Intro to TDMoIP2.ppt Slide 1
TDMoIPTDMoIP
Eitan Schwartz
Vice President and General Manager, TDMoIP Technologies
RAD Data Communications Inc.
Email: [email protected] Ph: 201-529-1100 x 241
Web: http://www.rad.com Fax: 201-529-5777
CONCEPT & TRENDS
Intro to TDMoIP2.ppt Slide 2
ContentsContents
Trends The opportunity and problem Solution – Circuit Extension over IP TDMoIP architecture and RAD’s Implementation Comparing TDMoIP with ATM and VoIP Benefits of TDMoIP Service Provider Solutions Enterprise Solutions Summary
Intro to TDMoIP2.ppt Slide 3
Packet over TDMPacket over TDM Today, Voice and data traffic traverse the TDM, circuit switched
network
IP, FR, & ATM carried across PSTN, T1, T3 and SONET Highways
Intro to TDMoIP2.ppt Slide 4
Trend: TDM Voice & Data over PacketTrend: TDM Voice & Data over Packet
Tomorrow, TDM based voice and data will be carried across packet networks
Cable
DWDM
Wireless
GigabitEthernet
TDM
Because IP services are Fast (GbE rates) Cheap (low $/Mbps) Reliable (QoS) Scalable (up to 10Gbps) Ubiquitous
Intro to TDMoIP2.ppt Slide 5
TrendsTrends
Carriers installing more IP and Gigabit Ethernet
Packet-based networks are scalable and cost less than traditional T1 and T3 leased lines
Powerful Ethernet switches are dominating the enterprise because they are cheap and simple
Enterprises consider migrating their legacy voice networks over IP, but are concerned that voice quality, service reliability and existing features may be compromised
Service providers are looking to provide additional services over cost-effective IP
Simple, low cost solutions continue to beat complex, expensive alternatives
Intro to TDMoIP2.ppt Slide 6
The Opportunity and ProblemThe Opportunity and Problem
Opportunity
– Convergence of voice and data reduces redundant administration, cabling and hardware costs
Problem
– Connecting PBXs and TDM equipment over IP is problematic due to signaling, timing and specialized features
– Most solutions are complex and expensive; they usually compromise quality and functionality
Feature transparency is often compromised
Intro to TDMoIP2.ppt Slide 7
Solution: TDMoIP GatewaysSolution: TDMoIP GatewaysCircuit Extension over IPCircuit Extension over IP
Transparent extension of T1/E1 circuits over IP
– The synchronous bit stream is chopped into packets
– IP headers are added
– Packets are forwarded to destination over the IP network
– At destination, the original bit stream is reconstructed by removing IP headers, concatenating the packets, and regenerating the clock
This technology is called TDMoIP
Intro to TDMoIP2.ppt Slide 8
Reversing the ApproachReversing the Approach
Classic approach:
IP over...
IP
ATM/FR
TDM/SONET
Fiber
IP
Reverse approach:
… over IP
Ethernet
Fiber
TDM
So now TDM simply becomes the legacy migration application running over an IP infrastructure
Intro to TDMoIP2.ppt Slide 9
TDMoIP ArchitectureTDMoIP ArchitectureCircuit Extension over IPCircuit Extension over IP
User InterfaceStandards based (e.g.T1, E1)Unframed or framed/channelizedTransparent to protocol- Any data (BSC, FR,..)- Any voice (PCM, ADPCM,..)- Any signaling (PRI, DPNSS, SS7,..)
