APPLICATION NOTE

Simple, Scalable and Secure Teleworking SolutionThe Mitel® Teleworker Solution now makes it possible for businesses of all sizes to

reap the benefits of teleworking: increased employee productivity, lower real estate costs,

higher employee retention, and more. This application note describes the Mitel Teleworker

Solution, its benefits and configuration requirements.

ApplicationThe Mitel Teleworker Solution is ideal for:• Companies with remote offices or home-based

employees that require access to the corporatenetwork and office phone system (including voicemail and conferencing)

• Day-extenders – employees who regularly takework home with them or whose jobs require theybe accessible outside regular business hours

• Companies looking to reduce real-estateexpenses

• Companies wishing to reduce absenteeism andimprove productivity levels

• Companies wanting to reduce long-distancecharges to and from remote offices

Mitel SolutionThe Mitel Teleworker Solution can be implementedquickly and easily using a wide range of standardMitel IP phones and any of the following platforms:Mitel 3300 IP Communications Platform (ICP) orMitel SX-200® IP Communications Platform (ICP).

To configure the solution, a system administratorsimply changes the Mitel IP Phone to TeleworkerSolution mode (a two-click process) and then usesthe keypad to enter the IP address of the TeleworkerSolution gateway. After the administrator adds theset’s ID to the approved list, a connection betweenthe Teleworker Solution phone and the gateway isquickly established, registering the phone as astandard extension off the office system – all in amatter of minutes. End-users can then take theTeleworker Solution phone off site and plug it intoany broadband Internet connection (residential DSL,cable or satellite) for access to all the features of theMitel IP phone without any special configuration atthe remote location.

MITEL

Teleworker Solution

410_1018-Teleworker_Soln_App_Note:Layout 1 1/7/08 2:12 PM Page 1

Additional FeaturesMultiple ICP support: in a network environment wheremultiple ICPs are deployed within the enterprise, onlyone Teleworker Solution gateway is required. Thisreduces capital costs and increases network simplicity.

Teleworker Solution, Release 4.0 and above supportsthe direct connection of the Mitel Your Assistant™

Softphone and Collaboration applications*. YourAssistant can now interconnect to the 3300 ICPthrough the Teleworker Solution server. For example,remote workers are now able to use Your Assistant orYour Assistant Softphone without the need of a VPNconnection back into the corporate office. Full YourAssistant functionality, including Softphone,collaboration, presence and availability, and ACDare all supported in a non-VPN environment.* Your Assistant, Release 3.2 or above is required.

Increased resiliency: in the event of primary 3300 ICPfailure, the Teleworker Solution will automatically failoverto a secondary 3300 ICP with no interruption in service.The Mitel Line Interface Module provides PSTN failovershould the link between the Teleworker Solution phoneand Teleworker Solution gateway fail. The Line InterfaceModule also enables a user to select a local analog linevia the Mitel 5224 IP Phone for local, emergency orpersonal outgoing calls. Incoming calls to this analogline can also be received via the 5224 IP Phone.

Video support: remote 5224 IP Phone usersare now able to simply and easily establish videoconferences by pushing a button on their TeleworkerSolution phone. This feature is available in conjunctionwith the VCON Media Exchange Manager (MXM)video conferencing solution.

Reporting: HTML reporting is provided, enabling thesystem administrator or IT manager to obtain importantand useful information on Teleworker Solution usage,this could be used to aid the provisioning of additionalteleworkers, monitoring bandwidth use at peak periodsor simply for cost analysis purposes.

Key BenefitsSimplicity: system administrators can simply andquickly configure multiple Teleworker Solution phones.Alternately, they can use an installer password toreduce the time needed for large installations. (Enteringthe installer password automatically adds the phone’sID to the list of allowable IDs.) End-users require notraining; they simply plug in a suitable Mitel IP phoneand start working.

