VeriSign IP Connect Connecting communities of interest

Internet Telephony Conference (VP-02 and VP-03 Sessions)

Sean Kent – Product ManagerEmail: skent@verisign.com

Tel: (703)346-9907

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Agenda

Technical Issues of VoIP Peering

(VP-02) Thursday 01/26/06 12:30-1:15PM

VoIP Peering Business Case Studies

(VP-03) Thursday 01/26/06 1:30-3:15PM

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VeriSign Know-How

Long history of proving peering services▪ Recent acquisitions inter-carrier mobile messaging

Inter-carrier short messaging (SMS) experience▪ Taught mobile operators it pays to cooperate▪ VeriSign practiced in core components of peering

VoIP peering products (IP Connect) launched Fall’04▪ Peering across broadband, cellular and enterprise networks

Integration of company assets “One VeriSign” initiative ▪ Dot-com/-net DNS registry platform▪ SS7 network and databases ▪ Inter-carrier roaming and messaging

Directory SecurityConnectivity Mediation

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Lessons Learned

Security▪ Most security appliances (B/SC) do not scale down to enterprise ▪ Very few support encryption (TLS and SRTP)

Directory▪ Many carriers’ own intra-community VoIP traffic traverses PSTN!!!▪ Should leverage existing number management systems▪ Not as simple as storing telephone number and associated URL

Mediation ▪ End to end IP calls often do not trigger PSTN databases▪ Poor interoperability across enterprise

Connectivity▪ Poor quality unacceptable for cheap dial tone ▪ ISP-CLEC peering in co-location centers

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Intra-Community Centralized Policy Server

Central repository of subscription and topology information▪ Regulates operating costs (scales operations, enables forced on-net)

Combination of ENUM and IMS specifications ▪ Number block/pool route selection (destination, origination, time, cost)▪ Subscription discovery, one or more service URIs per user ▪ Callout (service trigger) to PSTN/PLMN databases

Trunk Gateway

Call Agent/SoftswitchPSTN/PLMN

Centralized Routing Directory

PSTN Breakout Gateway/Border Element Selection Intra-Community Service and Location Discovery Trigger SIP/ENUM reachable PSTN Databases

Application Server

CNAM LNP

PSTN Databases

HLR

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Tier 2 discovery (SPid or NS record)

Inter-Community TN2URL Mapping

Tier 1 (common directory) resolves number ownership▪ Industry data sources (number pools and portability) ▪ Service provider supplied “Authoritative List” (overrides industry data)▪ TN to SPid or TN to NS Record (Tier 2 ENUM Server)

Border Element

Call Agent

Border Element Call

Agent

Tier 2 ENUM Server

Tier 2 ENUM Server

Tier 1 ENUM Server

1

2

4

IP Peering Exchanges

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5

Service Provider A Service Provider B

3Service and location discovery (NAPTR record)

LERG and NPAC TN to SPid industry data

“Authoritative List” manually entry or bulk upload via portal

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Data Partitioning

Peering managed by way of data types▪ Classification specifies level of sharing

Data classifications ▪ Private – visible only to enterprise/service provider (intra-domain)▪ Restricted – visible to “closed user group” of peers (restricted inter-domain)▪ Federated – visible to all publishing to directory (unrestricted inter-domain)

DA

TA

PA

RT

ITIO

N

Secure Self-Management Portal- Upload service provider’s dial plan or

enterprise’s corporate directory- Optionally establish closed user group of

peers or opt all-in peering with all

Peering entities may query one another’s topology data but may not view one another’s data via portal

Peers

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Enterprise Peering

Introduction of inter-working equipment on customer premises▪ Security and interoperability across major equipment vendors

Routing Directory

Self-Management Portal- Publication of corporate directory- Management of peering enterprises

Security- Application level NAT (topology hiding)- Signaling encryption (TLS)

Interoperability - Legacy PBXs- H.323 inter-working w/ SIP- Vendor variants

Signaling encryption (TLS) Authentication (HTTP Digest) Private dial planTelephone # to URL address resolutionFault tolerant routing and load balancing

Enterprise A (Site 2)

Enterprise B

Inter-Enterprise

Intr

a-E

nte

rpri

se

Enterprise A (Site 1)

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Agenda

Technical Issues of VoIP Peering

(VP-02) Thursday 01/26/06 12:30-1:15PM

VoIP Peering Business Case Studies

(VP-03) Thursday 01/26/06 1:30-3:15PM

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State of VoIP Peering Market