Network InterfaceLow cost (e.g. 10/100BaseT)Configurable QoS options:- VLAN for layer 2 priority (802.1p&q)- ToS for IP level priority - known UDP Ports for layer 4 priorityCompensate packet delay variation
External / adaptive clock regenerationLow processing delayScalability, redundancy, management & diagnostics
TDMoIPTraditional
CircuitsPacket
Networks
Intro to TDMoIP2.ppt Slide 10
IPmux FamilyIPmux Family
1, 4 or 16 T1/E1 ports over Ethernet uplink TDM payload configurable from 48 to 384 octets Overhead as low as 7% Low processing delay (under 1ms) QoS support for 802.1p&q, ToS & IANA UDP ports SNMP management with graphic interface Performance monitoring for T1/E1 and LAN ports
Back Panel
P S2P S1
~ 100 -24 0VA C 3A T 125 V~ 100 -24 0VA C 3A T 125 V
AL ARM S
P OW E RP OW E R
OO
II
IPmux-1
IPmux-4
IPmux-16
Intro to TDMoIP2.ppt Slide 11
TDMoIP Architecture ChallengeTDMoIP Architecture Challenge
Redundant power supply and uplinkHigh availability
Scalable through Ethernet switchEasily scalable
Clock recovered through networkSupport for cross network clock regeneration
Jitter buffer compensates for up to 32ms delay variation (300ms on IPmux-1)
Support packet delay variation
Low processing delay (under 1ms).Low delay
Supports 802.1p&q (layer2), IP ToS (layer3) & IANA UDP ports (layer 4)
Complete support for QoS facilities
Physical layer extension over IPTransparent to Protocol
10/100BaseT EthernetHigh speed, low cost network interface
Standard Framed & Unframed E1/T1 supported
Standard Interface supports full and Fractional services
Intro to TDMoIP2.ppt Slide 12
Price Comparison: IP vs. TDMPrice Comparison: IP vs. TDM
$/Mbps
time
T1, T3 circuit costs
T1/T3 circuit costsusing IPmux
IP costs
Conclusion: Price of IP bandwidth decreasing at a much faster rate than that of T1 or T3
Intro to TDMoIP2.ppt Slide 13
TDMoIP vs. ATMTDMoIP vs. ATM TDMoIP provides similar benefits to ATM:
– low end-to-end delay– maintaining integrity of framed or unframed T1/E1
In contrast to ATM, TDMoIP:– is simpler and less expensive– has configurable packet size for optimizing
overhead/delay trade off– is carried over ubiquitous IP and Ethernet
networks
Intro to TDMoIP2.ppt Slide 14
TDMoIP vs. VoIPTDMoIP vs. VoIP
TDMoIP and VoIP both offer convergence over IP
In contrast to VoIP, TDMoIP:
– is transparent to protocols and signaling
– is simpler and less expensive
– supports installed PBXs with no loss of functionality
– supports all modem and fax rates
– is suitable for sync/async data protocols
– maintains integrity of framed and unframed T1/E1 circuits
Intro to TDMoIP2.ppt Slide 15
TDMoIP and VoIPTDMoIP and VoIP
TDMoIP (Telephony over IP) Simple & evolutionary
– uses standard, mature, and well known protocols: T1, IP
– low cost of ownership Maintain installed PBXs
– significant cost savings– little disruption to business
No loss of PBX functionality Low delay
– transparent to signaling and protocols
Configurable packet size– low delay– configurable overhead
Data & voice circuit extension DS0 level bundling & X-connect
VoIP (IP Telephony) Complex & revolutionary
– new evolving protocols such as H.323, MGCP, and SIP
– complexity requires retraining IT Fork lift upgrade (reinvent the
telephone switch)– compatibility issues
Limited today, new features possible Long call setup times
– translation between signaling formats (SS7, ISDN,..)
