Voip Presentation

Voice Over Internet Protocol

Imran Haider Naqvi Manager Training Div.

CORVIT SYSTEMS Corvit-Marsons

What is VoIP? 

A Process of transmitting Voice traffic over data Network.

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ITU-T’s H.323 is overall backbone 

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originally a specification for videoconferencing over LAN, now widely adopted as general Internet Telephony standard uses RTP as transport Corvit-Marsons

Traditional Data Networks

IP IP

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Traditional Voice Networks

PSTN

Traditionally Voice Services were only provided by PSTN providers. Corvit-Marsons

Emerging Networks

IP

One service provider is providing the services of both VOICE and DATA Corvit-Marsons

Benefits & Applications 

Toll bypass 

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Most common application

PBX extension Saves costs by reducing maintenance costs and overhead Between Offices 

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Between Offices Office A

Office B

1.1.1.1

S0/0

IP FXS

S0/0

1.1.1.2

FXS

FXS Card is used to connect our router directly to analog telephones. Corvit-Marsons

Toll By Pass

IP

FXO

FXO PSTN

PSTN KHI

London

FXO Card is used to connect our router directly to PSTN Corvit-Marsons

Cisco VoIP Components V

Voice-enabled Client (1-2 lines) (1750) Voice-enabled Client (1-2 lines) (2610)

Analog Voice Gateway (2-12 lines) (3640)

V

Digital Voice Gateway (24-120 lines) (5300) Corvit-Marsons

Voice over IP Protocols Stack Presentation Session

G.729(A)/G.723(.1)/G.711 H.323/H.323Gateway/SIP/SDP

Transport

RTP/UDP/RSVP

Network

IP/WFQ/IP-prec

Link

MLPPP/FR/ATM AAL1 –––

Physical

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ATA- The Voice Gateway 

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Analog Telephone Adaptor (ATA) is a device for SOHO. Provides two FXS ports for Analog Telephone connectivity to IP Networks. VoIP network is independent of DATA network Low Cost solution Corvit-Marsons

Service Provider Solutions Access Path Performance/ Density

V V V V

V

Cisco 3640

Cisco 3620

Cisco 2600 Corvit-Marsons

Cisco AS5300

Cisco AS5800

Configuration (Between Two Offices) Corvit Systems

Corvit Dubai

101

201 1.1.1.1

S0/0

IP

102 S0/0

1.1.1.2

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202

Lahore Router   

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LHR (config)# dial-peer voice 1 pots LHR (config-dial-peer)# destination-pattern 101 LHR (config-dial-peer)# port 1/0/0 LHR (config)# dial-peer voice 100 VoIP LHR (config-dial-peer)# destination-pattern 2.. LHR (config-dial-peer)# session target ipv4:1.1.1.2 Corvit-Marsons

Dubai Router Any body would like to guess!!!   

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DXB (config)# dial-peer voice 1 pots DXB (config-dial-peer)# destination-pattern 201 DXB (config-dial-peer)# port 1/0/0 DXB(config)#dial-peer voice 100 voip DXB (config-dial-peer)#destination-pattern 1.. DXB (config-dial-peer)# session target ipv4:1.1.1.1

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