Technical Strategy:
Secure SIP Trunking in Legacy PSTN/PBX
Environments
Rich [email protected]
The SIP Trunking Enabler
Scott [email protected]
September 2, 2009
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 2
Agenda
How Are Gateways Used Today?
What Does A Gateway Do?
SIP Trunking Deployment – Issues & Options
Gateway Installation & Configuration
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 3
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
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 4
How are Gateways Used in the Enterprise?IP Voice Messaging Use Case*
Centralized Messaging / IVR
Digital Station Phones
Legacy Phones
Brussels
Munich
Stockholm
Headquarters
Legacy Phones
Avaya G3 PBX
WAN
Nortel Meridian
Remote Offices
Siemens Hicom
Legacy Phones
EricssonMD110
Digital Station EmulationMedia Gateway
E1 Media Gateway
Analog Media Gateway
T1 Media Gateway
* - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
PSTN
LAN
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 5
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
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 6
How are Gateways Used in the Enterprise?Microsoft® Office Communications Server 2007 Use Case*
PSTN
legacyPBX
Active directory
Microsoft® Office Communicator 2007
“Tanjay” phones
Basic Media Gateway
MS UC Mediation Server
Basic Hybrid Media Gateway
OCS Server(s)
* - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 7
How are Gateways Used in the Enterprise?IBM® Lotus® Sametime® Unified Telephony Use Case*
* Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide.
T1/E1
T1/E1
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 8
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
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 9
How are Gateways Used in the Enterprise?Media Gateway + Asterisk Business Edition Use Case*
Allows Asterisk Developers to Augment Existing PBX Functionality
* - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
Asterisk Business Edition
Media Gateways Enable Applications Built on Asterisk Business Edition
MediaGateway
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 10
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
PSTNFoIP software-based
Fax Server PBX
Media Gateway
T.38 FoIPT.30 Fax
PBXRemote Site WAN
• - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
Media Gateway
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 11
How are Gateways Used in the Enterprise? SIP Trunking for Legacy PBX and Contact Centers
PSTNIP Network
Firewall
Broadband Internet Access
IP Telephony Service Provider
Border Element Legacy
PBX with system phones
VoIP Gateway
Circuit Switched Voice Access
Corporate Voice and Data LAN
SIP Trunking Service
Service Provider Gateway Circuit Switched
Voice Access(Optional)
• - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 12
What does a Gateway Do?
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 13
Circuit Switched Voice Access
Circuit Switched Voice Access
(Optional)
What does the Gateway do?
PSTNIP Network
Firewall
Broadband Internet Access
IP Telephony Service Provider
Border Element Legacy
PBX with system phones
Corporate Voice and Data LAN
SIP Trunking Service
Service Provider Gateway
VoIP Gateway
-Inputs/Outputs
TDM InterfaceTransport: T1 or DS3
[Dig. Station Emulation, Analog]Signaling: ISDN PRI, QSIG
[CAS, Serial (SMDI, MCI, MD-110)]Voice: PCM
Management Interface:Config: HTTP (or HTTPs) Web GUI
[Telnet, Serial, RS-232]Event Mgt.: SNMP, SMTPSW Mgt.: BootP, TFTP
IP Interface:Transport: IPSignaling: SIP over UDP, TCP (or TLS)Voice: G.7xx over RTP/RTCP (or sRTP)QoS: DiffServ
• - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 14
Circuit Switched Voice Access
Circuit Switched Voice Access
(Optional)
What does the Gateway do? -Internal Bearer
PSTNIP Network
Firewall
Broadband Internet Access
IP Telephony Service Provider
Border Element Legacy
PBX with system phones
Corporate Voice and Data LAN
SIP Trunking Service
Service Provider Gateway
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-TDMSIP-to-SIP
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)
• - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 15
Circuit Switched Voice Access
Circuit Switched Voice Access
(Optional)
What does the Gateway do? -Internal Processing
PSTNIP Network
Firewall
Broadband Internet Access
IP Telephony Service Provider
Border Element Legacy
PBX with system phones
Corporate Voice and Data LAN
SIP Trunking Service
Service Provider Gateway
VoIP Gateway
Call Processing:- Call Setup/Teardown- Codec Negotiation- Fax Negotiation- DTMF Digit Relay
Call Routing:- Digit Manipulation- Call Routing Engine- Alternate Routing for TDM & IP- Trunk Group Management- IP Route Management
Supplementary Services:- Hold/UnHold- Call Transfer
- Blind Transfer- Supervised Transfer
- Message Waiting Indicator (MWI)- ANI / DNIS / Call Diversion Info- CPID
• - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 16
SIP Trunking Deployment Issues &
Options
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 17
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?
