1. Making It Work:
Best Practices for Deploying
Microsoft OCS w/ SIP Trunking
May 11, 2010
Matt Edic Prepared for:
Vice President
Enterprise Business Development & Sales
medic@intelepeer.com
+1 720.889.9519

2. Transformation
Cloud-based, Universal Availability,
IP Peering Network
Connectivity
On-demand, Software API-driven
Value
Cost Savings, Transition from Capital
Intensive to Usage-based Model
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3. On-demand scalable Cloud Communications
infrastructure connecting anyone,
anywhere on any device.
API
Self Service
Web Portal
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4. IntelePeer’s Voice Peering Network
 Triple redundant,
geographically dispersed, all
IP network IntelePeer Carrier-grade
 High quality,scalable,software Voice Peering Network
driven network
 Comprehensive jitter, latency,
and security controls New York
HQ – Silicon Valley NOC - Denver Chicago
(San Mateo)
 Direct access to 349M TNs in EMEA
APAC
North America Los Angeles
Atlanta
London
Dallas
 Private and Public internet POP & Office
Locations
access Private IP (GigE)
 Enhanced Network for
services beyond voice 60 + Peering Partners
 Supports TDM and VoIP
network interoperability
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5. World Class Relationships
Customers Peering Partners
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6. Voice Peering Services
TM
AppworX
Communications-enabled applications & Web API
Origination Termination
Web • Toll Free • U.S. In-state
• Interstate
Portal • In-state
REST API • Number Assignment • U.S. Interstate
• Enhanced Routing
SIP • International
Public or • Local/DID
Private • Number Assignment • Short Duration
• Number Porting
• U.S. Directory Listing
TDM • Caller ID / Caller Name • Pricing by
• Flat Rate
• OCN/LATA
• NPA/NXX
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7. IntelePeer Direct Peering
Delivering Significant Cost Savings
Traditional Routing Uses 4+ Hops
PSTN not
designed for
video / IM
New Paradigm of Communications
Peering enables Peering Peering
voice / video / IM Partner Partner
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8. SIP Trunking Compatibility
Enabling
Transformation

9. Microsoft Qualification
 Qualification Process
– ~10 providers worldwide (6 U.S. based)
– Run by 3rd party testing organization
– Approximately 200 test cases
– Includes: Security, Hold, Transfer, ISDN Mapping, Media Handling,
error conditions
 Technical Support Alliance Network (TSANet)
– Membership required by Microsoft
– Cooperative Multi-Vendor Support
– Focus on Customer Satisfaction
– Members of all sizes participate
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10. Reference Architecture
Your Public IP /
Network Private IP
Mediation
Server
Peering
Peering
Peering
Partners
Partners
Partners
SIP Trunk (or PSTN)
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11. Common Activation Issues
 Mediation Server Challenges
– Private/Public IP settings
– Use G.711 codec
– Single trunk first….then add redundancy
– Add security setting AFTER initial call success
 Firewall Challenges
– Double-check Network Address Translation (NAT)
– Symptoms are 1-way audio, clipping, signaling timeouts that lead to fast busy
 Test Using
– 1 DID for Auto-Attendant
– 1 DID for Voice Mail Access
– 1 DID for Conference Bridge
– 2 DID for Users
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12. Building With Quality
 Interconnection
– Use Public Internet first to validate call flow
– Move to VPN or Private IP connection, if needed
 Mediation Server
– SIP Trunk Redundancy (avoid maintenance downtime)
– Use 2 mediation servers or domain name server (DNS) for multiple trunks
 Security Considerations
– Virtual Private Network (VPN)
– Transport Layer Security (TLS) for signaling
– Secure Real Time Protocol (SRTP) for media
 Quality Considerations
– Utilize provider trial/interop period….is your network really ready?
– SIP Trunk provider quality reporting
– Answer Seizure Ratio, Post Dial Delay, PESQ/MOS
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13. Keys To Evaluate Providers
 Geographic Coverage
– No single carrier provides 100% geographic coverage
– Make sure you ask about expected coverage areas upfront
– More challenging with centralized architectures
 Caller ID (CID) / Caller Name (CNAM)
– Support varies by provider
 Ask about SLAs & Turn Around Times
– SIP trunk turn up
– Adding Phone Numbers
– Moving Numbers to New Providers
 Moving Numbers To New Providers
– Local Number Portability (LNP) & Responsible Organization (RespOrg)
– Letter of Authorization (LOA)…signature matters!
– Copy of last phone bill to prove ownership
 E911 Support
– Need “Wave 14” / Microsoft Communications Server 2010 to fully support
– Support for 911 solutions available, but check state-level requirements
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14. Fast Start Program
SIP Trunking for Microsoft OCS 2007 R2
 Inbound & outbound services; providing DIDs, Toll Free Numbers, U.S. and International Long
Distance
 30 day evaluation period (no cost, non-binding) to ensure IntelePeer is the right fit
– 10 DIDs provided for OCS auto-attendant, voice mail access, conference bridge, and direct numbers for
testing
– 10 simultaneous call paths
– For evaluation, connect via SIP trunk over public internet using OCS Mediation Server
– Connect to our production network…not a lab environment
 Next steps for evaluation are to sign IntelePeer Mutual NDA and Evaluation Agreement
IntelePeer SIP Trunking for Microsoft OCS 2007 R2
http://www.intelepeer.com/MicrosoftPartner/business-value.php
Email: SIP@intelepeer.com
1-877-336-9171
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15. Thank You
Matt Edic
+1 (720) 889-9519
medic@intelepeer.com
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