Transcript SP-7 - TMCnet

Next Generation Switching Solutions Explo
Brad Miller
NexTone, Vice President of Business Development
[email protected]
Who is NexTone?
NexTone provides Session Controller technology
that enables carriers to
control, route and manage
real time IP traffic (Voice and Video)
in a way that is
secure, seamless and enabled for QoS
Softswitch Architecture
Softswitch
SIP Softswitch
Network
MG
MG
PSTN
MG
TDM
PSTN
Orig/Term
TDM
TDM
H.323 Netw
Enterprise
• Architecture results in VoIP islands
• TDM is used to normalize traffic signaling and media: ea
implement, but cumbersome to operate and expensive
• Adequate voice centric solution
• How will Carriers implement future real time services?
Economics for NextGen Solutions
• Multi-switch TDM networks:
– Most calls typically traverse 4-6 TDM ports per call
• VoIP Tandem solutions:
– Offers a reduction to 2 ports
– 1 Ingress port and 1 egress port, plus call control
• VoIP Interconnects:
– Carrier may achieve less than 2 ports per call
– Ingress or Egress Media Gateway port, but not both where the
interconnects VoIP with a 3rd party customer or supplier
– Some calls stay all IP
– Maximize CAPEX reductions
Economic Comparison
Scenario
TDM
TDM
Cost/TDM
Ports/Call
Port
4
$150
Cost/Call
Saving
$600
Softswitch
2
$190
$380
37%
SoftswitchSC
SC-SC
1
$190
$240
60%
$100
83%
0
VoIP Obstacles to Overcome
• Using VoIP interconnects creates some challenges
– TDM is an implicit firewall and normalizes VoIP traffic.
• Security
– How do calls traverse existing firewalls and NATs?
• Interoperability
– How do calls go off-net?
– How can SIP applications be leveraged?
– What are the pain points?
VoIP Security
• Carriers concerns with VoIP peering
– Desire to hide network topology from partners
– Need to secure their voice infrastructure from traditional intern
security threats
• Firewall implementations are a barrier to real-time servic
for the enterprise
–
–
–
–
Security policies prevent promiscuous and ad hoc connectivity
Lack protocol awareness for H.323 and SIP
Firewall traversal needed to reach the corporate IP PBX
IP Centrex requires Multiple NAT traversals to reach SOHO us
VoIP Incompatibilities
• Applications are SIP based while network infrastructure
IP PBXs continue to be H.323 dominated
– 90% of VoIP Networks are H.323 while 90% of VoIP Apps are
– Prevents enterprises from leveraging SIP apps from Carriers
• Standards are subject to vendor interpretation
– Problem areas: message formats, message order, timing
• Other problem areas arise because of endpoint limitation
– Codec mismatch
– Mismatch of DTMF transport methods
– T.38 fax
Session Controllers to the Rescue
• AKA Border Controller or Session Border Controller
• Rapidly emerging networking technology that provides la
5 routing and control to manage real-time traffic flows in
networks
• Technology addresses issues of:
–
–
–
–
–
Session routing
Network security
Call admission control
Signaling interoperability
Service quality
Session Controller Architecture
ASP
ESC
SIP Softswitch
Network
Core Session
Controller
Softswitch
PSTN
PSTN
Orig/Term
Edge
Session
Controller
ESC
ESC
H.323 Netw
Broadband
Enterprise
Peering
Broadband
NAT Traversal
Carri
Peerin
NextGen Evolution
• Session Controllers and softswitch technology are
synergistic and must co-exist to bridge between the PST
and emerging IP based networks
• The solution blueprint for all real-time services:
– Core Session Controllers for routing of sessions
– Softswitch and Edge Session Controller technologies at the e
for traffic adaptation
• VoIP carriers have rapidly adopted Session Controllers w
TDM carriers are slowly migrating to VoIP technologies
driven by cost containment strategies (e.g. limit or delay
CAPEX for large TDM switches)
Session Controllers
• Core Session Controller (CSC):
–
–
–
–
Deployed in the network core; used for signaling only
Programmable route engine
Centralized CDR collection
Call Admission Control on a network basis
• Edge Session Controller (ESC):
– Deployed at the network edge to manage interconnects (both
media and signaling)
– NAT and Media Routing for network security
– Signaling Interoperability and interworking (abstraction layer)
– Call Admission Control on a local basis
– Media processing for specialized applications such as transco
Session Controller Applications
• Carrier-Carrier Peering
– International Voice Wholesale
• Carrier-Enterprise Peering
– IP PBX Trunking bundled with long distance
• Broadband NAT Traversal
– Consumer based applications
– IP Centrex or Hosted PBX
Carrier Network Evolution
Carrier
Applications
4 Value Add Applications
2
International Gat
ASP
C
Class 5
ESC
CSC
IP
IP
1 Migration to Softswitch
ESC
SS/MG
3 Enterprise Trunking
Class 5
Class 4
Enterprise
TDM
Enterprise
VoIP
VoIP Peering Drivers
• Lowering the Cost of Interconnects
– Lower CAPEX and OPEX cost per interconnect
– Increased port capacity on existing gateways and switch ports
– VoIP-to-VoIP requires ZERO switch or MG ports
• Expand Service Reach with H.323 and SIP
– H.323 continues to be used for trunking applications
– SIP Interconnects are here and growing
– 3rd party SIP applications and devices (Calling Card, IP
PBX/Centrex, 800, etc.)
