Technical strategy secure sip trunking in legacy pstn pbx environments
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Technical Strategy: Secure SIP Trunking in Legacy PSTN/PBX Environments. Scott Beer Ingate [email protected] Rich Poole Dialogic [email protected] September 2, 2009. The SIP Trunking Enabler. Agenda. How Are Gateways Used Today? What Does A Gateway Do?

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Technical Strategy: Secure SIP Trunking in Legacy PSTN/PBX Environments

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Technical strategy secure sip trunking in legacy pstn pbx environments

Technical Strategy: Secure SIP Trunking in Legacy PSTN/PBX Environments

Scott Beer

Ingate

[email protected]

Rich Poole

Dialogic

[email protected]

September 2, 2009

The SIP Trunking Enabler


Agenda

Agenda

  • How Are Gateways Used Today?

  • What Does A Gateway Do?

  • SIP Trunking Deployment – Issues & Options

  • Gateway Installation & Configuration


Technical strategy secure sip trunking in legacy pstn pbx environments

How Are Gateways Used Today?

Select Use Case Examples

  • Distributed IP Voice Messaging

  • Distributed IP Contact Center

  • Unified Communications:

    • Microsoft Office Communications Server 2007

    • IBM Lotus Sametime Unified Telephony

    • Motorola Total Enterprise Access & Mobility

    • Asterisk Business Edition

  • Fax over IP

  • SIP Trunking


How are gateways used in the enterprise ip voice messaging use case

How are Gateways Used in the Enterprise?IP Voice Messaging Use Case*

Digital Station Phones

Centralized Messaging / IVR

Brussels

Digital Station Emulation

Media Gateway

Nortel Meridian

LAN

T1 Media Gateway

Munich

WAN

Avaya

G3 PBX

E1 Media Gateway

Siemens

Hicom

Legacy Phones

Legacy

Phones

Analog

Media Gateway

PSTN

Ericsson

MD110

Stockholm

Legacy Phones

Headquarters

Remote Offices

* - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


How are gateways used in the enterprise distributed ip contact center use case

How are Gateways Used in the Enterprise?Distributed IP Contact Center Use Case*

Media Gateway

* - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


How are gateways used in the enterprise microsoft office communications server 2007 use case

MS UC Mediation Server

Basic Media Gateway

legacy

PBX

“Tanjay” phones

PSTN

Active directory

Basic Hybrid Media Gateway

Microsoft® Office Communicator 2007

How are Gateways Used in the Enterprise?Microsoft® Office Communications Server 2007 Use Case*

OCS Server(s)

* - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


How are gateways used in the enterprise ibm lotus sametime unified telephony use case

How are Gateways Used in the Enterprise?IBM® Lotus®Sametime® Unified Telephony Use Case*

T1/E1

T1/E1

* Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide.


How are gateways used in the enterprise motorola team total enterprise access mobility use case

How are Gateways Used in the Enterprise?Motorola TEAM (Total Enterprise Access & Mobility) Use Case*

“The TEAM VoWLAN solution turns the desktop into a pocketable virtual office.”

www.motorola.com

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


How are gateways used in the enterprise media gateway asterisk business edition use case

How are Gateways Used in the Enterprise?Media Gateway + Asterisk Business Edition Use Case*

Asterisk Business Edition

Media

Gateway

Media Gateways Enable Applications Built on Asterisk Business Edition

Allows Asterisk Developers to Augment Existing PBX Functionality

* - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


How are gateways used in the enterprise foip server solution use case

How are Gateways Used in the Enterprise? FoIP Server Solution Use Case*

Enables FoIP Server in TDM and Hybrid PBX Environment

Enables Fax Server to be Deployed as a Virtual Server

Enables Centralized Fax Servers for Multi-Site Organizations

T.30 Fax

T.38 FoIP

Media Gateway

PSTN

FoIP software-based Fax Server

PBX

Media Gateway

WAN

Remote Site

PBX

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


How are gateways used in the enterprise sip trunking for legacy pbx and contact centers

Legacy PBX with

system

phones

How are Gateways Used in the Enterprise? SIP Trunking for Legacy PBX and Contact Centers

IP Telephony Service Provider

IP Network

PSTN

Service Provider

Gateway

Broadband Internet Access

Circuit Switched Voice Access

(Optional)

SIP Trunking Service

Border Element

Firewall

Circuit Switched Voice Access

Corporate Voice and Data LAN

VoIP

Gateway

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


Technical strategy secure sip trunking in legacy pstn pbx environments

What does a Gateway Do?


