january 23-26, 2007 ft. lauderdale, florida sip trunking 101 presenters: pete sandstrom, cto bandtel...
TRANSCRIPT
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Trunking 101Presenters:
Pete Sandstrom, CTO BandTelJanne Magnusson, Director Operations Ingate
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Trunking 101 Session Overview
1. Business Opportunity
2. What is Signaling
3. The SIP & SIP Trunking, Value Prop
4. The Role of the ITSP
January 23-26, 2007• Ft. Lauderdale, Florida
1. Business Opportunity is Primed
• IP-PBX Market on track to exceed $10 billion
(Synergy Research)
• By 2008, 55% of all Enterprise
Communications Systems will be IP-enabled
(Frost and Sullivan) which means the
majority of PBXs will be
SIP-compatible/ready
• VoIP Service Providers gaining enormous
traction in marketplace
January 23-26, 2007• Ft. Lauderdale, Florida
2. What is Signaling?
Since SIP/SIP Trunking is a standard for signaling, let’s
understand what signaling is and the many forms of Voice
Over Internet Protocol (VoIP). The 4 major standards-
based signaling systems are:
1) H.248 Media Gateway and Control (MEGACO)–
an International Telecommunications Union (ITU)
(www.itu.it) standard. H.248 originated from the Public
Switched Telephone Network (PSTN) using Signaling
System 7 (SS7) with dumb telephones.
January 23-26, 2007• Ft. Lauderdale, Florida
2. What is Signaling?
2) H.323 is an ITU standard and the logical
progression from circuit-switched to packet-
switched telephone call processing including
video services. H.323 networks consist of Call
Processing servers, Media Gateways (MG) and
GateKeepers.
January 23-26, 2007• Ft. Lauderdale, Florida
2. What is Signaling?
3) Media Gateway Controller Protocol (MGCP) is a device
control protocol developed by Internet Engineering Task
Force (IETF) designed to control devices such as Media
Gateways (MG) and Integrated Access Devices (IAD).
The difference between MGCP and other multimedia control
protocol systems is that MGCP allows the endpoints in the
network to control the communication session.
January 23-26, 2007• Ft. Lauderdale, Florida
2. What is Signaling?
4) Session Initiation Protocol (SIP) - an Internet
Engineering Task Force (IETF) signaling protocol
for internet conferencing, telephony, presence,
events notification (emergency calling) and instant
messaging.
For complete details on SIP, go to www.ietf.org
RFC-3261 or http://www.ietf.org/rfc/rfc3261.txt
January 23-26, 2007• Ft. Lauderdale, Florida
A. Bell – The Beginning of Signaling
• Dumb phones & Dumb network• Signaling via Tip & Ring – Loop Start – Ground Start
January 23-26, 2007• Ft. Lauderdale, Florida
• Dumb phones & Smart network• Signaling via inband (T-1) or out-of-band (ISDN)
Ma Bell – Signaling System 7 (SS7)Designed in the 1980s, deployed in the 1990s
January 23-26, 2007• Ft. Lauderdale, Florida
• Smart phones & Smart applications SIP network• Signaling is via SIP messages sent via UDP/IP
No Bell – Internet Adds SIP
January 23-26, 2007• Ft. Lauderdale, Florida
3. What is Session Initiation Protocol (SIP)?
• SIP is a telephony signaling protocol that is used to establish a "communications session or connection" such as a telephone call, conference call or other type of communications on an Internet Protocol (IP) network.
• SIP is a request-response protocol that operates like a "communications browser" protocol such as Hypertext Transfer Protocol (HTTP).
• SIP is the communications equivalent to such internet protocols such as HTTP and Simple Mail Transfer Protocol (SMTP).
January 23-26, 2007• Ft. Lauderdale, Florida
SIP “Invites” Callers Together
January 23-26, 2007• Ft. Lauderdale, Florida
SIP is a Fully-Featured Protocol
January 23-26, 2007• Ft. Lauderdale, Florida
What is SIP Trunking?
• SIP Trunk is a network interface device that
recognizes SIP signals (signaling) and can
process these signals to other SIP devices.
• In other words, a SIP Trunk is an expandable or
“virtual” digital data transmission link with SIP
protocol signaling interfaces that recognizes SIP
signaling and SIP media using Real-Time Protocol
(RTP) for media transmission (voice, rich media).
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Trunking Applications– Local and inbound calling
– G.711 and G.729a Codecs
– Re-Invite support across multiple locations
– Inbound load balancing options across multiple locations
– Disaster recovery options
– Directory Assistance
– Enhanced 911 services access
– 411
– Directory Listing
– Operator assisted dialing
– Local Number Porting Management
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Trunking Value Proposition SIP has become “the” defacto standard for IP communications:
• SIP offers a set of formal rules that provides the basic signals used to initiate, manage, and terminate IP communications sessions.
