Alcatel 5070 SSG
Signaling Server Global
(ANSI Version)
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OPENING UP
REVENUE-GENERATING SERVICES
Designed as a full-featured high-speed packet
switch, the Alcatel 5070 SSG ANSI receives,
routes and transmits signaling messages for
call setup, wireless and intelligent network
(IN) services.
With Release 20, the Alcatel 5070 SSG ANSI
introduces a rich set of applications to support
Mobile Number Portability and Wireless Number
Portability, as well as features to help manage
multiple home location registers (HLRs), short
message service centers (SMSCs) and voice
mail systems (VMSs).
The Alcatel 5070 SSG ANSI is a powerful,
compact system combining traditional signaling
transfer point (STP) functionality with advanced
routing functions, to support the expanding
Number Portability and wireless markets. In
addition, the product provides increased levels
of connectivity, capacity and expandability
over previous products, making it a true next-
generation STP. It is feature rich, with traditional
SS7 features on a platform that also supports
large-capacity services databases. The Alcatel
5070 SSG ANSI is not only a great fit in a legacy
circuit-based network, but also delivers the
capacity and interfaces to support the signaling
gateway requirements of voice-over-packet (VoP)
and 3G networks.
Implementing federally mandated Local and
Wireless Number Portability, as well as other
IN applications, means increased demands
on signaling network capacity. The Alcatel 5070
SSG ANSI reduces the impact of high network
transaction services by supporting High-Speed,
1.536-Mb/s ATM-over-T1 (ATM/T1) Links,
and high-capacity virtual SS7 over IP (SS7/IP)
Links. These two forms of High-Speed Links
offer connectivity with fewer transmission
facilities; reduce signaling latency for faster
signaling response time; and provide higher
message capacity, overcoming signaling link
set limitations. Providers have these network
benefits without sacrificing SS7 connectivity
and signaling.
ALCATEL
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FEATURES
The Alcatel 5070 SSG ANSI serves as a transport
system to provide reliable transfer of Message
Signal Units (MSUs) between network locations
and across network fabric transitions. With the
flexibility of this product, carriers can address
expanded capacity and connectivity needs,
continue to offer a wide variety of applications
in the SS7 network, and bridge directly to packet
networks.
handling volume between the SS7-based
networks and IP-based networks where the
message capacity exceeds that of SS7 link sets.
The Alcatel 5070 SSG ANSI provides an IP
signaling link that replaces many SS7 links.
Gateway Screening is available on the SS7 side
of the interface to protect the IP network from
unauthorized access by SS7 network elements.
IPVHSLs also provide an alternative form of
high-speed link connectivity within SS7 networks
to support high capacity B, C and D links between
STP nodes, as well as A links to service control
points and HLRs.
High Capacity
To support basic functions such as Message
Transfer Part (MTP), Signaling Connection
Control Part (SCCP), and the signaling gateway
function, the Alcatel 5070 SSG ANSI offers
the following features and services.
The Alcatel 5070 SSG ANSI includes SS7-IP
protocols as defined by the Internet Engineering
Task Force (IETF) SIGTRAN working group.
The base protocol layer is SCTP, with multiple
adaptation layers such as M2PA, M3UA, SUA and
M2UA, depending on the network application.
The initial adaptation layer implemented is M2PA.
IP Signaling Links
IP signaling links, or IPVHSLs, allow the Alcatel
5070 SSG ANSI to act as the signaling gateway
between SS7-based and IP-based packet networks.
High capacity IPVHSLs support growing call
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ATM/T1 High-Speed Links
T1 cards support signaling ATM adaptation layer
(SAAL) for transport of ATM messages to MTP
layers (MTP2 and MTP3) of the SS7 protocol,
as shown in Figure 1.
Intelligent network applications require increasing
network capacity. By supporting High-Speed
Links (HSLs), as shown in Figure 1, the Alcatel
5070 SSG ANSI provides connectivity with fewer
transmission facilities, reduces signaling latency
for faster signaling response time, and delivers
higher message capacity, overcoming signaling
link-set limitations. The Alcatel 5070 SSG ANSI
gives providers these network benefits without
sacrificing SS7 connectivity and signaling.
Flexible Routing
Flexible Routing is Alcatel’s patented message
detection and routing framework for the Alcatel
5070 SSG ANSI. Within this framework, the
Alcatel 5070 SSG ANSI can perform numerous
type of applications, such as Number Portability
or Application Location Register (ALR).
Figure 1 - Alcatel 5070 SSG High-Speed Link Capability
SCCP
GTT DB
MTP3
Routing
MSU
Queues
MSU
Queues
SS7/IP
8 Virtual Connections
100Base-T
56 kb/s Link
56 kb/s Link
56 kb/s Link
ATM/T1
1,536 Mb/s Link
Low-Speed
Links
High-Speed
M2PA/SCTP
or SAAL
Links
MTP2
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Number Portability
is a key issue for
competition in the
telecom industry.
