tdmoip concept and trends

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


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


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


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


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


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


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


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


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


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


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


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


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


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


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:


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:


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


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


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


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.


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


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


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


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

tdmoip concept and trends

Documents

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ip network

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ip low cost of ownership

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