What does the gateway do

-Inputs/Outputs

Legacy PBX with

system

phones

What does the Gateway do?

IP Telephony Service Provider

IP Network

PSTN

TDM Interface

Transport:T1 or DS3

[Dig. Station Emulation, Analog]

Signaling:ISDN PRI, QSIG

[CAS, Serial (SMDI, MCI, MD-110)]

Voice: PCM

Service Provider

Gateway

Broadband Internet Access

Circuit Switched Voice Access

(Optional)

SIP Trunking Service

Border Element

Firewall

Circuit Switched Voice Access

Corporate Voice and Data LAN

VoIP

Gateway

IP Interface:

Transport:IP

Signaling:SIP over UDP, TCP (or TLS)

Voice:G.7xx over RTP/RTCP (or sRTP)

QoS:DiffServ

Management Interface:

Config:HTTP (or HTTPs) Web GUI

[Telnet, Serial, RS-232]

Event Mgt.:SNMP, SMTP

SW Mgt.:BootP, TFTP

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


What does the gateway do internal bearer

Legacy PBX with

system

phones

What does the Gateway do? -Internal Bearer

Bearer Processing:

Voice:- G.711, G.729AB, G.723.1, etc.

- G.168 Echo Cancellation

- VAD, SS, CNG

- [other codecs]

Tones:- DTMF Digit Relay (RFC2833 or SIP Info)

- Call Progress Detection (PVD, PAMD, DTMF, Fax Tone, Progress Tone, …)

Fax:- T.38 Fax over IP, G.711 Fax Bypass (T.30/G.711)

IP Telephony Service Provider

IP Network

PSTN

Service Provider

Gateway

Broadband Internet Access

Circuit Switched Voice Access

(Optional)

SIP Trunking Service

Border Element

Firewall

Circuit Switched Voice Access

Corporate Voice and Data LAN

VoIP

Gateway

Additional Controls:

- Gain Control for IP-TDM & TDM-IP

- Echo Cancellation Parameter

- Voice Activity Filters

- Call Progress Filters

Transport Mediation:

Transport:TDM-to-SIP

TDM-to-TDM

SIP-to-SIP

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


What does the gateway do internal processing

Legacy PBX with

system

phones

What does the Gateway do? -Internal Processing

Supplementary Services:

  • Hold/UnHold

  • Call Transfer

    • Blind Transfer

    • Supervised Transfer

  • Message Waiting Indicator (MWI)

  • ANI / DNIS / Call Diversion Info

  • CPID

IP Telephony Service Provider

IP Network

PSTN

Service Provider

Gateway

Broadband Internet Access

Circuit Switched Voice Access

(Optional)

SIP Trunking Service

Border Element

Firewall

Circuit Switched Voice Access

Corporate Voice and Data LAN

VoIP

Gateway

Call Routing:

  • Digit Manipulation

  • Call Routing Engine

  • Alternate Routing for TDM & IP

  • Trunk Group Management

  • IP Route Management

  • Call Processing:

  • Call Setup/Teardown

  • Codec Negotiation

  • Fax Negotiation

  • DTMF Digit Relay

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


Technical strategy secure sip trunking in legacy pstn pbx environments

SIP Trunking Deployment Issues & Options


How are gateways deployed for sip trunking

How are Gateways Deployed for SIP Trunking?

  • Issues:

    • Do I need to move all communciations to SIP?

    • How do I handle multiple offices & optimize deployments?

    • Bandwidth Requirements

      • How much is used already for data

      • Need to prioritize voice (more real-time)

    • Gateway & PBX Interop

    • Availability Considerations

      • Multiple Gateways

      • Alternate Routing

      • Failover upon power failure

    • How do you handle Fax?


