Vo ip

VoIP Defined

• A technique for transmitting voice (analog) calls over a TCP/IP network versus a traditional carrier circuit-switched network; ideally with little or no quality difference.

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Some VoIP History

• Started in 1995

• VocalTec – First Internet Phone Software

• Ran on home PC – Called ‘Internet Phone’

• Used H.323 – SIP first drafts in early 1996

• VocalTec was the Skype of the mid 90s

• Drawbacks – Lack of broadband service, used modems, poor voice quality

• Regardless – Considered significant

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TDM vs. VoIP

• TDM– Distance limitation– Dedicated cable – Analog or proprietary– 64 K per conversation– Reliable

• VoIP– Unlimited distance– Shared with Data– Standards based– May be less than 64K– Reliable as the

network

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Protocols• H.323

– Origins in 1995 – an Intelligent Endpoint Protocol– For Video, later for voice– Binary based

• SIP– Origins in 1995 – an Intelligent Endpoint Protocol– Designed for voice, Video, and Instant Messaging– ASCII based

• MGCP– Established in 1998 – a Device Control Protocol– Designed for voice– Coupled to H.248

Tadiran’s deployment

Port Washington NY

Washington DC

Sarasota FL


Port Washington NY

Tadiran Employees


Port Washington NY

Tadiran Partners


Port Washington NY

Israel

China

Australia

Germany

Russia

India

Poland

Spain

VoIP• Station Side

Coral IPx

LAN

Coral IPxP

UG

W

FlexSet – IP

Phones

VoIP• Trunk Side Network

Coral IPx

Coral IPx

PU

GW

QSIG

Protocol

PU

GW

LAN /WAN

Universal Gateway

Gateways

• IPx Office• IPX 500• IPX800• IPX3000• IPX4000

• CUGW• PUGWipx• PUGW• PUGW• PUGW

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• Encoding standards G.711, G.729• 16, 32, 64 media channels• Up to 240 end points per card• MGCP and SIP protocol• Static setup, Dynamic setup (DHCP, DNS)• Authentication and Security• Signaling and Media Load Sharing (Secondary

CA) up to 10 call agents• IP Peer-to-Peer• Requires 2 static IP addresses

UGW Features

Let’s do the math

• UGW

• MRC-32

• IP end points– Stations– SIP Trunks– Soft phones– FXS port– FXO ports– IP-Net channels

Let’s do the math

• UGW

• MRC-64


Let’s do the math

• UGW

• MRC-16


MRC

• Provides IP / TDM conversion

• Dynamic resource system wide– Any MRC from any card

• Fits on CUGW

• Fits on PUGWipx

• Fits on PUGW

Universal Gateway (PUGW)

MRCmodule

Coral Flex- IP

Flex- IP Phone Capabilities

• Full Coral feature set

• Easy installation – Centralized DB

• Easy to maintain – Remote TFTP

• Easy setup – DHCP, DNS

• Less resources – P2P

• Infrastructure saving – Internal switch for PC

• Flexible resources – Power over LAN or local power supply

• Multiple time zones

• Survivability - Up to 10 alternate call agents

FlexSet IP Telephone

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FlexSet-IP Connections

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•Supports features on Digital FlexSet

•Fully Duplex Two way speakerphone

•Power: AC Adapter or Power over LAN 802.3af

•Static or Dynamic DHCP/DNS

•2 RJ45 ports (1 for PC and 1 for LAN)

•Upgradeable by TFTP

•Multiple Call agents

FlexSet IP Phone Features

Flex-IP SoftPhone

• Flex-IP on PC

• Use any Internet Connection: – ADSL

– Cable Modem

– WiFi (Hot Spots)

– Cellular Air card

• USB or Blue tooth Handset

• On-Line help

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Flex-IP SoftPhone

Personal Routing Rules (Presence & Outlook Based)Call Log

Dial From Directoryor any

Application(e.g. Exchange contacts)

Context Sensitive Help

Call History

Directory Services

Status Messages

T- Series IP Phones

T- Series

• So what is new?– Significantly lower price point than FlexSet-IP– SIP- or MGCP

• Wall or Desk mounted with adjustable angle of view.– T208

• Large LCD -128x64 pixels.• With or without PoE.