Packets depend on codec samples– delays as sample is recorded– overhead on each voice session
Primarily voice Voice switching per call
Have same goals - convergence, ...but a few critical differences:
Intro to TDMoIP2.ppt Slide 16
Alternatives for Migrating Legacy Alternatives for Migrating Legacy PBX’s to IP NetworksPBX’s to IP Networks
“If you’re happy with your telephony features, but you wish to migrate to IP networking without fork lift upgrades and lost functionality”
“If current telephony features are insufficient and you’re ready to take on the challenges of new and evolving protocols”
Simple,Low cost of ownership
Complex,Expensive
TDMoIP VoIPAn inexpensive migration strategy to IP:
The alternative for customers who have fully depreciated their telephony equipment:
Intro to TDMoIP2.ppt Slide 17
Benefits for End-Users and IntegratorsBenefits for End-Users and Integrators
End User
– Simple, low cost voice/data convergence solution over IP and
Ethernet
– Protect investments in PBX and TDM equipment with no fork
lift upgrades and no loss of functionality
Integrators
– Tie the circuit switched world into the IP economy
– Help build reliable enterprise and institutional networks
– Address enterprise business concerns by providing
evolutionary rather than revolutionary solutions
Intro to TDMoIP2.ppt Slide 18
Benefits for Vendors: Benefits for Vendors: Complimentary SolutionsComplimentary Solutions
PBX vendors
– PBXs with proprietary signaling and unique feature sets
are now fully supported over IP
Ethernet switch and router vendors
– Now are empowered with traditional TDM voice, video &
data capabilities
Wireless radio and laser equipment vendors
– Systems designed for LAN extension can now deliver
leased line services to remote buildings
Intro to TDMoIP2.ppt Slide 19
Benefits for Competitive CarriersBenefits for Competitive Carriers
Compete with ILEC by providing voice and leased
line services over Ethernet or IP infrastructure
Expand market share quickly into tier 4 towns with
scalable solution that reduces risk
Efficiently groom T1/E1 circuits onto optical and
wireless networks (DS0 granularity)
Provide access to ATM, Frame Relay, ISDN and
X.25 over IP networks
Intro to TDMoIP2.ppt Slide 20
Circuit Extension over IP -Circuit Extension over IP -Generic Carrier ApplicationGeneric Carrier Application
m x T1/E1
Service POP
Regional POP
n x T1/E1 Circuits extended to customers
n x T1/E1 Circuits extended to customers
Multi-tenant Unit (MTU)
Basic TransportEnhancedServices
IP
Customers
IPmux
IPmux
IPmux
•Gigabit Ethernet Switch•Wireless Ethernet Modem•IP Router•DSLAM
TDM Synchronous link (e.g T1)
Packet (e.g 10/100BaseT)
KEY
3rd party serviceofferings
PSTNCentrexClearinghouseVoIPATMFrame Relayetc.
Intro to TDMoIP2.ppt Slide 21
Service Provider SolutionsService Provider Solutions
Circuit Extension over IP - Generic carrier
application
– Wireless and optical local loop
– Voice and data services to multi-tenant buildings
– Expand market Share using ILEC for local loop
– Connecting cellular networks over IP
– Grooming DS0 channels onto T1/E1 and Ethernet
– Bundled services: PSTN, VoIP and Internet
Intro to TDMoIP2.ppt Slide 22
Circuit Extension over IP -Circuit Extension over IP -Generic Enterprise ApplicationGeneric Enterprise Application
IP
•Gigabit Ethernet Switch•10/100BaseT Ethernet Switch•Wireless Ethernet Modem•IP Router
TDMMux
LANLocation A
Location B
PBX
PBX
LAN
Video
IPmuxD XC -3 0
IPmux
LAN
Location C
PBXIPmux
D XC -3 0
TDM Mux
TDM Synchronous link (e.g T1)
Packet (e.g 10/100BaseT)
KEY
T1/E1s
T1/E1s
T1/E1s
Intro to TDMoIP2.ppt Slide 23
Enterprise ApplicationsEnterprise Applications Circuit Extension over IP - Generic application
– Centralized Voice Services– Voice and Video across Campus LAN– Metro Area networks: Adding Voice to Optical Packet Networks– Building a Wireless Campus: Voice and Data integration over Ethernet– Adding Voice to Wireless LAN Networks– Drop-and-Insert over Fiber (Max 500 T1)– Adding Voice to LAN over ATM Networks– PSTN Bypass– Secure Government / Military Networking over IP
Legacy TDM Multiplexing over IP - Generic Application– Extending Analog or ISDN Telephones over Ethernet or IP networks– Channelized T3/E3 & High-Speed Serial Data over Ethernet or IP– SCADA: System Control and Data Acquisition
Intro to TDMoIP2.ppt Slide 24
Simple, inexpensive migration path to IP without compromising
current telephony features
Transparent to all signaling and protocols
Protects investment in PBX and TDM equipment with no fork lift
upgrades Circuit Extension over IP provides the benefits of IP
networks without the dangers of a new technology
Supports legacy telephony services over IP with no loss of
functionality
Empowers IP networks with leased line capabilities for Voice, ATM,
Frame Relay, SNA, etc.
SummarySummary
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