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Test Code : 920-249
Test appellation : Nortel Application Switch Rls.23.xConfig and Admin
Vendor appellation : Nortel
real questions : 68 real Questions

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Nortel Application Switch Rls.23.xConfig and Admin book

Nortel leads the route in VoIP functions that support teleworkers | 920-249 real Questions and VCE exercise Test

during this examine they compared the telework offerings of five main IP telephony providers - Alcatel, Avaya, Cisco, Mitel Networks and Nortel - below real-world IP WAN situations.

IP telephony is extending new facets and capabilities to cellular employees and highway warriors, and revolutionizing the style teleworkers unite and work with their counterparts again within the office.

during this verify they in comparison the telework offerings of five leading IP telephony providers beneath real-world IP WAN conditions. They discovered that the seller packages - from Alcatel, Avaya, Cisco, Mitel Networks and Nortel - vary of their protection infrastructure; counseled machine; breadth of latest functions and features; expense; and fine of voice communications.

How they did it

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Kudos to Nortel, the network World Blue Ribbon winner with its MCS 5100 - a new SIP-based IP PBX and purposes platform. Nortel earns towering grades for its collaboration elements, together with videoconferencing, speedily messaging, whiteboarding and web co-looking.

Avaya and Mitel additionally scored well. while neither provided as wealthy an application package as Nortel, Avaya's teleworker kit delivers incredible appellation routing and mobility elements, whereas Mitel's computer utility protected fabulous call-handling capabilities. They also gave Cisco towering marks for its call-routing capabilities.

We defined their overview standards in four time-honored areas (see scorecard, below).

•  Telephony facets and collaboration facets.•  complicated mobilephone and soft cellphone efficiency.•  Configuration, integration of accessories, setup and monitoring of teleworker connections.•  security provisions for shielding the teleworker's IP connections.

in this check, each and every dealer first needed to installation a complete working IP PBX in their lab. Then they needed to installation anything remote-web page gadget and utility they advocate and present for telecommuters. A Cisco IOS-primarily based router infrastructure linked the enterprise IP PBX LAN with the "remote" teleworker web site, simulating connectivity via one or greater ISPs. a several simulation equipment, from PacketStorm, utilized consistent WAN impairments to perfect passing voice-over-IP (VoIP) site visitors. (See How they did it).

function rich

What facets reliance to a teleworker? They determined anything that enhances productiveness, lessens the physical remoteness of the teleworker, or enables closer communications and collaboration with fellow workers back at the workplace become an outstanding candidate.

Nortel's Multimedia computing device client, with an necessary portion called the own Agent, addressed perfect these areas. Presence - where the true-time status of workgroup or department members are propagated to perfect different contributors - is well implemented and beneficial. different first-class features are muster routing, which lets you define quite a lot of name-managing responses in response to elements including who is looking, videoconferencing, instant messaging and whiteboarding. there's even "web-push co-looking," the location dissimilar far off clients can similtaneously browse the very net sites.

The Avaya points, included within the $one hundred fifty-per-computing device Mobility kit, encompass a tender phone and routing features that connect and switch calls to the teleworker's cell and residential telephones. there is also IM and a several characteristic that integrates phone numbers embedded in net pages with the soft mobile, so you can click on on and dial any telephone quantity you see whereas browsing the net. other well-finished, advantageous points include the six-birthday celebration audioconferencing and integration of the Avaya applications on the laptop with Microsoft Outlook.

Mitel's Your aide software provides a more-modest role set, however Mitel is continually adding extra to the equipment. They were impressed with the name-routing capabilities; muster logs and click-on dialing; dynamic audioconferencing of up to eight parties; and the brief list of shut friends, which allows you to import contacts from Outlook. The application is well prepared, intuitive and customizable.

Cisco's elements are disbursed over a number of disparate applications, including the fine mobilephone and the Cisco very own Assistant. there is additionally access to the seller's solidarity unified-message reclaim by means of the net interface. solidarity offers a textual content-to-speech means for retrieving electronic mail with the aid of telephone. Cisco's muster routing is among the richest of the entire companies reviewed, featuring the broadest set of rules-based appellation handling. as an instance, that you would exist able to absorb your calls depart to voice mail within the morning after which despatched to your cellphone in the afternoon. there is also a noteworthy own address booklet tied into cell features.

