets

from the access network to the embedded network.

Alternatively, customers can choose the Simple Network

Management Protocol (SNMP), if preferred.

Common Applications

•WirelessbackhaulusingEthernetorSONET/SDH

•EnterpriseaccessusingEthernetaggregationintoGigE

•Enterpriseaccessusingdigitalsignallevel1(DS1)/E1andGigEoverSONET/SDH

•Ethernetextensionwithinanexistingbuildingorcampus

•PrivatelineandprivateLANservicesandLANinterconnect

Alcatel-Lucent 1850 TSS-5 Transport Service Switch 7

Versatile Applications

1850 TSS-320

1850 TSS-15/100

1850 TSS-5

BSC/RNC

1850 TSS-5

Hybrid Optical/

Packet Aggregation

Cell Site MTSO Aggregation

Hub/Large Cell-Site

Aggregation

T1/E1 (Native and CES/PW),

Ethernet

T1/E1

Hybrid Optical/

Packet Access

BTS/Node B

Figure 1. Mobile Backhaul

Mobility Backhaul

The 1850 TSS-5 supports backhaul for all wireless technologies, including:

•CodeDivisionMultipleAccess(CDMA)

•GlobalSystemforMobileCommunications/UniversalMobileTelecommunications

System (GSM/UMTS)

•WidebandCodeDivisionMultipleAccess(W-CDMA)

•WorldwideInteroperabilityforMicrowaveAccess(WiMAX)

Mobility second-generation mobile system (2G) and 3G trafﬁc is accommodated using Ethernet or

SONET/SDH transport. In addition, its aggregation capabilities allow the 1850 TSS-5 to backhaul

multiple parallel networks simultaneously. With a SONET/SDH network, TDM trafﬁc is carried

in native mode and Ethernet is carried by industry-proven Ethernet over SONET/SDH (EoS).

As mobility trafﬁc and applications become increasingly data and IP oriented, Ethernet backhaul

networks become more attractive. The 1850 TSS-5 offers feature-rich Ethernet services of up to

GigE. (see Figure 1).

Alcatel-Lucent 1850 TSS-5 Transport Service Switch8

The 1850 TSS-5 supports graceful migration from

TDM 2G services to fast-growing Ethernet- and

data-oriented 3G services. With Ethernet back-

haul, the 1850 TSS-5 supports TDM trafﬁc by

CES. In CES, TDM is transported over Ethernet

by static multiprotocol label switching (MPLS)

pseudo-wires protected by bidirectional forwarding

detection (BFD), a form of label switched path

(LSP) protection.

By using the 1850 TSS-5, businesses avoid making

a premature SONET/SDH or Ethernet backhaul

decision. They can start with SONET/SDH

backhaul networks and move to Ethernet

backhaul as packet trafﬁc grows, transitioning

from TDM backhaul to Ethernet backhaul on the

same platform, where and when it makes sense.

Enterprise Services

The 1850 TSS-5 provides a low-cost solution for

offering high-speed access to small and medium-

sized enterprises. The 1850 TSS-5 provides

businesses and service providers with reliable

transport for both voice and data service. Figure 2

shows the 1850 TSS-5 placed in various buildings

with diverse multitenant units. Separate users have

distinct voice and data requirements, needing a

mix of DS1/E1 and Ethernet connections.

1850 TSS-5

MetroCore

OC-192/STM-64

OC-12/

STM-4

OC-3/

STM-1

GigE

1665

DMX

1850 TSS-320/100

1665

DMXtend

1665

DMXtend

1850 TSS-5 provides:

• DS1/E1

• 10/100 Mb Ethernet

1665

DMX

1665

DMXplore

OC-3/

STM-1

1850 TSS-5

Figure 2. Enterprise Access

Alcatel-Lucent 1850 TSS-5 Transport Service Switch 9

Figure 3 illustrates a low-cost solution for bringing high-speed access to small

enterprise customers, using DS1/E1 and EoS-protected OC-3 or OC-12 lines,

and aggregating Ethernet connections for transport over FE and GigE.

The 1850 TSS-5 collects trafﬁc from the multiple sources within the building,

aggregates them together and then transmits the aggregated trafﬁc by

SONET/SDH or Ethernet to basement-located customer premises equipment

(CPE) or even directly to the CO.

In this application, the 1850 TSS-5 again excels due to its small footprint and

its support of both TDM and packet. Within the building it supports greater

use of ﬁber, as opposed to copper, and enables EoS services such as virtual

LAN (VLAN) and Ethernet private lines. In addition, the 1850 TSS-5

supports both electrical and optical Ethernet interfaces, greatly increasing

network-design ﬂexibility.

1850 TSS-5

Metro CO/PoP

1665

DMXtend

1850 TSS-100/15

MPLS

OC-48/STM-16

OC-12/

STM-4 GigE

Figure 3. Ethernet Extension

For enterprise services, the advantages of installing the 1850 TSS-5 include:

•Savesspace,courtesyofthesmallfootprintandavoidingtheuseofseparatedataswitches

•Useslow-costberterminationsatthecustomersite

•Supportsavarietyofconnectiontypesandspeeds,offeringserviceexibility

•Offersremoteoperationsandmonitoringfromthecentralofce(CO)

•ProvidesSONET/SDH-basedprotectionforbothvoiceanddata

Alcatel-Lucent 1850 TSS-5 Transport Service Switch10

Transition to the Future

The 1850 TSS-5 is a compact, feature-rich network element, small

enough and with sufﬁcient environmental hardening to operate in

hostile environments such as cell sites, and in virtually any CPE

situation. It is designed for the aggregation and transport of multiple

types of trafﬁc by the most cost-effective means possible, offering

service providers and businesses an easy and affordable way

to migrate from existing legacy architectures to service-enabled,

packet-based architectures.

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