A powerful component of the Alcatel 5070
SSG ANSI’s database capabilities is its high
transaction rate capability.
Number Portability
Due to the deregulation of the telecommunications
market, mandated Number Portability (NP) is a key
issue for competition in the telecommunications
industry. The Alcatel 5070 SSG ANSI combines
its traditional capabilities of message transport
and control with an NP solution, providing the
NP network database and service logic to support
ported number translations. Since the NP function-
ality is integrated within the Alcatel 5070 SSG
ANSI, service providers have quick and efficient
call routing with lower implemen tation costs —
because the queries are handled locally rather
than in a separate network node.
The Alcatel 5070 SSG ANSI supports up to
50 million database entries, allowing for multiple
co-resident databases to be hosted on the same
platform. This means that a service provider
can support an entire national Local Number
Portability (LNP) database on a single Alcatel
5070 SSG ANSI or can support multiple ALR
database types on the same Alcatel 5070 SSG
ANSI.
The Alcatel 5070 SSG ANSI uses high performance
database cards capable of supporting up to 2,500
transactions per second per card. The transactions
can be run in parallel, for a total of more than
160,000 transactions per second.
The Alcatel 5070 SSG ANSI gives operators the
ability to deploy unrestricted network intelligence,
maintaining independence from switching equip-
ment. Figure 2 illustrates the NP application.
Figure 2 - Number Portability
Query
Intermediate
Switch
Response
Signaling
Server
Customer,
Original
Location
Customer,
New
Location
End
Office
End
Office
End
Office
Calling
Party
Called
Party
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Number Pooling
the block holder, and the owner of the NPA-
NXX is called the code holder. A code holder
surrenders unused blocks to the pool, which
may then be assigned to another service
provider. The service provider owning the block
assigns a location routing number (LRN) for
all numbers within that block. The LRN is
used to route the call to the service provider
(destination). Any number within a pooled
block can port to another service provider.
Therefore, any given 10-digit telephone number
can be ported, pooled, both ported and pooled,
or neither ported nor pooled.
ALR routing locates and
routes customer service
queries, facilitating
Local exchange carriers require a central office
(CO) code per rate center. As a result, there is
an increasing incidence of CO code exhaustion
requiring the associated numbering plan area
(NPA) splits and overlays. Currently, the CO
codes, NPA-NXX, are assigned to carriers at the
10,000-block level. At this level, the telephone
number utilization tends to be inefficient in
sparsely populated rate centers or in switches
that do not have many subscribers. As a result,
area codes are split even though numbers
remain unused. The goal of Number Pooling is
to promote better number utilization, thereby
avoiding additional area code splits. Number
Pooling addresses this use by using 1000-block-
level Number Pooling to avoid NPA splits.
communication across
the network to all
wireless service nodes.
Table 1 shows some examples of ALR routing.
Table 1 - Types of ALR
Type of ALR
ALR for HLRs
ALR for SMSCs
ALR for VMSs
Used for
The Number Pooling feature provides for
the assignment of numbers in blocks of 1,000.
These 1,000 numbers are considered pooled.
The owner of the 1,000 number block is called
HLR routing
SMSC routing
VMS routing
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Gateway Screening
helps preserve
network integrity
by preventing
unauthorized
access.
The Number Pooling feature provides the
functional capability to support 1,000-block
Number Pooling in the LRN and Global Title
Translation (GTT) databases with a routing
functionality similar to LNP. To route a call,
the originating switch launches an LRN query
to obtain the LRN of the called number. The
Alcatel 5070 SSG ANSI must determine the LRN,
which may require two database lookups: one
to determine if a number is ported, and if it is
not ported, another to determine if it is pooled.
Application Location Register
In today’s environment, wireless service
providers must pace network growth with an
increasing number of subscribers and complex
services. The Alcatel 5070 SSG ANSI features
Application Location Register (ALR) routing,
shown in Figure 3, to allow a more efficient
usage of multiple HLRs, SMSCs and voicemail/
unified messaging systems.
With ALR routing, the Alcatel 5070 SSG ANSI
locates and routes customer service queries
to the proper network node, facilitating
Figure 3 - ALR Routing
Multiple Alcatel SCP/
5070 SSG
HLR Databases
Subscriber
ALR
Databases
MSC
Multiple
Alcatel SMSCs
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communication across the network to all
wireless service nodes. ALR for HLRs supports
a significantly better usage of HLR capacity and
allows a separation of the mobile identification
number (MIN) from the mobile directory number
(MDN). In addition, with ALR for SMSCs and ALR
for VMSs, the Alcatel 5070 SSG ANSI can provide
Flexible Routing to SMSCs and voice mail/unified
messaging systems, respectively. This enables
new services on dedicated nodes for a particular
group of subscribers.