Alcatel says it has a yoke of new messaging and collaboration applications coming out early next yr. but for now, they confirmed the features of its tender telephone equipment, OmniTouch MyPhone. The software lets the teleworker intently associate his IP gentle telephone with other public switched mobilephone network (PSTN) connections, including cell. An spectacular role is the potential to current a live muster from the IP connection to a PSTN cell if IP appellation pleasant degrades.

VoIP efficiency

As lots of the teleworker calls they tested used commonplace vocoders and VPN tunnels, the per-VoIP-call WAN bandwidth consumption became similar throughout the board. as an instance, with the overhead of the VPN tunnel included, a benchmark G.711 muster took about 105K bit/sec in every course. A compressed G.729 name, additionally via a VPN tunnel, took about 46K bit/sec.

The exception was Mitel, which does not raise its IP tough mobilephone precise-Time Protocol (RTP) streams in a VPN tunnel. The VoIP connection is authenticated and the RTP streams encrypted, but devoid of the VPN overhead bandwidth drops essentially 20%.

call excellent numerous significantly in some situations. Avaya's less-expensive IP phones, the 4602, priced at $195, delivered poor-to-fair muster trait with compressed G.729 vocoding. muster fine with Avaya model 4620 IP phones, twice the fee of the 4602, consistently yielded first rate calls. Avaya says both cell fashions set in coerce vocoding algorithms in a different way, which is not typically the case with VoIP items from the identical seller.

The soft-cell appellation nice become generally worse than with tough telephones. The mediocre headset they used for perfect their tender mobilephone calls minute doubt contributed to this outcomes, however they recommend readers to accept as suitable with providing their teleworkers the altenative of an IP hard cell, too, in spite of the fact that they might expend a smooth cell.

Nortel had the most profitable tender-phone muster excellent, with decent-to-surprising ratings for both G.729 and G.711. Avaya's turned into top-notch to striking with G.729, but best reasonable with G.711, which was impressive. Alcatel's soft cell yielded fair-to-first rate appellation high-quality with G.711 and negative-to-fair for G.729. Cisco's smooth-cell muster pleasant turned into poverty-stricken with G.729, but impartial with G.711. Mitel presents a tender telephone for teleworkers, however wanted us to check with just its IP hard telephone at the teleworker web site.

IP tough-mobilephone muster nice, in most cases, became respectable to staggering. In Mitel's case, they rated IP tough mobilephone appellation high-quality as top-notch with G.711, however perceptibly stronger, top-notch to dazzling, with G.729. Nortel's hard phones yielded good-to-mind-blowing muster first-class in perfect instances, as did Cisco's.

Teleworking through tunnels

We required providers to install the security infrastructure they recommend to customers who should support teleworkers. IP protection (IPSec)-based mostly VPN tunnels were the alternative in perfect instances. Mitel used VPN tunnels best for computing device connections; the VoIP streams of its IP hard cell didn't commute through VPN tunnels. Cisco and Avaya deployed VPN client bins on the telecommuter website. These devices - a mannequin 831 IOS-based cozy Router in Cisco's case and SG5X secure Gateway in Avaya's case - consist of a multi-port swap, role encryption and authentication for a yoke of concurrent VPN tunnels, in addition to community manipulate translation, Dynamic Host Configuration Protocol, IP routing and, to a consumer-defined extent, firewall processing.

Alcatel recommends IPSec-based mostly VPN tunnels, however does not present its own VPN gadget. as a substitute, Alcatel certifies that its VoIP outfit and OmniPCX will work over certain third-birthday party VPN programs. since the vendor failed to deliver any VPN apparatus, they tried a low-conclusion Linksys IPSec-primarily based kit under Alcatel's teleworker VoIP connection. The Linksys VPN apparatus wasn't on Alcatel's listing of licensed VPN hardware, nevertheless it labored fine.

In Mitel's case, a locality of expertise Linux-based server on the enterprise community, called the 6010 Teleworker answer, handles perfect protection and compression (G.729 vocoder) processing for as much as 500 teleworker connections. a laptop at the teleworker web page runs the teleworker purposes and connects via a VPN tunnel the expend of the autochthonous Microsoft VPN client software, which sets up a extra-or-much less IPSec-primarily based Layer 2 Tunneling Protocol relaxed VPN tunnel.

