The Past is Still Part of our PresentWhy the Legacy Matters Today

Guy Redmill

About UsA brief overview of Redmill Marketing Associates

• Outsourced marketing and strategic consultancy services for the TMT sector• Strategy• Communications• Analysis

• Deep knowledge of marketing and strategic needs of the TMT industries

• Clear, insightful communications and actionable marketing programmes

• An experienced, multi-skilled team to complement your in-house resources

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Moving to...an all IP World

• Network convergence around IP

• LTE adoption and deployment

• IMS and VoLTE

• Legacy Protocols are disappearing

• SIP is the future; SS7 is the past

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‘SS7 Signalling’how the search trend is evolving

Source: Google Trends

‘IMS’how the search trend is evolving

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Source: Google Trends

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But...there are problems

• Interconnection for transit• Traffic hubs and exchanges• Direct peering

• Interconnection with local partners• Traffic delivery / collection

• Migration to new core• NGN, IMS

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A Diverse WorldWith a multitude of protocols

• Heterogeneity is still the norm • Standardisation does not lead to uniformity• Interconnection is a diverse process

SIP

SIP-I

ANSI ISUP

SIP-T

French ISUPETSI ISUP

ISUPUK ISUP

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Network Reality‘Legacy’ is very much part of today’s networks

• SS7 is a requirement for many operators• It’s deployed, proven and reliable• It’s cheaper to leverage this asset in their core• There are long-established processes for interconnection

processes• Many Tier-1 operators prefer it

• While NGN / IMS deployment adoption continues, any international transit operator must be flexible

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Network RealityHow it works in practice

CarrierMunich

EndpointGlasgow

EndpointMoscow

EndpointRio

EndpointKarachi

EndpointBeijing

SIP

SIP

SIP

SIP-ISI

PSIP > ISUP R

SIP-I > UK ISUP

SIP > Chinese ISUP

SIP > Brazilian ISUP

SIP > Pakistan ISUP

Service ViewThe need to maintain existing services

• SS7 enabled many advanced services• Many of these generate significant revenue

• VPN• IN non-geographic

• You cannot • Simply turn them off willy-nilly• Ignore them when migrating to a new core

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In PracticeLegacy interconnect is essential

• Vendors with only an IP offer are limited• They must partner with vendors with SS7 capabilities

• Tier 1 view is a fraction of the real picture• It provides an alternative reality

• Worldwide, carriers, operators and service architects must confront operational heterogeneity on a daily basis

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Two examplesExample 1 - Squire Technologies

PBXIP

Other IP Sources

Private BranchEchange

Mobile Diallers

IPPhones

OTT/ Video

VoIPGateway

HDVoice

Service

Security

Traffic

Core

SignallingSIP, H.323, SIP-I, SIP-T, TCAP over SIGTRAN

Media - RTPVoice, Video, HDD, OTT, UC, IPx

DDoS, VPN, IPSec, SRTR, Registration, Authentication, RFC Interop

Registration, Avalanches, SIP Trunking, Critical Mass

Routing, Transcoding, Accounting, Regulatory, QoS

PBXIP

Other IP Sources

Private BranchEchange

Mobile Diallers

IPPhones

OTT/ Video

VoIPGateway

HDVoice

SignallingSIP, H.323, SIP-I, SIP-T, TCAP over SIGTRAN

Service

Security

Traffic

Core

Media - RTPVoice, Video, HDD, OTT, UC, IPx

DDoS, VPN, IPSec, SRTR, Registration, Authentication, RFC Interop

Registration, Avalanches, SIP Trunking, Critical Mass

Routing, Transcoding, Accounting, Regulatory, QoS

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Two ExamplesExample 1 - Squire Technologies

• Local Number Portability requirements in RSA• SIP core, but LNP / MNP must be via SS7 to database

• Added SBC to core with integrated SS7 over IP (SIGTRAN)• Local IP, national break-out via SS7• Stringent interop testing

• Scalable management of IP core and transit

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Two ExamplesExample 2 - Gintel AS

SIP

IMS/ Pre -IMS PSTNPLMN

database

Telco GradeApplication Server

Gintel Application Framework

Exposure Layer

Appl

icat

ion

Appl

icat

ion

Appl

icat

ion

Internet

Web Back End

Integration Server

Web Front End

Application Server

Web Server

Integration

NMS

Prov.

Billing

SS7 (INAP/CAP/ISUP)https

SIP

JDBC JDBC

Easy Designer AdministratorInterface

SIP

IMS/ Pre -IMS PSTNPLMN

database

Telco GradeApplication Server

Gintel Application Framework

Exposure Layer

Appl

icat

ion

Appl

icat

ion

Appl

icat

ion

Internet

Web Back End

Integration Server

Web Front End

Application Server

Web Server

Integration

NMS

Prov.

Billing

SS7 (INAP/CAP/ISUP)https

SIP

JDBC JDBC

Two ExamplesExample 2 - Gintel AS

• CAMEL triggers for Mobile PBX service• Service node approach is limited as all traffic must be terminated• GSM CAMEL provides more efficient route as service triggering can be

invoked• Preserves investment in CAMEL infrastructure• Reduces CAPEX as fewer terminating ports are required• Lower OPEX as transit costs minimised

• Realised through reverse IM_SSF• Delivering triggers from CAMEL and convering to SIP with relevant info content

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In ConclusionSumming up

• SS7 is a necessary element of today’s infrastructure• Even if Tier 1 core migrates to IP, legacy is fundamental to:

• Existing services• Interconnection and peering

• For Tier 2 and 3 operators:• Represents investment protection• National interconnection often prefers SS7

• Despite clear market trends, don’t ignore it• Adapt to local requirements and be flexible

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info@ redmillcommunications.com

@redmill_mktg

+44 (0) 203 137 2070

www.redmillcommunications.com

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ContactsHow to get in touch with us