Migrating from SS7 to SIGTRAN

Challenge

The existing global telecommunications infrastructure was originally built around SS7, a widely used signaling protocol that controls call set-up, tear-down, number portability, caller-ID and much more.   Despite efforts to move on, today much of the existing wireline and wireless telecommunications infrastructure continues to depend on SS7.

One significant ongoing issue is that SS7 relies on leased line DS1 circuits to interconnect service providers and their peers.  These DS1 circuits are becoming increasingly expensive to maintain, and in many cases (Verizon and AT&T), the circuits are no longer offered by interconnect carriers.

How then can service providers migrate SS7 to IP-based networks?

Solution

One solution that many service providers are implementing is a group of IP-based protocols defined by the IETF Signaling Transport (SIGTRAN) working group, designed to relay SS7 signaling over low-cost IP infrastructure.

As shown below, SIGTRAN is largely equivalent to traditional SS7 and outlines two protocol variants used to transport SS7 messages over IP networks. One variant is based on M2PA, while the other uses M3UA – we’ll discuss both here.

Comparison of the OSI network model, SS7, and the two SIGTRAN variants

Following the OSI model, let’s begin at the Physical layer and work our way up:

Ethernet and IP – providing both Physical and Data Link layers, as does virtually all other IP-based networks.

SCTPStream Control Transmission Protocol provides Transport layer functionality for SS7 messages, making sure SS7 messages are delivered and in the correct order.

M2PA – Message Transfer Part 2 User Peer-to-Peer Adaptation Layer is defined by RFC 4165,  facilitating transmission of SS7 MTP Level 3 messages via SCTP in a peer-to-peer arrangement.

M3UA – Message Transfer Part 3 User Adaption Layer is defined by RFC 4666, facilitating transmission of SS7 user messages (ISUP) via SCTP.

ISUPISDN User Part, used to set up and tear-down telephone calls

Given the two protocol options, which should you choose?  The decision usually falls to your SS7 service provider or the equipment you plan to interconnect.  As an example, Metaswitch CFS supports both M3UA and M2PA, making the decision pretty simple.

The Role of SS7 to SIGTRAN Gateways

There are many situations where traditional SS7 over TDM circuits would best be converted to one of the SIGTRAN variants, allowing a mix of new and old equipment and software to interoperate.

TelcoBridges offers the Tsig family of SS7/SIGTRAN signaling gateways, facilitating interoperability between the SIGTRAN variants and SS7. Tsig supports SS7, SIGTRAN, ISDN PRI, CAS R2, and T1 CAS protocol conversion as well as network diagnostics tools.

TSG3200

TSG800 Hardware Platform

Based on the TSG800 or TSG3200 hardware platforms, Tsig scales from a single SS7 signaling link to 64 links in a single 1U chassis, powered by either AC or -48V DC power.  With proven reliability, Tsig devices can be deployed fully redundant (1+1) providing high availability (HA) of over 99.999% availability.

SIGTRAN Use Cases

There are many use cases for SS7 and SIGTRAN in modern telecommunications networks – the most common are as follows:

Traditional SS7 TDM Connection

This diagram shows the typical SS7 implementation without SIGTRAN, showing redundant A-Links from an SS7 provider to a service provider switch via DS1 leased lines.

SIGTRAN M3UA over IP

An example of an SS7 service provider that supports M3UA, connecting over an IP network to a switch that also supports M3UA.

SIGTRAN M3UA to non-SIGTRAN Switch

A cost-saving architecture for older switches that do not support SIGTRAN, using signaling gateways to eliminate the expensive leased lines.  In this configuration, the SS7 provider uses an IP connection to deliver either SIGTRAN M3UA or M2PA signaling, while redundant TSG signaling gateways convert the signaling to traditional TDM SS7 A-links, compatible with older equipment.

SS7 A-Links to SIGTRAN-capable Switch

In situations where an existing SS7 provider needs to interconnect A-Links with a SIGTRAN-capable switch.  This architecture is common in situations where a new switch is deployed in a local, remote, or cloud platforms environments.

Hybrid SS7/SIGTRAN Links

A cost-saving approach for service providers is a hybrid SS7/SIGTRAN deployment, using the existing SS7 A-Link for the primary signaling path, while using SIGTRAN to carry the second/redundant signaling path.   With the rising cost of leased lines, this will significantly reduce costs while maintaining network diversity and reliability.

