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: 68 true Questions
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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 connect and travail 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 elevated grades for its collaboration elements, together with videoconferencing, lickety-split 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 name routing and mobility elements, whereas Mitel's computer utility protected fabulous call-handling capabilities. They likewise gave Cisco elevated 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 replete 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 everyone passing voice-over-IP (VoIP) site visitors. (See How they did it).function rich
What facets rely 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 fraction called the own Agent, addressed everyone these areas. Presence - where the true-time status of workgroup or department members are propagated to everyone 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 situation dissimilar far off clients can similtaneously browse the selfsame 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 likewise 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 notice whereas browsing the net. other well-finished, advantageous points comprise 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 redeem 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 name handling. as an instance, that you would live able to hold your calls vanish to voice mail within the morning after which despatched to your cellphone in the afternoon. there is likewise a noteworthy own address booklet tied into cell features.
Alcatel says it has a pair 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 tide a live muster from the IP connection to a PSTN cell if IP name 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 quality 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 attach in obligate vocoding algorithms in a different way, which is not typically the case with VoIP items from the identical seller.
The soft-cell name nice become generally worse than with tough telephones. The mediocre headset they used for everyone their tender mobilephone calls petite doubt contributed to this outcomes, however they recommend readers to accept as proper with providing their teleworkers the selection of an IP arduous cell, too, in spite of the fact that they might exercise a smooth cell.
Nortel had the most advantageous tender-phone muster excellent, with decent-to-surprising ratings for both G.729 and G.711. Avaya's turned into fine to striking with G.729, but best reasonable with G.711, which was impressive. Alcatel's soft cell yielded fair-to-first rate name high-quality with G.711 and negative-to-fair for G.729. Cisco's smooth-cell muster pleasant turned into poor with G.729, but unbiased with G.711. Mitel presents a tender telephone for teleworkers, however wanted us to check with just its IP arduous 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 name high-quality as fine with G.711, however perceptibly stronger, fine to dazzling, with G.729. Nortel's arduous phones yielded good-to-mind-blowing muster first-class in everyone instances, as did Cisco's.Teleworking through tunnels
We required providers to install the security infrastructure they recommend to customers who should uphold teleworkers. IP protection (IPSec)-based mostly VPN tunnels were the alternative in everyone instances. Mitel used VPN tunnels best for computing device connections; the VoIP streams of its IP arduous 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 pair of concurrent VPN tunnels, in addition to community handle 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 materiel and OmniPCX will travail 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 everyone 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 exercise of the endemic 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 subside bandwidth and generally better VoIP voice satisfactory - as most effective its IP challenging telephones were validated - Mitel garnered a excessive 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 everyone safety processing for each the computing device with gentle telephone and an not obligatory, attached IP challenging telephone, in situation of having a VPN container tackle it. moreover the smooth mobilephone, Nortel's computer software equipment, called the Multimedia computer client v2.0, likewise includes the smarts to deal with SIP endpoint muster processing.
So everyone there's at the Nortel telecommuter website is the computer - working everyone 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 live plugged into the change port of the not obligatory IP tough mobilephone. In either case, everyone site visitors between the teleworker website and the enterprise network is included during the Contivity VPN tunnel.
The programs verified might everyone 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 everyone of the vendors on the equal stage during this category.
We did not verify Alcatel's teleworker configuration with a arduous cell, but the dealer does uphold 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 name exceptional is additionally noteworthy. The administrator and the teleworker can conveniently modify vocoders, even adjust win 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 soundless necessary, as a result of Cisco's soft mobilephone name quality 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 everyone that functionality leaves clients with a lot of items to manage and various interfaces during which to accomplish 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 live 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 minuscule home windows application designed to live e-mailed to teleworkers from the administrator. The applet effectively installs, launches a simulated VoIP session lower back to headquarters and then shows everyone QoS and connection details.Conclusion
The main IP-PBX providers everyone hold a narrative to narrate for extending VoIP out to teleworkers. however their on-web page teleworker applications vary considerably in machine and configuration, function, price and relative name best. delicate-telephone name best became most advantageous 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 hold been considerable transformations with both vocoders they established and between Avaya's diverse IP-challenging telephone models.
Avaya and Cisco, select 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 uphold IPSec-based VPN tunnels for securing teleworker-to-headquarters VoIP connections.
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