Evolution of ip fax foip

Evolution of IP Fax (FoIP)

  • T.37

    • Store and forward

    • Scan image, attach to email, and send

    • Not real time – no receipt confirmation

  • G.711 Pass Through

    • Encode fax audio for IP transport

    • Heavy bandwidth requirements

    • Susceptible to latency – high failure rate

  • T.38 FoIP

    • Created by the ITU to resolve the above issues


T 38 reliable ip fax

T.38 – Reliable IP Fax:

  • Standard for real time IP Fax defined by ITU

  • Widely adopted by router manufacturers

  • Resolves latency issue that plagues G.711

  • Uses much less bandwidth

    • ~ 35% of the bandwidth required by G.711

  • Preserves user experience

    • Positive receipt confirmation

  • Compliant to industry standards

    • Not T.37 store and forward as an email attachment

  • Dialogic was a primary contributor to the T.38 spec


Legacy configuration use case

Legacy Configuration Use Case*

IP Network

PSTN

Circuit Switched Trunking

Broadband Internet Access

Firewall

Corporate LAN

Legacy PBX

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


Sip trunking for legacy pbx and contact centers phased sip trunking outbound only use case

SIP Trunking for Legacy PBX and Contact Centers Phased SIP Trunking – Outbound Only Use Case*

IP Telephony Service Provider

PSTN

IP Network

Service Provider

Gateway

Broadband Internet Access

SIP Trunking Service

Border Element

Fax

Firewall

Circuit Switched Voice Access

  • Outbound traffic:Routed through SIP Trunking

  • Inbound traffic:Continues to be routed to PSTN

  • Fax:Routed through PSTN

  • Routing outbound calls to SIP Trunks could lower costs*

  • Route outbound traffic to Gateway (except from Fax extensions)

  • PSTN connection still available as alternate route for outbound traffic*

  • * Requires program change to PBX)

Corporate Voice and Data LAN

Legacy PBX

PSTN-VoIP

Gateway

Inbound

Outbound

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


Sip trunking for legacy pbx and contact centers phased sip trunking pstn alt route use case

SIP Trunking for Legacy PBX and Contact CentersPhased SIP Trunking – PSTN Alt Route Use Case*

IP Telephony Service Provider

PSTN

IP Network

Service Provider

Gateway

Broadband Internet Access

SIP Trunking Service

Border Element

Alt Route

Fax

Firewall

Circuit Switched Voice Access

Corporate Voice and Data LAN

Legacy PBX

  • Outbound traffic:Routed to SIP Trunking

  • Inbound traffic:Routed to SIP Trunking

  • Fax:Routed through Gateway to/from PSTN

  • No or minimal change to PBX

  • Legacy PSTN available as Alternate Route for overflow traffic or as backup to SIP Trunks (IP or Power Failure)

PSTN-VoIP

Gateway

Inbound

Outbound

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


Sip trunking for legacy pbx and contact centers full sip trunking solution use case

SIP Trunking for Legacy PBX and Contact CentersFull SIP Trunking Solution Use Case*

IP Telephony Service Provider

PSTN

IP Network

Service Provider

Gateway

Broadband Internet Access

SIP Trunking Service

Border Element

Fax

Firewall

Circuit Switched Voice Access

Corporate Voice and Data LAN

Legacy PBX

  • Outbound traffic:Routed to SIP Trunking

  • Inbound traffic:Routed to SIP Trunking

  • Fax:Routed through Gateway

  • No or minimal change to PBX

  • Disconnection from legacy PSTN – lower costs

  • T.38 is preferred for fax, but G.711 Fax Relay may be acceptable

PSTN-VoIP

Gateway

Inbound

Outbound

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


Sip trunking for legacy pbx and contact centers remote office sip trunking centralized use case

SIP Trunking for Legacy PBX and Contact CentersRemote Office SIP Trunking - Centralized Use Case*