TCAP portions of the signaling message, to
identify the subscriber and translate the network
address of the node handling a subscriber’s
service, such as the HLR. ALR routing enables
the Alcatel 5070 SSG ANSI to respond to queries
for updating subscriber location, sending routing
information or forwarding short messages. The
ALR implementation supports IS-41 as well
as GSM-based networks.
An interface to external provisioning systems
handles transactions for activating subscriber
records and establishing HLR, SMSC and
other subscriber routing information.
ALR routing uses a specialized database, coupled
with software to decode fields in the SCCP and
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Global Title Translation
Increasing competition and globalization
of the telecommunications market prompted
requirements for monitoring, measuring and
controlling access between SS7 networks.
Consequently, the Alcatel 5070 SSG ANSI Gateway
Screening feature has become increasingly
important to ensure network security.
Intelligent networks and wireless switching
systems often do not perform Global Title
Translation (GTT) efficiently. When services such
as enhanced 800/900, virtual private networks
and HLRs are triggered, the switches suspend
call processing and launch a query into the
network toward the adjacent STP. The message
contains address information that determines
the GTT to be performed. When services are
distributed across multiple service control points
or HLRs, GTT provides efficient routing and
redundancy. Keeping the GTT information in
a central pair of STPs supports efficient and
flexible operation of the network. The Alcatel
5070 SSG ANSI provides the powerful, real-time
processing necessary to meet these GTT
requirements.
The Gateway Screening feature allows for
message traffic based on commercial agreements.
This feature provides operators with the ability
to protect against unauthorized traffic between
networks, to protect against malicious and
unauthorized access to the network, and to
collect measurements on traffic screening
results. The Alcatel 5070 SSG ANSI provides the
ability to screen messages as they are received.
Gateway Screening prevents unauthorized
access to databases and prevents use of unleased
facilities and services. In the screening process,
the MTP and SCCP parts of the message are
Gateway Screening
The Alcatel 5070 SSG ANSI acts as a gateway
for messages transferred between networks.
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ALCATEL
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examined to determine if the message can be
processed. Gateway Screening enables a network
management mechanism to prevent unauthorized
access, and thus protects network integrity.
having to change destination point codes and
adjacent node point codes, subtending and
interconnected elements retain their routing
definitions, while the new system is introduced
into the network via facility switchovers.
Multiple Originating Point Code
The Alcatel 5070 SSG ANSI supports Multiple
Originating Point Code definitions, which allow
link sets to have a different adjacent point code
definition than the main STP point code. This
flexibility allows for ease of installation into
networks in which the Alcatel 5070 SSG ANSI
is replacing previously installed STP systems,
and in cases where network signaling is being
consolidated to a smaller set of STP systems
to provide economic savings in operations
and maintenance.
OSS Interfaces
The Alcatel 5070 SSG ANSI provides interfaces
to Telcordia operations support systems (OSSs)
for SS7 routing provisioning, LNP provisioning,
data collection and monitoring. The system
includes functionality based on GR-310 and
GR-778 for interface to the Telcordia Signaling
Network Activation Manager and the Telcordia
Network Performance Manager. Also, a CMISE
interface for LNP provisioning either to the
Signaling Network Activation Manager or to
an LSMS is provided per SR-4384. In addition
to monitoring capability, the system provides a
serial logging channel interface for delivery of
alarm and user interface command information.
This functionality allows introduction or
consolidation of new STP systems into the
network without impact to subtending and
interconnected network elements. Rather than
ALCATEL
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WHY ALCATEL?
Alcatel is the STP vendor of choice for
Alcatel 5070 SSG ANSI replaces, supports
major networks. The Alcatel 5070 SSG ANSI
is a natural progression to next generation
signaling services, offering customers all of
the SS7 features currently available on existing
STPs. This allows customers with existing STP
networks to augment or migrate seamlessly to
the Alcatel 5070 SSG ANSI with SS7/IP signaling
gateway functionality while providing
a maximum of 720 DS0 links and 14 million
database entries.
The Alcatel 5070 SSG ANSI is the only product
on the market that supports a link count with
growth to the multi-thousand range with the
throughput capacity to support these link
quantities without performance degradation.
For those with existing Alcatel INfusion STP
products, the evolution scenario allows retention
of investment in existing plant while expanding
into the next generation realm. And with support
for 50 million database entries and transaction
rates starting at 2,500 transactions per second,
the Alcatel 5070 SSG ANSI provides significantly
higher database capacity than the previous
generation Alcatel INfusion STP A.
transparent, legacy STP services.
The Alcatel 5070 SSG ANSI can be deployed
in many network scenarios.