– T207• Small LCD – 128x32 pixels.

• Key expansion unit with 22 keys.• Full duplex speaker phone

Tadiran branded phones

• Wall or Desk mounted with adjustable angle of view.• Aggressive pricing. • Shipped as MGCP or SIP

– Can be “flashed” to either protocol

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SIP Basics

• SIP = Session Initiation Protocol.• Governed by IETF documents RFC3261 – RFC3265.• Address format: sip:[email protected]:5060.• Glossary of SIP terms:

– UA = User Agent – A SIP end point. – Registrar server – Address data base server. – Proxy server – Call handling server.– B2BUA = Back to Back User Agent – Another type of call

handling server.

• The Coral Provides all the above server functions.

What makes SIP different

• Center of intelligence is moving.

• Results:– Limited features.– Interoperability.

The benefits of SIP

• Wide acceptance.• Indifferent to media. • Accepted by data network managers.• SIP phones are the ISTs of IP telephony:

– Price.– Availability.– Functionality.

• SIP trunks connect you to the world.

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MGCP vs. SIP

Feature MGCP SIP

Hold Recall Yes No

Transfer Recall Yes No

DSS Yes Yes

BLF Yes No

Button Programming Set Web

DND PBX Phone

Conference PBX Phone

MGCP vs. SIP

SIP Terminals Commercial, off the shelfTadiran Branded

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• Time Zones– This allows for a different time to appear on

the phone display depending on its locality. Time zones will allow wake up and reminder features to follow the localized time definition.

– Local time can be set from the phone, system, or from a local DHCP server.

Crossing Time Zones

DealershipMain offices

Time Zones In The CoralCoral IPx

GMT +2

Israel

GMT - 5

USA

GMT

UK

GMT +1

Europe

GMT +7

China

WAN

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• IP Survivability– Call agents have been increased from (2) to (10).– If connected to a secondary Call Agent, the IP

phone will periodically attempt to communicate with the Primary Call Agent. If found it will revert back to the Primary.

IP survivability

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VoIP - FXS/FXO

• Remote Fax, SLT or PSTN Connections

– FXS (MGCP) – IST, CID, MWI, Fax (T.38), Modem

– 2, 4, 8 and 24 Ports– FXO (MGCP) – CID, FAX and Modem

– 4 and 8 Ports

Gateways

• FXS supports– Fax– Modem– Cordless phones– Credit card scanners

• FXO supports– Local dialing from

branch office– 911 dialing local– Toll bypass

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Coral Sentinel Pro

• A Session Border Controller (SBC) terminal• Proxy for remote IP terminals (MGCP & SIP)• Addresses NAT / FW Traversal’• Located in the DMZ • Scalable

Sentinel Pro

• NAT traversal is an issue with all VoIP protocols (H323, MGCP and SIP)

• Tadiran Telecom has developed the Sentinel Pro– Sentinel – Session Border Control (SBC)– Proxy server for signaling– Relay for RTP

Specific private static IP addresses and ports are open in the firewall to allow the Sentinel Pro and remote VoIP devices to talk to PUGW

Firewall Tunneling

•Remote Coral VoIP devices access the Sentinel Pro in the company’s DMZ area

•Secure communications to the Coral passes through the Sentinel Pro.

NAT Support

•Non supported IP address formats are converted to support IP address formats.

•PUGW card supports one VoIP device per IP address. The Sentinel Pro converts VoIP devices that may share an IP address to unique numbers.

Sentinel Pro Sizes

• SBC Pro 10

• SBC Pro 25

• SBC Pro 75

• SBC Pro 150

• 10 concurrent calls using G.729

• 25 concurrent calls using G.729

• 75 concurrent calls using G.7.29

• 150 concurrent calls using G.7.29

Vo ip

Technology

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