Benefits of Migrating to SIGTRAN

The benefits of integrating SIGTRAN into service provider networks includes:

  • Cost savings
    • Eliminate expensive DS1 leased lines
    • Reduce SS7 port costs
  • Reliability – IP Networks have greater reliability than dedicated leases lines, leveraging built-in redundancy and auto-healing
  • IP Networks offer virtually unlimited bandwidth, allowing multiple SS7 links to be carried on a single lower-cost IP network
  • Greater Flexibility
    • Connections and re-configurations are software-defined allowing for network reconfigurations on-the-fly
    • Greater options for SIGTRAN service providers, providing connectivity compatibility to older equipment or switches
    • Facilitates connectivity between legacy TDM SS7 circuits and virtualized or cloud-based switches

Learn More

You can learn more about TelcoBridges Tsig line of SIGTRAN signaling gateways at: https://telcobridges.com/products/signaling-gateways-tsig/

Request a consultation to learn more:

or send an email to sales@telcobridges.com

Bonus Video Content

Technical training by Marc St-Onge on SS7 to SIGTRAN migration:

In introduction to SS7 and SIGTRAN:

Signaling Gateway Solutions

Tsig Gateway in an NGN network

The Tsig is perfectly at home in an NGN network. It can deliver SS7 signaling to a centralized Softswitch or Media Gateway Controller.

This makes it an ideal replacement for any existing Signaling Gateways you may have that might be in their End-Of-Life (EOL).

 

H.248 / MEGACO

Provides connectivity to softswitch


SCCP Opcode routing & Global Title Translation [GTT]

Provides additional routing flexibility and control.


High-speed links [HSL] and low-speed links [LSL]

Allows for seamless integration into SS7 networks & existing infrastructure.


SS7

SS7 allows our gateways to be Seamlessly integrated with existing TDM infrastructure, greatly simplifying deployment and maintenance.


Low Risk, Reliability, and High Availability

TelcoBridges is committed to designing and manufacturing top quality gateways. With a reliability rating of 99.999% (five nine’s) and backed by full redundancy, available either in 1+1, or n+1 solutions, our gateways are the most reliable and stable available on the market. In fact, we invite you to contact our customer to verify for yourself, we have a flawless customer satisfaction and customer support rating. We stand by our customers because we understand that your success is our success.


 

 

Recommended Product

 

Media Gateway Solutions

The Tmedia Gateway is perfectly at home in an NGN network.

TelcoBridges’ Tmedia Gateway has a been deployed in Next Generation Networks (NGN) around the globe. Our gateways have been tested and deployed with several Softswitch vendors. Here are a few of our most trusted softswitch Partners, you can learn more about them in our partners section:

  • Teles,
  • Porta One,
  • Xener,
  • VSC,
  • Aloe,
  • Metaswitch,
  • Dialexia.

 

Any-to-Any

It can handle: TDM to TDM, TDM to VoIP, VoIP to VoIP,

Using various connector types for maximum flexibility: from E1/T1 to OC3/DS3 and STM1/OC3.


Low Risk, Reliability, and High Availability

TelcoBridges is committed to designing and manufacturing top quality gateways. With a reliability rating of 99.999% (five nine’s) and backed by full redundancy, available either in 1+1, or n+1 solutions, our gateways are the most reliable and stable available on the market. In fact, we invite you to contact our customer to verify for yourself, we have a flawless customer satisfaction and customer support rating. We stand by our customers because we understand that your success is our success.


High Capacity

Our Solutions offer very high capacity in order for you to maximize your operational savings. Savings in rackspace, power, maintenance, monitoring, sparing, and logistics all equal increased efficiency and greater margins.


Full VoIP Channel Capacity

By using the full capacity of the VoIP Channel you can simplify your network design and lower capital expenditures, again providing gains in efficiency.


Echo cancellation on all channels

TelcoBridges is committed to quality and this is reflected in our products as well. Echo Cancellation allows for higher voice quality and thus improves the quality of your services. TelcoBridges has Echo Cancellation on all channels for maximum voice quality to help differentiate you from your competition.


 

 

 

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NGN System in a box

NGN System in a box

TelcoBridges’ Gateways are designed from the ground up to serve as a multi-purpose platform. As such, our Gateways are capable of performing much more than simply acting as a media Gateway.

Thanks to its onboard SS7 stack, the Tmedia Gateway can not only route media, but also signaling, addressing SIGTRAN/SS7, TDM and VoIP media switching all in one box. This means that the use of a Softswitch is often not required. Not only is this type of solution more streamlined, but it is also far less expensive and vastly more efficient.

This means that one redundant Tmedia Gateway can fulfill the role of multiple pieces of “next Generation Network” (NGN) equipment, and as a result, enhance the performance, redundancy, and reliability of systems for a fraction of the cost of traditional Next generation network (NGN) Solution.

By delivering the TDM/SIP and SIGTRAN/SS7 gateway functionality without requiring additional third-party equipment, we’re able to reduce acquisition costs, and simplify maintenance requirements for our customers and our customer’s customers.

Any-to-Any

It can handle: TDM to TDM, TDM to VoIP, VoIP to VoIP.