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 18
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
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 19
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
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 20
Legacy Configuration Use Case*
IP Network
Firewall
Broadband Internet Access
Circuit Switched Trunking
Corporate LAN
Legacy PBX
PSTN
• - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 21
SIP Trunking for Legacy PBX and Contact Centers Phased SIP Trunking – Outbound Only Use Case*
Firewall
PSTN-VoIP Gateway
Circuit Switched Voice Access
Corporate Voice and Data LAN
SIP Trunking Service
Service Provider Gateway
Inbound
Outbound
Fax
Legacy PBX
Broadband Internet Access
Border Element
PSTNIP Network
IP Telephony Service Provider
Outbound traffic: Routed through SIP TrunkingInbound traffic: Continues to be routed to PSTNFax: 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)
• - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 22
SIP Trunking for Legacy PBX and Contact CentersPhased SIP Trunking – PSTN Alt Route Use Case*
Firewall
PSTN-VoIP Gateway
Circuit Switched Voice Access
Corporate Voice and Data LAN
SIP Trunking Service
Service Provider Gateway
Inbound
Outbound
Fax
Alt R
oute
Legacy PBX
Broadband Internet Access
Border Element
PSTNIP Network
IP Telephony Service Provider
Outbound traffic: Routed to SIP TrunkingInbound traffic: Routed to SIP TrunkingFax: 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)
• - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 23
SIP Trunking for Legacy PBX and Contact CentersFull SIP Trunking Solution Use Case*
Firewall
Broadband Internet Access
Border Element
PSTN-VoIP Gateway
Circuit Switched Voice Access
Corporate Voice and Data LAN
SIP Trunking Service
Service Provider Gateway
Inbound
Outbound
Fax Legacy PBX
PSTNIP Network
IP Telephony Service Provider
Outbound traffic: Routed to SIP TrunkingInbound traffic: Routed to SIP TrunkingFax: 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
• - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 24
SIP Trunking for Legacy PBX and Contact CentersRemote Office SIP Trunking - Centralized Use Case*
Firewall
Broadband Internet Access
Border Element
VoIP Gateway
Circuit Switched Voice Access
Corporate Voice & Data LAN
SIP Trunking Service
Legacy PBX
Circuit Switched Voice Access
PSTN
Corporate Voice & Data LAN
Corp Intranet
Remote Office
Legacy PBX
PSTNIP Network
IP Telephony Service Provider
• Corporate traffic over Intranet – lower costs• Concentrate PSTN access through SIP Trunks• Optional Remote 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
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 25
PSTN
SIP Trunking for Legacy PBX and Contact CentersRemote Office SIP Trunking – Distributed Use Case*
Broadband Internet Access
Border Element
VoIP Gateway
Circuit Switched Voice Access
Corporate Voice & Data LAN
SIP Trunking Service
Legacy PBX
IP NetworkSIP
Trunking Service
IP NetworkIP Telephony
Service Provider
Corporate Voice & Data LAN
Corp Intranet
Remote Office
• 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
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 26
Gateway Installation & Configuration
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 27
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
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 28
Gateway Configuration
Simplified Configuration Management & Troubleshooting Initial Config•Use Serial Cable or Telnet to GW; Login; run ‘quickcfg’•Set IP Address / Subnet for Gateway & Default Network Gateway•Set T1/E1 & PBX Signaling Type (ISDN / CAS)•Restart Gateway
Web GUI •Login to Gateway•Disable BootP (else GW gets IP Addr from DHCP Server)
TDM Config•Set PCM Coding – µLaw (T1) , aLaw (E1)•Per span, set Line Encoding & Framing (e.g.: B8ZS & ESF)•Per ISDN span, set to “Network” or “Terminal” (Opposite of endpoint)•Enable “Failover” if Gateway is between PBX & PSTN
VoIP Config•Set IP Transport to UDP, TCP (or TLS)•Set Audio Compression – G.711-µLaw , G.711-aLaw, …•Set VAD on/off•Set RFC3960 Early Media on
Routing Config•Set up TDM Trunk Group(s) (e.g. PSTN, PBX, etc.)•Set up VoIP Host Group(s) (IP Endpoints)•Config Inbound TDM rules per Trunk Group – Specify Routing & Normalization•Config Inbound VoIP rules per VoIP Host Group & Number Normalization
Restart Gateway•Make Connections•Use built-in Trace Tools, Wireshark, ... to verify proper operation•Ready to use
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 29
Summary
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
89% Growth!
+
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 30
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!
© Copyright 2009 Dialogic Corporation. All rights reserved.
Slide 31
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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