PSTN

IP Telephony Service Provider

PSTN

IP Network

Legacy

PBX

Circuit Switched Voice Access

Broadband Internet Access

SIP Trunking Service

Border Element

Remote Office

Firewall

Corporate Voice & Data LAN

Legacy PBX

Corp Intranet

Circuit Switched Voice Access

Corporate Voice & Data LAN

VoIP

Gateway

  • Corporate traffic over Intranet – lower costs

  • Concentrate PSTN access through SIP Trunks

  • OptionalRemote PSTN Access through gateway

  • Reduced remote legacy PSTN – lower costs

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


Sip trunking for legacy pbx and contact centers remote office sip trunking distributed use case

SIP Trunking for Legacy PBX and Contact CentersRemote Office SIP Trunking – Distributed Use Case*

PSTN

IP Telephony Service Provider

IP Network

IP Network

SIP Trunking Service

SIP Trunking Service

Broadband Internet Access

Remote Office

Border Element

Corporate Voice & Data LAN

Corp Intranet

Legacy PBX

Circuit Switched Voice Access

Corporate Voice & Data LAN

VoIP

Gateway

  • Corporate data traffic over Intranet

  • Leverage ITSP Network with remote SIP Trunks

  • Remote PSTN available through gateway, if needed

  • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide


Technical strategy secure sip trunking in legacy pstn pbx environments

Gateway Installation & Configuration


Installation summary

Installation Summary

  • Connection to PBX

    • Connect Gateway to PBX

    • Configure PBX to send calls to Gateway

    • Configure Gateway to connect to PBX

  • Connection to LAN

    • Connect Gateway to LAN

    • Configure SIP Trunking Provider to connect to Gateway

    • Configure Gateway to connect to SIP Trunking Provider

  • Test connections to PBX and SIP Trunking Provider


  • Gateway configuration

    Gateway Configuration

    • Simplified Configuration Management & Troubleshooting


    Summary

    Summary

    89% Growth!

    • SIP Trunking demand is accelerating and moving upstream from SMB to the Enterprise

    • Ingate SIParator® and Ingate Firewall® products provide a secure, scalable and interoperable enterprise edge for SIP Trunking Services

    • Dialogic provides enterprise class media gateways to enable SIP trunking for legacy PBX and contact centers

    • Ingate and Dialogic provide interoperable products that enable a rapid return on investment from SIP Trunking deployments

    • SIP Trunk adoption moves an enterprise towards richer multi-media and unified communications services across public IP networks

    +


    Questions

    Questions?

    • For more information visit:

      • www.dialogic.com/solutions/uc/ingate.htm

      • www.dialogic.com/products/gateways/

      • www.ingate.com

        … or contact us directly

        • Rich Poole: [email protected]

        • Scott Beer: [email protected]

          Thanks for attending!


    Technical strategy secure sip trunking in legacy pstn pbx environments

    Dialogic, Dialogic Pro, Brooktrout, Diva, Cantata, SnowShore, Eicon, Eicon Networks, NMS Communications, NMS (stylized), Eiconcard, SIPcontrol, Diva ISDN, TruFax, Exnet, EXS, SwitchKit, N20, Making Innovation Thrive, Connecting to Growth, Video is the New Voice, Fusion, Vision, PacketMedia, NaturalAccess, NaturalCallControl, NaturalConference, NaturalFax and Shiva, among others as well as related logos, are either registered trademarks or trademarks of Dialogic Corporation or its subsidiaries (“Dialogic”). Ingate, Ingate Firewall, and Ingate SIParator are registered trademarks of Ingate Systems AB. Other names of actual companies and products mentioned herein are the trademarks of their respective owners. Dialogic encourages all users of its products to procure all necessary intellectual property licenses required to implement their concepts or applications, which licenses may vary from country to country. Dialogic may make changes to specifications, product descriptions, and plans at any time, without notice.

    USE CASE(S)Any use case(s) shown and/or described herein represent one or more examples of the various ways, scenarios or environments in which Dialogic products can be used.  Such use case(s) are non-limiting and do not represent recommendations of Dialogic as to whether or how to use Dialogic products.

    06/09

    www.dialogic.com


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