Using various connector types for maximum flexibility: from E1/T1 to OC3/DS3 and STM1/OC3.


Low Risk, Reliability, and High Availability

TelcoBridges is committed to designing and manufacturing top quality gateways. With a reliability rating of 99.999% (five nine’s) and backed by full redundancy, available either in 1+1, or n+1 solutions, our gateways are the most reliable and stable available on the market. In fact, we invite you to contact our customer to verify for yourself, we have a flawless customer satisfaction and customer support rating. We stand by our customers because we understand that your success is our success.


SS7

SS7 allows our gateways to be Seamlessly integrated with existing TDM infrastructure, greatly simplifying deployment and maintenance.


High Capacity

Our Solutions offer very high capacity in order for you to maximize your operational savings. Savings in rackspace, power, maintenance, monitoring, sparing, and logistics all equal increased efficiency and greater margins.


Full VoIP Channel Capacity

By using the full capacity of the VoIP Channel you can simplify your network design and lower capital expenditures, again providing gains in efficiency.


Customer Testimonial

In today’s 24-hour economy, mobile communications capabilities play a critical role in our customer’s success, and it’s our responsibility to provide them with telecommunications solutions that are always on, without fail. By working with TelcoBridges, we’re able to meet the most rigorous demands of even our largest customers

Stijn Nijhuis, CEO of Voicework

 

 

 

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Next Generation Network Solutions [NGN]

TelcoBridges’ NGN solutions provide you with…

Reliability & Stability

TelcoBridges global coverage is growing all the time with new qualified partners, who undergo rigorous training, are signing on every month.Of course, our TelcoBridges customer success representatives are also at your disposal 24/7.Visit our partner section to find a local partner in your area, or our TB support section.

 

24/7 Support

TelcoBridges makes it a priority to provide the most effective service. Our dependable support team is available 24/7 to to help you out with your system or to answer any question you may have. You can always trust us to be there for you. Your success is our success.

 

Scaled capabilities

The Tmedia family of Gateways can scale from 1x T1/E1 connection with the TMG800 product, all the way up to 16x STM1 connection with the TMG7800. Furthermore, each unit can be remotely upgraded to its full capacity without manual intervention on the board.

 

Integration & Development

TelcoBridges understands that scaling or replacing your system can be a big investment. Our engineering development & integration professionals can help adapt or develop our solutions to match your specific needs. With TelcoBridges, you don’t just get A solution, you get the right solution made for YOU.

Tandem Switching (Operator)

Tandem Switching

Tandem switching consists of non-customer-facing switches that are configured to route traffic amongst themselves or to other switches for such purposes as capitalizing on preferential rates, etc.

TelcoBridges’ Tmedia gateway provide capabilities for tandem / class 4 switching by switching voice traffic between end-office switches and VoIP networks.

Our tandem / Class 4 switching solutions use SS7, provide flexible & extensive call routing, as well as providing CDR generation, and a non-blocking switching fabric.

Of course, as with all of our products and solutions you can expect top quality and reliability as well as fully redundant solution offering industry leading High Availability.

 

Operator solution Tandem Switching

 


SS7

SS7 allows our gateways to be Seamlessly integrated with existing
TDM infrastructure, greatly simplifying deployment and maintenance.


Flexible and extensive call routing

Our flexible and extensive call routing capabilities allows you to maximize your revenues by choosing the best call routes, as well alternatives routes.


CDR Generation

CDR generation ensure simple and easy billing.


Non-blocking switching fabric

Simplifies call route management, and reduces operating costs.


Low Risk, Reliability, and High Availability

TelcoBridges is committed to designing and manufacturing top quality gateways. With a reliability rating of 99.999% (five nine’s) and backed by full redundancy, available either in 1+1, or n+1 solutions, our gateways are the most reliable and stable available on the market. In fact, we invite you to contact our customer to verify for yourself, we have a flawless customer satisfaction and customer support rating. We stand by our customers because we understand that your success is our success.


 

 

Recommended Product

 

Lawful Intercept (Operator)

Lawful Intercept Solutions

Service providers perform lawful intercept activities to meet government mandated legal requirements.

The challenge for service providers has been to costeffectively meet lawful intercept requirements. Historically, this has meant deploying dedicated monitoring equipment which can be costly to acquire, deploy, maintain, and train.

TelcoBridges gateway have full ETSI 201 671 v2-1-1 compliant lawful interception capabilities built in. That means the same gateway unit that can route your Signaling, Media, or both your Signaling & Media, can also perform your lawful interception as well.

TelcoBridges Tmedia Gateways support Lawful Intercept according to ETSI standards 201 671 v2-1-1.

Our solutions comply with Lawful Intercept regulations, support VoIP, records the call details & voice recordings, and supports voice recording for non-ETSI deployments.


