1. Charles Rutledge VP Marketing Quintum Technologies, Inc.
Out of Sight, But Not Out of Touch: Remote Office/ Branch Office IP Telephony Solutions
Charles Rutledge
VP Marketing
Quintum Technologies, Inc.

2. Remote Office/ Branch Office IP Telephony Solutions
Goal – Provide A Practical Perspective To The Deployment of Branch Office IP Telephony Solutions
Enterprise Globalization
Benefits of IP Telephony to the Branch Office
Deployment Strategies
IP Telephony Issues
Branch Office Case Studies
Summary

3. More Than Ever, Branch Offices Are Critical For Successful Businesses
Increased globalization and aggressive competition.
Local presence around the world
Extend market reach and enhance customer care.
Branch offices are a critical link between the enterprise and its clients
Greater outsourcing
Customers, suppliers and partners interact much more closely on projects and operations

4. One Of The Major Benefits Of IP Telephony Is Serving Branch Offices
Headquarters
Branch Office
IP Voice Servers
VoIP Gateway
PSTN
Branch Office Gateway
Analog Telephony Devices
IP NETWORK
Analog VoIP Gateway
Benefits
Feature Transparency
Centralized Applications
Centralized Management
Cost Savings
Analog Phones
Fax Machines
IP Phones
IP Phones

5. IP Telephony Can Also Provide Significant Savings
Attractive ROI on LD calling
Domestic calling can pay back in less than a year
International calling can pay back in WEEKS!!
Consolidation of Telephony Services
Consolidate toll and inbound 800 calling
Less Investment Than Traditional PBXs
Up to 40% less expensive than traditional PBX solutions
Administrative costs can be lowered
A single voice and data network (Administration – Training)
Centralized administration for multiple sites
Lower costs for (MACs) Moves, Adds, and Changes

6. Source: Phillips Group InfoTech
IP Telephony Brings Valuable Convergence Sophistication To The Branch Office
Open Architecture
Ability to utilize different vendors to support specific businesses needs
PDA Phone – Wireless Phone
No vendor lock in!
Improved Productivity For Users
Unified Messaging
20 to 40 minutes saved per day per user!
Web application integration
80% of Fortune 500 firms see the primary value of IP telephony as applications that help transform their business!
Source: Phillips Group InfoTech

7. IP Telephony Places Unique Requirements On Branch Office Deployments
Survivability: What happens when IP connectivity is lost?
Local support of basic calling capabilities when connectivity with the server is lost
Calls must be routed to the PSTN when the IP is not available
Integration with standard telephony devices
Analog phones – Fax machines
Access to the PSTN
Local calls - 911

8. There Are A Variety Of Possible Deployment Strategies
Greenfield sites
Build a completely converged infrastructure
Begin in a branch office
Smaller controlled environment
Interoperate with the existing PBX at the main site
Expand capacity at the main site with IP telephones
Begin with a particular group or organization
Expand to other organizations and branch offices
You can start small and grow at a comfortable pace

9. - Deployment Strategy - Radical Revolution Or Easy Evolution
Either may fit your needs best – or something in between
IP PBX
Mixed Infrastructure
Converged PBX
IP Voice Server
PBX
PBX
VoIP Gateway
PSTN
IP NETWORK
IP NETWORK
IP NETWORK
PSTN
PSTN
Branch Office Gateway
Branch Office Gateway
Branch Office Gateway

10. Deployment Issues Of IP Telephony- Particularly In The Branch Office
Voice Quality
QoS
Bandwidth Requirements
Protocol - Standards
H.323 vs. SIP
Legacy Infrastructure
Network Integration
Security
NAT/Firewall - VPN
Availability/Survivability
Review Existing Infrastructure – Plan The Network

11. Resources: http://www.sipcenter.com http:// www.protocols.com
H.323 Or SIP – Which To Use?
Today, it is an H.323 world
Established protocol – lots of it out there
Lots of vendors’ equipment interoperates
Telephony like signaling – complex
SIP offers promise for the next generation
Newer standard – Internet based
Simpler – Create “sessions”
Like HTTP – Wealth of available development resources
Integration with web based applications
Access via any SIP enabled technology – phone, video, IM
Both will likely survive and interoperate
Open Standards – Take advantage of it
Resources:

12. Resources: http://www.erlang.com
Good Network Characteristics Are Required To Support High Quality Voice
Business LANs today provide good network characteristics – Better voice than the PSTN
Switched Ethernet to the desktop – lots of bandwidth
Estimate bandwidth requirements
LAN –G.711 with 20 ms packetization
Assume worst case busy hour - 1 of 4 phones
WAN characteristics are more challenging
Latency: Typical <100 ms Maximum < 200ms
Jitter: Typical < one sample Maximum < 40ms
Packet Loss: Typical – < 1% Maximum <5%
85% maximum utilization at peak traffic
Resources:

13. Compression Can Minimize Bandwidth Requirements On The WAN
VoIP on the WAN can provide “PSTN Quality” voice!
Understand and minimize bandwidth requirements
G.729/G.723
Silence suppression
35% savings
Header compression
50% savings
RTP multiplexing
Up to 50% savings