• Extend network seamlessly towards other services
– Sell retail (enterprise) customers voice VPNs, Int’l LD, etc.
– Using the same platform
VoIP Proof Point #1: ITXC
• ITXC Carries Record Voice Call Volumes for Holidays
“In past years, our carrier customers used ITXC to complete their subsc
calls because our VoIP technology allowed us to provide them high qua
low prices. Usually, the only VoIP involved was within our network. Now
carriers also choose ITXC for interconnection because they themselves
deploying VoIP equipment in their own networks or even at their subscri
premises. Our technology allows these carriers to connect their Vo
networks to ours at much less cost than a legacy PSTN interconne
with much greater flexibility.” said Tom Evslin, Chairman and CEO,
Corporation.
In the fourth quarter of 2003, over one third of ITXC's traffic was
originated or terminated through a direct VoIP interconnect betwee
ITXC.net® and the network of another carrier. ITXC has VoIP interco
with over 140 carriers or service providers in 60 countries and supports
traffic exchange with a wide variety of network equipment vendor platfor
based on either Session Initiation Protocol (SIP) or H.323 call control pr
• Source: ITXC Press Release dated January 6, 2004 (www.itxc.com)
VoIP Proof Point #2
• iBasis Posts Record VoIP Call Volume During New Year's Day
“In addition to setting an overall record for traffic, we are experiencing a
volume of traffic that enters or exits the iBasis Network as IP traffic,” sai
Gneezy, president and CEO of iBasis. “Major carriers have been deploy
VoIP infrastructure to support both retail services and direct VoIP carrier
interconnects. At the same time, new service providers are delivering Vo
services directly to residential and business consumers. Both can realiz
significant cost efficiencies by establishing direct VoIP interconnections
our proven global VoIP infrastructure.”
“More than 70% of iBasis traffic either originates or terminates thro
our direct VoIP interconnects with service providers. Direct VoIP
interconnects require significantly less capital expense in the iBas
network than legacy TDM interconnects. In addition, we are enabling
customers to more fully benefit from the efficiencies of VoIP and the pub
Internet for global telecommunications.”
• Source: iBasis Press Release dated January 7, 2004 (www.ibasis.net)
NextGen Apps Carriers Deploying Enterprise Services
Hosted PBX
Media GW
SS7
SS7
TDM
Legacy
PBX
CSC serves as
a route engine
between IP
platforms and
service based CAC
CSC
Carrier
Backbone
TDM Termi
PBX
Tieline
IP
ESC
ESC performs local CAC,
signaling adaptation
(e.g. H.323/SIP), NAT and Media
Firewalling
PBX Tieline
NextGen Switching Solution Summa
• Session Controllers and softswitch technology are
synergistic and must co-exist to bridge between the PST
and emerging IP based networks
• The economics of VoIP peering is driving adoption by IP
based Carriers, such as ITXC and iBasis, while Carriers
with large investments in TDM infrastructure must first “I
enable” their networks
• Session Controller architecture provides the foundation f
value-added IP applications in addition to a more costeffective way to implement basic voice services
Questions?
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