PSTN replacement slow not explosive growth▪ Forced on-net weak VoIP community still small

International termination loosing steam▪ Toll bypass marginalized thru price erosion

Local and fixed-mobile convergence gaining momentum▪ Cheap dial-tone bundled local and long distance▪ International demand for country code “1” telephone numbers▪ Domestic and international roaming bypass (dual mode roam to Wi-Fi)

The players▪ CLECs altering business model to include wholesale VoIP▪ ISPs marketing telephony services to subscriber base▪ Portals with advertisement revenue model add voice to grow user base

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Positioning

In-network value proposition enhances CLEC or IPX service▪ PSTN bound calls forced on-net between customers ▪ Value increases as size of community grows (# of telephone numbers)

Addition of voice to enterprise extranets▪ Sharing of corporate dial plans▪ Exchange rich media (voice, video, presence & IM) within supply chain

Disaster recovery services▪ Automatic or manual switch to backup site▪ Target market include financial institutions

Bundle w/ other managed services ▪ Integration w/ IN Databases (Calling Name…)▪ Fixed-mobile convergence (SMS, MMS,

cellular roaming clearing/settlement…)

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VoIP Peering Ecosystem

Partner ▪ Internet Peering Exchange (QoS-enabled Interconnect)

VeriSign ▪ Registry Services (Topology Publication)▪ Security Services (Topology Hiding)▪ Interoperability (Protocol and Vendor Variants)

Customers ▪ Service Provider (ISPs…)▪ Enterprise verticals (financial institutions…)

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In Network Value Proposition

Mobile network operators successful “In-Network Calling” rate plans▪ Inexpensive “sticky” method of attracting and keeping customers

Private peering solution▪ Allows CLEC or IPX to establish club of peering customers ▪ Force off-net calls on-net and save customer added expense of PSTN

Network Routing Directory

Broadband Telephony

User Communities

Web Portal(self-management - manual entry or bulk upload)

Member opts into the managed peering “club”, publishing their address space to all

members or a sub-set of members

Private IP Peering Exchange

Voice (RTP) Traffic

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IP Enabling Trader Voice Networks

Trader systems interconnect w/ resilient Session Initiation Protocol (SIP)▪ Ring down/hotline dial plan▪ Sites connected over redundant IP backbone

Near real-time MAC and improved reliability (disaster recovery)▪ Calls switched seamlessly between TDM (Turrets) and IP (transport)▪ Simultaneous or sequential ring down

Turrets

Proxy Server[1] (SIP Forking)

Simultaneous Ring (Primary/Backup)

Voice Gateway

Redirect Server[1] (Network Routing Directory)

Telephone Number to URI Mapping

Managed IP Network[1]

Primary Site

Disaster Recovery Site

Primary Gateway

Backup Gateway

Ingress Egress

[1] All core network systems deployed to geographically redundant dispersed sites.

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Fixed Mobile Convergence

Launched in early 2004 and branded Wireless IP Connect▪ Building market experience thru live trials▪ Mobile operators, internet service providers and universities

Serving-MSC model (Roaming to Wi-Fi)▪ Microsoft Windows Mobile Pocket PC (HP iPAQ and i-mate PDA2K)▪ SIP based soft-phone client manages handset radio interfaces ▪ Protocol inter-working function performs SIP to MAP interoperability

(TLDN to IP mapping)

(TLDN call setup)

(TLDN discovery)

(Presence update)

(Inbound Call)

SS7 Network

Gateway-MSC

HLR

PBX/Media Gateway

IS-41/SIP Peering (Interoperability) Enterprise

Mobile Network

PSTN

1

3

4

2

5

6

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DID On-Demand (Peering CLECs and ISPs)

Acquiring local numbers is difficult▪ FCC has historically required CLEC certification to obtain numbers▪ Numbers assigned in thousands blocks by rate center – ITSPs often do

not have a sufficient customer base in any region to use a block▪ Complex porting issues and government reporting requirements

Acquiring local numbers is expensive ▪ ISDN PRIs to connect to the media gateway▪ Unnecessary long-distance switched access costs

VeriSign’s DID-On-Demand service gives ITSPs a single source for

ordering and provisioning telephone numbers (DIDs) ▪ Service allows the allocation of phone numbers on an as-need-basis

CLEC ISP/ITSP

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