Is VoIP the Right Match for You? Dave Tainer Director, Information Systems, GMHC August 13, 2008

Is VoIP the Right Match for You?Is VoIP the Right Match for You?

Dave TainerDave TainerDirector, Information Systems, GMHCDirector, Information Systems, GMHCAugust 13, 2008August 13, 2008

© 2008 Dave Tainer | GMHC All Rights Reserved.

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What will we talk about today?What will we talk about today?

• Voice over IP is a technology whose time has come. We have been, for at least the last few years, at the convergence point where the promises of the technology have met the reality. If done correctly, the system will be secure, easy to manage, reliable, and very cost-effective. It is not an easy task to project manage and bring to completion, but it is well worth it to try for the social profit sector

http://illumi-technorati.blogspot.com/2008/05/its-social-profit-not-non-profit-part-i.html

Why VoIP?Why VoIP?


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Why VoIPWhy VoIP??

• Does it make sense for your organization?• Cost! (capital vs. budget) • Unified Communications

– This is also called “convergence”: where you will be able to be reached by anybody with the ability to know “how” you can be reached

• Concept of “presence”– Cisco calls it “TelePresence”– Microsoft just calls it “presence”

• Chat, TXT, mobile phone, desktop VoIP phone, WiFi VoIP phone, videophone, etc.

– Ties in to other technologies such as SharePoint


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Why VoIPWhy VoIP? Cost!? Cost!

• Cost! – Capital vs. Budget

• A one-time purchase that you make that allows amortization over several years (telecom is usually a 7- or 10-year schedule)

– Overall cost • Cost of repairing old system (budget, usually)• Cost of being down• Monthly cost of the provider and calls made/received

– Current Network Infrastructure upgrade…• This is more cost, but should also be in the capital budget


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Why VoIPWhy VoIP? Cost!? Cost!

Telecom Cost: Real World Example

$15,000

$9,000

$0

$0

$85,000

$89,000

$48,000

$49,000

$1,800

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$0

$0

Year 1

Year 2

VoIP 1

VoIP 2

Maintenance Monthly Bill Equipment

Getting Ready for VoIPGetting Ready for VoIP


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• Infrastructure!!! • Current T1/DSL, etc. connections • QoS—what does it mean?

– “Quality of Service” is the end result, but the term is actually a reference to being able to provide different priority to different types of network traffic. In this case, it is VoIP traffic

– The floor, or first layer, of the network is reserved for the highest priority in VoIP

– This could also be used for video-conferencing and other types of streaming, if that is important to the organization

– QoS simply gives voice the priority so that there is no breakup to the packets of voice data, which would result in high latency, clipped and distorted speech, and continuity to what is spoken/heard


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Getting Ready for VoIP: QoSGetting Ready for VoIP: QoS

VoIP SMTP HTTP FTP


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• Planning for implementation – Like much in IS, there is no one-size-fits-all solution, however…– How many data ports at each workstation?

• Phones with switches? • Separate ethernet to workstation and VoIP phone (Speed/flexibility)

– Fax lines– Analog lines for credit cards, social security processing or other– WiFi VoIP Phones?– Lining up the providers – Active Directory up-to-date and properly set up

• And LDAP directory if not using Cisco or WinX (even if, for that matter…)– SIP trunking or PRI Gateway


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• SIP Trunking – Session Initiated Protocol– Basically an indirect connection to a telecom trunk via the cloud– Why you would use it?

• Cheapest phone rate• Great WAN capabilities• Only 1 (or two) T1 needed for data and telecom• Maximum VoIP phone compatibility

– Why you wouldn’t use it?• Security

– DoS attack-prone• Echo and Latency• Old/Outdated network infrastructure• Security

– Malware threat


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• PRI– Primary Rate Interface– 24 lines at T1 speed, built in QoS– Why would you use this?

• Separation of data path with telecom path• Security

– No DoS on PRIs– Not associated to your domain name

• VoIP on PRI is still cheaper than PBX on PRI• Organizational Size (multiple options, though, discuss…)

– Why you wouldn’t use this:• Expense of maintaining separate functional T1 (also an advantage)• Added network/network infrastructure complexity


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Getting Ready for VoIP: Security IssuesGetting Ready for VoIP: Security Issues

• Security details:– Most secure system is costly and not as easy to unify (separate network)

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POWER STATUS ACTIVE VPN FLASH

Adaptive Security Appliance

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Alternate VoIP Install: Separate Network (Reduntant T-1, SIP or PRI)


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• Security details:– Most cost effective system is easier integrate for unified communication between Active

Directory/LDAP and VoIP in Multi-VLAN environment

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WS-X4548-GB-RJ45V

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SWITCHING MODULE

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Typical VoIP Install: QoS over Multi-VLAN Network (Reduntant T-1, SIP)


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• Security details:– Best Practice system mixes security of PRI, in a separate domain, but allows unified

communication via AD/LDAP in Multi-VLAN environment

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WS-X4548-GB-RJ45V

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SWITCHING MODULE

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IN-LINE POWER

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WS-X4548-GB-RJ45V

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SWITCHING MODULE

48-PORT10/100/1000 BASE T

IN-LINE POWER

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PWR

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CONSOLE

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OPTIONAL RPS INPUT

12V - - - ___

18A


Cisco 2800 Series

PWR

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SYS 1

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18A

CISCO ASA 5510



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CISCO ASA 5510



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CISCO ASA 5510



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CORE EDGE

Best Practice VoIP Install: QoS over Multi-VLAN Network (Reduntant T-1, PRI)


Cisco 2800 Series

PWR

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CONSOLE

AUX

SYS 1

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100-240V ~ 3A50/60Hz

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18A


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Internet

Telecom (PRI)

The VendorsThe Vendors


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VoIP VendorsVoIP Vendors

• Follow the phone… – Pluses and minuses of the different brands

• Cisco, Nortel, 3Com, Foundry, Enterasys-Siemens, others (PolyCom OEM) – Pick one, and use all of their equipment together

• If you only listen to one thing I’ve said today, make it this one! • Use Platinum Vendors

– In-house vs. VoIP consultant • Depends on staffing and expertise, and to some extent, money

Endgame for VoIP SystemsEndgame for VoIP Systems


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EndgameEndgame

• Plugging everything in and getting ready to go live – Parallel systems for at least two weeks

• Start with one department, then keep adding as you see the system working

– It will cost more, and be a pain to the staff because they will have to maintain two voice mails, but you’ll be glad you did it

• Switchover to the new system – Hopefully after a succesful parallel run, you won’t just be crossing

your fingers!• Successful Implementation

– ROI is the best selling point to senior management for this– Keep track of costs going forward and compare to the previous year/s

Documents

Is VoIP the Right Match for You? Dave Tainer Director, Information Systems, GMHC August 13, 2008