14. QoS Can Help Support Good Voice Quality
Support of VLAN and QoS capabilities
IP Phones support VLAN tagging
VLAN dedicated to voice and signaling traffic – 802.1q
Prioritization – 802.1p
VoIP devices support TOS or DiffServ
Prioritize voice traffic through the routers and switches
Required at every point in the network
Resources:

15. Security For The Media – Who Could Be Listening In?
There are steps that can improve security of the media stream.
Protection behind the firewall
Support with some VoIP NAT capability
Put VoIP equipment on virtual LANs and enable the security features on the switches.
VPN routes between sites to support VoIP
Latency? QoS?
RTP encryption where possible

16. Survivability Is Critical – You Never Want To Lose The Phones
Deploy Redundant Voice Servers
Deliver power to the phones over the Ethernet
Ethernet switches deliver the power on back-up power supplies
Remote office gateway must be able to support calls when the connection to the server is lost
Back-up call management – support IP calling to other locations
Real-time PSTN back-up when IP connectivity is lost

17. Two Case Studies Demonstrate The Value Of IP Telephony In Supporting Branch Offices
Municipality of Saint Hyacinthe, Quebec Canada
A full scale IP Telephony deployment with over 150 branch locations.
John Akridge Companies
A migration to IP Telephony leveraging the existing PBX at the headquarters location.

18. One VoIP Network Supports The Telephony Needs For The St
One VoIP Network Supports The Telephony Needs For The St. Hyacinthe Municipality
A community in Quebec, Canada
150 Schools
5 Health care facilities
10 municipal government buildings
Deployed a new IP-based telephony system throughout all the facilities, and integrated portions of the existing analog infrastructure.

19. St. Hyacinthe Deployed Two Central VoIP PBXs That Supported All The Locations
The main location and 150+ branch locations were supported with 2 Nortel Succession 1000s.
Nortel IP phones were deployed in the network with Quintum® Tenor® VoIP switches as branch office gateways.
Quintum Tenor VoIP switches provided local connectivity to the PSTN, and integrated the analog devices into the Succession network.

20. Branch Locations Needed To Be Seamlessly Integrated Into The VoIP Network
Branch sites had requirements for a mix of new IP telephones and the integration of existing analog telephony equipment.
Existing analog phones - garages and hall phones
Cordless phones used by hospital personnel
Paging systems in the schools
Intercoms/Elevator phones
Fax Machines
Branch sites also required local telephony connectivity.
Survivability
911

21. St. Hyacinthe IP Telephony Network
Nortel i2004 IP Phones
Intercoms
Nortel Succession 1000
A800
Paging Systems
MAN
911 & Hop Off
Cordless Phones
PSTN
Analog Devices
A800
Nortel i2004 IP Phones
St. Hyacinthe Remote Locations:
Schools, Municipal Buildings,
Garages and Healthcare facilities
St. Hyacinthe, Canada:
Main Location

22. St. Hyacinthe Realized A Variety of Cost and Efficiency Benefits
Standard benefits of an IP PBX
Benefits of a centralized server architecture
Cost Savings
Inter-location calling on the data network
Long distance consolidation to central low cost T1 lines
Fewer analog trunks at each branch location
Branch office benefits
Integration of existing analog telephony devices onto the Succession 1000 network
Maintaining local connectivity for local calls and 911
Survivability if connectivity with the Succession 1000 is lost

23. John Akridge Companies Needed A Cost Effective Solution That Offered Flexibility
A full-service real estate firm with over M square feet of office, industrial, residential, retail and entertainment space .
Deployed a new IP phone system
Line growth at headquarters
Connectivity to its 18 managed sites
Construction trailers placed at job sites
Expand while preserving the investment in traditional PBX equipment.

24. John Akridge IP Telephony Network
Headquarters
Managed Buildings
bConvergent OpenVoice Servers
D2400
PSTN
A400/A800
Managed Buildings
IP NETWORK
D2400 T1
Construction Trailers
Polycom IP Phones
Existing PBX

25. Provided John Akridge Cost Benefits And The Ability To Quickly Expand Their System
Expanded the capacity and capability of their voice system while keeping the existing PBX.
Full feature set of the central site PBX at all branch office sites.
Decreased cost on inter-office calling.
Elimination of local telephone lines and key systems at construction trailers.
Survivable systems that assured they would have phone service.

26. Key Steps To Follow When Deploying IP Telephony In The Branch Office
Plan and evaluate for VoIP deployment
Assessment of the existing infrastructure
Evaluation of VoIP requirements
Upgrade the IP as required
Lay out the network
Run a pilot – Identify any issues
Full implementation

27. Maximize Existing Equipment Deploy in New and Replacement Scenarios
Summary
IP Telephony can successfully be deployed with voice quality at least as good at the PSTN.
Branch office IP Telephony offers cost and productivity benefits.
There are issues that need to be understood!
A variety of approaches allows you to start small and grow your IP telephony network.
Maximize Existing Equipment
Deploy in New and Replacement Scenarios
Mixed Approach
Uncertain
42%
18%
23%
17%
Source: Phillips Group InfoTech

28. Thank You!