• SIP goes beyond voice to support true multimedia communications/convergence – i.e., voice, data, video
• SIP embraces and supports enhanced communications capabilities, such as presence and mobility applications
• Reduces toll charges from SIP origination/termination services
to the PSTN for external long-distance and local access calls
• Optimizes Utilization of Enterprise IP Pipes
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Supports Legacy Infrastructures
• SIP supports for both Legacy and New IP-based Enterprise Communications Systems
• SIP offers a migration path while retaining investment in legacy equipment while bringing the unique benefits of VoIP
• SIP offers:– Reduced Transport Costs– Enhanced Services: DID numbers, call transfer
between headquarters/branch offices, real-time access to billing and usage
January 23-26, 2007• Ft. Lauderdale, Florida
IP-PBXs Migrate PBXs – ITSPs Emerge
ITSP
PTSN
IP
PBX
SIP Services
GW
SAFW
SIP-Aware FireWall (SAFW)
January 23-26, 2007• Ft. Lauderdale, Florida
ITSP Do More
• Public vs. Private IP Pipe• ITSP should be able to work in both
domains
- Public Internet
- Private – Virtual Private Network (VPN)
- Both can be completely secure, but VPN costs more
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Over Public Internet or VPN
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Over Public Internet or VPN
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Over Public Internet or VPN
January 23-26, 2007• Ft. Lauderdale, Florida
Security and Reliability
• Need to see that the CPE LAN is correctly designed for VoIP
• CPE protection- a SIP Aware Firewall (SAFW) is needed allowing Layer 5 (L5) security (i.e. no L2 pinholes)
• ITSP Message Digest 5 (MD5-digital encryption coding) is minimal requirement IP authentication is needed
• ITSP should split media and signaling to different redundant locations
• ITSP must have secure POPs that can fend off all outside attacks, including source-route bridging spoofing detection.
January 23-26, 2007• Ft. Lauderdale, Florida
4. The Role of the ITSP
• SIP User Agent is Plug-and-Play with ITSP
(Interoperability Program)
• ITSP Architecture Black Box to SIP User Agent
• Core ITSP infrastructure is redundant and resilient
• Rich diversity of PSTN carriers and routes to
global destinations
January 23-26, 2007• Ft. Lauderdale, Florida
What Does an ITSP Look Like
January 23-26, 2007• Ft. Lauderdale, Florida
ITSPs “Peer” For Customer Performance
January 23-26, 2007• Ft. Lauderdale, Florida
ITSP “Peering” For Total SIP Solution
ISP
IP
PBX
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Trunking 101 Summary
• SIP Trunking brings “plug-and-play” interoperability for existing
PBX systems and hosted VoIP systems
• SIP Trunking simplifies deployment and support chores for
distributors and channel partners
• SIP Trunking brings offers new features/services in the form of
“open” applications development
• SIP Trunking provides geographical unification of the enterprise
• SIP Trunking brings enormous cost savings to customers
January 23-26, 2007• Ft. Lauderdale, Florida
January 23-26, 2007• Ft. Lauderdale, Florida
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Trunks
Internet
IP-PBX
Firewall
Service Provider
• Important to have a reliable and well dimensioned network
– Consider delay and QoS
• The firewall is the demarcation point for the enterprise network
• Secure privacy and prevent eavesdropping
Communication on the LANSIP Trunks
Internet
IP-PBX
Firewall
Service Provider
January 23-26, 2007• Ft. Lauderdale, Florida
SIP Trunks
Internet
IP-PBX
Firewall
Service Provider
• Important to have a reliable and high quality Internet connection
– Consider delay to ITSP– Of your connection QoS
(voice should have priority)
• Voice travels over public Internet (as e-mail)
• Possible to secure privacy and prevent eavesdropping
Communication outside the LANSIP Trunks
Internet
IP-PBX
Firewall
Service Provider
January 23-26, 2007• Ft. Lauderdale, Florida
January 23-26, 2007• Ft. Lauderdale, Florida
Questions?
January 23-26, 2007• Ft. Lauderdale, Florida
About Ingate
• Formed 2001– Firewall technology from Cendio Systems
• Appliance firewalls since 1994– Capital and SIP technology from Intertex Data AB
• Began SIP development in 1998
• Released the worlds first SIP capable Firewall in 2001
• Located in Stockholm and Linköping, Sweden with a subsidiary, Ingate Systems Inc., based in Hollis, NH.
• Confirmed IP-PBX interoperability:3Com, Asterisk, Avaya, Broadsoft, Cisco Call Manager, Ericsson MX-One, Mitel, Pingtel, SER, Shoretel, Sphere, Swyx, Zultys
• Confirmed carrier interoperability:Bandtel, Broadband.com, Cbeyond, Global Crossing, IP-Only, O1, RNKTel, Tele2, VoEx
January 23-26, 2007• Ft. Lauderdale, Florida
About BandTel
• Headquartered in Newport Beach, California, BandTel is a leading worldwide provider of SIP Trunking services.
• BandTel is dedicated to ensuring its customers and partners alike have access to the most reliable, end-to-end VoIP service available on the market today.
• BandTel’s N-Plus™ network architecture is designed to solve the throughput and redundancy problems on high-capacity SIP-based networks and eliminate any single point of failure.
• BandTel continues to develop strong partnerships with leading carriers and telecommunications companies, including Global Crossing, XO Communications, Level 3, Qwest Communications, Verizon Business, and Primus.