Regulations

Telcobridges Lawful intercept (LI) solutions are already compliant to regulations making it a low cost solution compared to other vendors who require additional equipment and complications.


VoIP Support

Our Lawful intercept solutions support VoIP which greatly facilitates the integration and implementation, as well as providing the ability to fulfill Law Enforcement Agency (LEA) requirements.


Recording of call details as well as voice

Our ability to record the call details as well as the voice allows us to fully comply with regulations.


​Non-ETSI deployments

For non-ETSI deployments our solution offers the ability to perform targeted voice recordings to comply with different regulations.

Recommended Product

International Gateway

International Gateway Solutions

International Gateway Operators can trust TelcoBridges’ Gateway products for converting Media (TDM/IP) to transport voice over the internet. Our solutions are SS7, have high capacity, and offer full VoIP channel capacity as well as Echo cancellation on all channels.

 

International Trunking

 


SS7

SS7 allows our gateways to be seamlessly integrated with existing TDM infrastructure, greatly simplifying deployment and maintenance.


High Capacity

Our solutions offer very high capacity in order for you to maximize your operational savings. Savings in rackspace, power, maintenance, monitoring, sparing, and logistics all equal increased efficiency and greater margins.


Full VoIP Channel Capacity

By using the full capacity of the VoIP Channel you can simplify your network design and lower capital expenditures, again providing gains in efficiency.


Echo cancellation on all channels

TelcoBridges is committed to quality and this is reflected in our products as well. Echo Cancellation allows for higher voice quality and thus improves the quality of your services. TelcoBridges has Echo Cancellation on all channels for maximum voice quality to help differentiate you from your competition.


Click here to go to International Gateway Solutions for Carriers.

Operator Solutions

TelcoBridges’ Operator Solutions provide you with…

 

Innovation and Agility

Boasting the highest density in the market, TelcoBridges’ innovative solutions and agile design & development, allows you to always stay ahead of your competition.

 

 

Integration & Development

TelcoBridges understands that scaling or replacing your system can be a big investment. Our engineering development & integration professionals can help adapt or develop our solutions to match your specific needs. With TelcoBridges, you don’t just get A solution, you get the right solution made for YOU.

 

Scaled capabilities

The Tmedia family of Gateways can scale from 1x T1/E1 connection with the TMG800 product, all the way up to 16x STM1 connection with the TMG7800. Furthermore, each unit can be remotely upgraded to its full capacity without manual intervention on the board.

 

24/7 Support

TelcoBridges makes it a priority to provide the most effective service. Our dependable support team is available 24/7 to to help you out with your system or to answer any question you may have. You can always trust us to be there for you. Your success is our success.

 

Reliability & Stability

We pride ourselves in designing and building the industry’s most Reliable & Stable Gateways. Take your network beyond five nines (99.999%) availability with our High Availability options such as 1+1 redundancy, n+1 redundancy, and power supply redundancy. At TelcoBridges we understand that each second of downtime is a second that goes unbilled.

 

Global Presence with Local representation

TelcoBridges global coverage is growing all the time, with new certified partners joining every month.

Of course, our TelcoBridges customer success representatives are also at your disposal 24/7.

Visit our partner section to find a local partner in your area, or our TB support section to learn more.


 

 

 

Recommended Product

 

Media Gateway Solutions

Media Gateway Solutions

TelcoBridges’ Tmedia gateways adopts media formats between different networks.

Tmedia VoIP Media Gateway

Any-to-Any

It can handle: TDM to TDM, TDM to VoIP, VoIP to VoIP,

Using various connector types for maximum flexibility: from E1/T1 to OC3/DS3 and STM1/OC3.


Low Risk, Reliability, and High Availability

TelcoBridges is committed to designing and manufacturing top quality gateways. With a reliability rating of 99.999% (five nine’s) and backed by full redundancy, available either in 1+1, or n+1 solutions, our gateways are the most reliable and stable available on the market. In fact, we invite you to contact our customer to verify for yourself, we have a flawless customer satisfaction and customer support rating. We stand by our customers because we understand that your success is our success.


SS7

SS7 allows our gateways to be Seamlessly integrated with existing TDM infrastructure, greatly simplifying deployment and maintenance.


High Capacity

Our Solutions offer very high capacity in order for you to maximize your operational savings. Savings in rackspace, power, maintenance, monitoring, sparing, and logistics all equal increased efficiency and greater margins.


Full VoIP Channel Capacity

By using the full capacity of the VoIP Channel you can simplify your network design and lower capital expenditures, again providing gains in efficiency.


Echo cancellation on all channels

TelcoBridges is committed to quality and this is reflected in our products as well. Echo Cancellation allows for higher voice quality and thus improves the quality of your services. TelcoBridges has Echo Cancellation on all channels for maximum voice quality to help differentiate you from your competition.


 

 

Recommended Product