Mitel's IP difficult phone sets up an authenticated and encrypted connection from the teleworker to the 6010 server. It isn't a VPN tunnel, even though, so it avoids the delivered bandwidth consumed via VPN overhead. With its decrease bandwidth and generally better VoIP voice satisfactory - as most effective its IP challenging telephones were validated - Mitel garnered a exorbitant efficiency score.

Nortel's notebook utility is multifaceted and well engineered. Nortel's VPN client utility, which comes free as a component of its Contivity VPN hardware kit, handles perfect safety processing for each the computing device with gentle telephone and an not obligatory, attached IP challenging telephone, in location of having a VPN container tackle it. moreover the smooth mobilephone, Nortel's computer software equipment, called the Multimedia computer client v2.0, also includes the smarts to deal with SIP endpoint muster processing.

So perfect there's at the Nortel telecommuter website is the computer - working perfect of Nortel's customer software and smooth cell. If now not plugged into the WAN hyperlink (via cable or DSL modem, and many others.), the computer can exist plugged into the change port of the not obligatory IP tough mobilephone. In either case, perfect site visitors between the teleworker website and the enterprise network is included during the Contivity VPN tunnel.

The programs verified might perfect efficaciously deploy their safety and teleworker VoIP connections over the Cisco router infrastructure.

Configuration concerns

in the configuration category they considered the difficult and smooth mobilephone alternate options, the mixing of the components, and the setup and monitoring of teleworker connections. while there became some variety, ordinary they rated perfect of the vendors on the equal stage during this category.

We did not verify Alcatel's teleworker configuration with a hard cell, but the dealer does support a tough cell and fine phone aggregate. Alcatel's ranking here became compensated by astonishing setup wizards for its tender cellphone, which assures top of the line sound and voice quality.

The capability to tune Avaya's gentle telephone for optimizing appellation exceptional is additionally noteworthy. The administrator and the teleworker can conveniently modify vocoders, even adjust gain hold of and transmit gain (quantity) levels. Avaya, too, lets the teleworker closely affiliate the IP tender mobilephone with an IP complicated telephone, home mobile or cell. The teleworker can retrieve some rudimentary precise-time pleasant-of-provider (QoS) records from the tender mobilephone, too.

Cisco these days revamped its soft phone constitution, going from the outdated TAPI-based mostly utility to new code that directly interacts by means of the Cisco "skinny" call-manage protocol, formally referred to as SCCP. Some alterations are certainly still necessary, as a result of Cisco's soft mobilephone appellation trait wants work. Cisco's IP challenging mobilephone efficiency remains stellar, however. Cisco's wealth of safety alternatives, and its bandwidth management and QoS elements are extra huge than its IP-telephony competitors. but perfect that functionality leaves clients with a lot of items to manage and various interfaces during which to upshot it.

Nortel's smartly-structured pc application includes the video coder/decoder, and the bandwidth required for the video factor turned into in the latitude of 40K to 80K bit/sec. With the very respectable soft-mobile muster satisfactory, an IP tough telephone at a teleworker web site can exist useless, although it nonetheless offers improved connection fine.

Mitel failed to supply its gentle telephone for this evaluate, but the dealer does present a edition of its Your aide utility that comprises a fine telephone. A plus for Mitel in this category is its Teleworker community Analyzer, a little home windows application designed to exist e-mailed to teleworkers from the administrator. The applet effectively installs, launches a simulated VoIP session lower back to headquarters and then shows perfect QoS and connection details.


The main IP-PBX providers perfect absorb a narrative to betray for extending VoIP out to teleworkers. however their on-web page teleworker applications vary considerably in machine and configuration, function, cost and relative appellation best. delicate-telephone appellation best became most profitable with Nortel, adopted via Avaya, Alcatel and Cisco. IP tough cell muster high-quality generally became more suitable and extra constant throughout the board, al-though there absorb been considerable transformations with both vocoders they established and between Avaya's diverse IP-challenging telephone models.

Avaya and Cisco, choose a multi-port VPN container on the teleworker web page, while Nortel and Mitel employed workstation-based VPN customer software in their trying out. in any other case, the entire vendors endorse and support IPSec-based VPN tunnels for securing teleworker-to-headquarters VoIP connections.

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