Capacity
Many customers with networks of legacy STPs
have reached link connectivity and capacity
limits. The Alcatel INfusion STP A, which the
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ARCHITECTURE
Packet Overlay
support very large numbers of links with
Network Consolidation
unequaled reliability and capacity to facilitate
consolidation.
Customers interested in operational and/or STP
consolidation cost reductions from their legacy
STP networks can utilize the greater capacity of
the Alcatel 5070 SSG ANSI to fold multiple existing
STPs into a single platform. Public switched
telephone network (PSTN) circuit-based networks
designed six to ten years ago typically located
STPs in geographic regions based on carrier
transport costs at the time. Carrier transport
costs have been declining for several years,
eliminating the cost-effectiveness of having many
small STPs, each requiring maintenance and
yearly software/hardware upgrades. As shown
in Figure 4, the Alcatel 5070 SSG ANSI can easily
Many customers with existing circuit-based
networks are planning to implement overlay VoP
networks. These customers will require additional
SS7 link connectivity and capacity from their
legacy STPs to support the new overlay VoP
networks. Most legacy STP networks will not
have the available capacity or connectivity to
support both a circuit-based and a VoP network.
The hardware costs alone to upgrade legacy
STPs to support an additional overlay network
will make the Alcatel 5070 SSG ANSI a cost-
effective alternative.
Figure 4 - MOPC Network Consolidation
Network 2
Network 1
Network 3
Part. 1
SPC=a
Part. 2
SPC=b
Part. 3
SPC=c
Part. 0
SPC=x
5070 SSG
Joint IN,
NP, etc.
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In Figure 5,
The Alcatel 5070 SSG ANSI provides:
> Flexible Routing to network
elements
Figure 5 - Alcatel 5070 SSG with SS7 and SS7/IP
Connections
> IP provides:
• Low-cost packet transport
• High-capacity broadband
transport
SS7
SS7
> Interworking between the SS7
network and IP network elements
> Support for revenue generating
enhanced services
SCP
SSP
• High-Speed SS7 Virtual Links
> SS7 provides:
TDM Network
• Network control
5070 SSG
(STP)
• Connection management
• Reliable real-time delivery
• Network status/link state
Figure 6 shows the Alcatel 5070
SSG ANSI in a packet network.
IP Network
SS7/IP
SS7/IP
SS7/IP
SCP
HLR
VM
Figure 6 - Alcatel 5070 SSG in the Packet Network
Application Media
Server Server
5070 SSG
OSS/NM
SS7/IP
Service Layers/IN
Signaling Layers
Centralized Control
Control
Softswitch
Softswitch
WGW
WGW
TGW
TGW
TGW
TGW
WGW
WGW
PSTN
PSTN
Transport/
Media
Distributed
Switch/Router
AGW
RGW
RGW
AGW
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A GOOD FIT
The Alcatel 5070 SSG ANSI is a good fit
for a variety of service provider types.
Long Distance Carriers (LDCs) — CLDC and
XLC LDCs can use the Alcatel 5070 SSG ANSI
either to consolidate their STP networks or to
enter new markets. The Alcatel 5070 SSG ANSI
can also be used to provide signaling services
for LDCs moving towards converged networks.
Flexible interfaces allow LDCs to provide
signaling services for data, voice or converged
networks.
Incumbent Local
Exchange Carriers
ILECs can use the Alcatel 5070 SSG ANSI to
consolidate their existing STP infrastructure,
thereby minimizing maintenance and operational
overhead. The Alcatel 5070 SSG ANSI can also
be used to provide signaling services for ILECs
moving towards converged networks. Its flexible
interfaces allow ILECs to provide signaling
services for data, voice or converged networks.
Smaller Carriers
Smaller service providers benefit from the
Alcatel 5070 SSG ANSI’s ability to host a number
of database applications and a large number
of links in a single frame configuration.
Competitive Local
Exchange Carriers
CLECs can deploy a pair of Alcatel 5070 SSG
ANSIs to offer SS7 services in new markets
at minimal cost. The Alcatel 5070 SSG ANSI
is extremely cost-effective, as well as scalable,
so it is the perfect signaling solution for CLECs.
Flexible interfaces allow CLECs to provide
signaling services for data, voice or converged
networks for their own use or to provide
these services for other carriers.
Wireless Carriers
Wireless carriers can use the Alcatel 5070
SSG ANSI to provide wireless world roaming
with next generation technologies. Alcatel’s
comprehensive ALR implementation provides
wireless carriers a tool for flexible and efficient
network operation, covering HLRs, SMSCs
and voice mail/unified messaging systems.
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Alcatel and the Alcatel logo are registered trademarks of Alcatel. All other trademarks
are the property of their respective owners. Alcatel assumes no responsibility for the
accuracy of the information presented, which is subject to change without notice.
© 09 2003 Alcatel. All rights reserved.
3CL 00469 0408 TQZZA Ed.02 17320
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