Scalability: one Teleworker Solution gateway supportsup to 500 clients. Up to 128 simultaneous calls arepossible per 3300 ICP. The number of Teleworker Solutionusers can be increased easily and efficiently through thepurchase of additional license packs. Licenses areavailable in packs of 5, 25, 50 or 100. TeleworkerSolution gateways can also be daisy chained to allowone Teleworker Solution gateway to be connecteddirectly to another Teleworker Solution gateway. Thisconfiguration can be useful in larger, more complexnetwork environments when there might be oneTeleworker Solution gateway in the demilitarized zone(DMZ) and another being used internally, or forinstallations that require more than 500 teleworkers.

Security: the Teleworker Solution uses SecureReal-time Protocol with 128-bit AES encryption ofvoice connections and uses SSL to encrypt the callcontrol. For more information, please view the “Securityand the Mitel Teleworker Solution” white paper available on Mitel OnLine.

APPLICATION NOTE

2 MITEL APPLICATION NOTE TELEWORKER SOLUTION

410_1018-Teleworker_Soln_App_Note:Layout 1 1/7/08 2:12 PM Page 2

Flexibility: the Teleworker Solution uses a wide rangeof standard Mitel IP phones. Employees simply bringtheir phones home and plug them in, resulting inincreased flexibility and lower corporate costs.(Bandwidth requirements are kept to a minimum usingoptional G.729 transcoding.) Users also have the optionto add video to the call when talking with othercolleagues anywhere on the corporate network,simply by pressing a button on their 5224 IP Phone.

To increase enterprise efficiency, Teleworker Solutionphones can now stream voice conversations directly fromone Teleworker Solution phone to another without thevoice path going back to the Teleworker Solutiongateway, when the voice path is contained within aremote office location (point-to-point). The TeleworkerSolution gateway will support up to 20 IP phones behinda single NAT router. This is an ideal solution for remotebranch offices working over a small Internet link.

Configuration and SpecificationsThe following diagram shows two possibleconfigurations for the Teleworker Solution. In the first,the Teleworker Solution gateway is deployed in server-only mode and placed behind an existing corporatefirewall, and can therefore operate with existingfirewall protocols. In the second, the TeleworkerSolution gateway is deployed in server / gatewaymode and takes on the role of firewall and gatewayfor the Teleworker Solution connections.

It should be noted that when the Teleworker Solution isdeployed in server / gateway mode, the firewall shouldbe used for Teleworker Solution connections only and notused as the business firewall.

SX-200 ICP

3300 ICP

Home Router /NAT / Firewall

To Legacy SystemsVia Q.SIG DPNSS, PRI

Internet

Managed Application Server with Teleworker Solution

Operates as Teleworker Solution gateway in:a) Server only mode integrated with an existing firewall orb) Server / Gateway mode using the firewall facility in the MAS for Teleworker Solution connections.

Home / Remote Office

Mitel IP Phone

CorporateNetwork

Teleworker Solution – Configuration

TELEWORKER SOLUTION MITEL APPLICATION NOTE 3

410_1018-Teleworker_Soln_App_Note:Layout 1 1/7/08 2:12 PM Page 3

www.mitel.comTHIS DOCUMENT IS PROVIDED TO YOU FOR INFORMATIONAL PURPOSES ONLY. The information furnished in this document, believed by Mitel to be accurate as of the dateof its publication, is subject to change without notice. Mitel assumes no responsibility for any errors or omissions in this document and shall have no obligation to you as aresult of having made this document available to you or based upon the information it contains.

M MITEL (design) is a registered trademark of Mitel Networks Corporation. All other products and services are the registered trademarks of their respective holders.

© Copyright 2008, Mitel Networks Corporation. All Rights Reserved. GD 410_1018 PN 51005672RI-EN

For more information on our worldwide office locations, visit our website at www.mitel.com/offices

Global Headquarters

Tel: +1(613) 592-2122Fax: +1(613) 592-4784

Asia Pacific

Tel: +852 2508 9780Fax: +852 2508 9232

U.S.

Tel: +1(480) 961-9000Fax: +1(480) 961-1370

EMEA

Tel: +44(0)1291-430000Fax: +44(0)1291-430400

CALA

Tel: +1(613) 592-2122Fax: +1(613) 592-7825

410_1018-Teleworker_Soln_App_Note:Layout 1 1/7/08 2:12 PM Page ii