Avaya IP Office Configuration and Maintenance












Avaya IP Office Configuration and Maintenance exam questions
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answers to your VoIP questions

if you're significantly since making the voice-over-IP plunge, you little question have lots of questions starting from the technical to the fiscal to the political. half four of their convergence collection.

when you are critically for the reason that making the voice-over-IP plunge, you little question have a number of questions starting from the technical to the monetary to the political.

Can VoIP site visitors traverse firewalls? Can it in reality store us funds? what's the choicest solution to get IT and telecom staffs to work together?

In wrapping up their collection on convergence, they have taken a crack at answering just a few of those questions.

Can my LAN deal with VoIP?

IP telephony works most beneficial on LANs working switched 10/100M bit/sec Ethernet to the computing device and switched Gigabit Ethernet in the backbone. if you're nonetheless connecting computers with hubs, and also you need IP telephony, an improve is doubtless in order.

fine query is still for VoIPPart 1 of this seriesIs this a do-it-yourself assignment?part 2 of this seriesUsers hoping SIP's the answerPart three of this collection

Having LAN switches that guide first-class-of-service (QoS) technologies, reminiscent of 802.1p traffic prioritization, virtual LAN tagging or Differentiated capabilities, is also important. Many IP telephony providers build QoS into their equipment, so a community lacking QoS-enabled switches is also a candidate for an improve if IP telephony is your purpose - notwithstanding there are users who've QoS-ready switches and get by way of with out flicking the QoS switch, preferring to simply tolerate the occasional snaps and pops on the line.

Do I should throw out my PBX?

corporations corresponding to Cisco and 3Com, which have no normal PBX installed base, have pushed their consumers to make a wholesale swap from circuit-switched telephony to IP. Avaya, Siemens, Nortel, NEC and other sellers of typical PBXs offer IP playing cards for their programs as a method to "IP-enable" them. IP enabling a PBX lets consumers prolong their PBXs to department offices by means of IP WAN connections, and even to IP or digital telephones internal a corporate headquarters.

what's the voice satisfactory like?

It may also be pretty much as good or improved than regular voice pleasant. but high-quality is in the ear of the beholder, so the answer depends upon how discriminating your enterprise's conclusion users are. Some businesses do not agonize a lot concerning the great of VoIP for definite inside calls. but when the calls are involved directly with income technology, agencies customarily have a better normal.

if you want to measure the high-quality of a VoIP name, there are strategies, including the MedianOpinion ranking (MOS) verify, endorsed by using the overseas Telecommunications Union (ITU). MOS involves gathering people into a room to hearken to calls, after which community members rate nice on a scale from 1 to 5. Voice-first-rate testing equipment in accordance with computer algorithms are also purchasable from vendors corresponding to Agilent and Empirix.

Is VoIP in fact much less costly?

You can make an excellent case for it, but it surely's challenging to provide a blanket reply. Theoretically you can cast off some telephone trunks in case you use a single community for all site visitors. that you could avoid costly toll prices, exceptionally for foreign calls. which you can reduce the executive can charge of moving phones when a person changes offices or someone is employed or fired. You might get by way of with fewer employees if you merge records and telecom staffs. however you have to aspect in the cost of recent equipment, improved site visitors in your statistics community that can require greater, more high priced links to carrier suppliers and higher-priced functions in line with stringent service-level agreements that voice requires. Some users worry that because VoIP is relatively new, software updates should be greater standard than with usual PBXs, making the maintenance of IP PBXs more expensive. You should crunch your personal numbers and examine no matter if it makes feel for you.

If the vigor goes out, does the VoIP community live up?

within the natural voice world, telephones are powered by the PBX, which is always powered by using a returned-up energy source, which can preserve the device through most outages. working voice over a LAN introduces greater contraptions into the voice community equation - and that capability there are greater aspects alongside the community that will also be affected by an outage and create mobile service problems.

One safety measure to take is to put lower back-up vigour supplies on all LAN switches that connect IP phones and IP PBXs. Most important to ensuring cellphone connectivity in an outage, youngsters, is to make sure telephones are powered over their community connections. companies similar to Avaya, Cisco and Nortel promote Ethernet switches that can bring electrical vigor along with Ethernet LAN connectivity.

What happens to VoIP if the network fails?

In VoIP deployments the place a centralized IP PBX controls remote-workplace telephones, the WAN connection is a voice and records lifeline. If the hyperlink goes down, dial tone in addition to web and network access will also be lost. Some companies include technology of their routers or far off gateways that lets faraway IP mobilephone users to proceed making mobilephone calls via a again-up T-1 or ISDN line if the leading links to a significant IP PBX are lost.

Do I should purchase particular telephones?

in case you do VoIP to the computing device you want IP phones, and not simply any IP telephones. however all LAN telephony apparatus is Ethernet-primarily based, it does not yet offer the same stage of interoperability as Ethernet laptop networking. here is because most companies have proprietary protocols and software operating on their telephones and call servers that don't work with those in others' products. Some IP telephone systems aid requisites protocols comparable to H.323, Session Initiation Protocol (SIP) and Media Gateway control Protocol. This lets clients purchase commodity IP phones from vendors such as Pingtel, Polycom and image applied sciences.

Many providers even have gateways that permit analog or digital sets for use on their IP-primarily based call servers.

What protocol do i use?

The option now is between the tried-and- real and the cutting edge. H.323 products can be found, strong and deployed. SIP holds promise for new and more dynamic applications, however has not been put through the paces in many corporate networks.

What cool new capabilities do they get?

Tops on the listing is unified messaging. Most VoIP gear makers have crafted products that allow conclusion clients study electronic mail and hearken to voice mail from a single in-container, built-in with functions akin to Microsoft change and IBM's Lotus Notes.

Telecommuters are making the most of IP telephony additionally. workers with home VPN connections and IP phones (or workstation-based mostly "softphones") can lengthen their 4-digit extensions to the home office.

Many IP phones are getting greater like skinny IP valued clientele than phones. Many include liquid crystal display shows that permit users interface with internet-primarily based applications and even surf the internet. Some users enabled IP phones to faucet into back-conclusion XML or Java software servers.

How secure is VoIP?

VoIP apparatus is in response to servers which are as vulnerable to assaults as any others. they are prone to viruses, so an everyday routine of updates and patches is required. lots of these gadgets have web-based mostly management, which additionally need to be monitored and remedied for bugs and vulnerabilities.

isn't it complicated to get IP voice through a firewall?

yes, but this can be worked out. until each mobilephone at a site has a public IP address, the firewall will exchange the source IP tackle as packets circulate from the mobilephone and out onto the WAN IP hyperlink. however the firewall best does this within the headers, now not on internal constituents of the packet. When IP cell gear picks up that the source addresses in diverse parts of the identical packets do not healthy, it drops the packets. Firewalls and firewall add-ons are being developed as a way to take care of this difficulty, nevertheless it's some thing you need to learn about and deal with. an additional firewall issue is that because they are designed to hold out all however authorized site visitors, they would hold out official inbound cellphone calls as neatly. A port can be left open as a gap in which to provoke such calls, but your protection consultants could no longer like that. New equipment known as session controllers set up persistent connections from outside firewalls to IP phones interior firewalls to create a extra relaxed hole for inbound calls.

If i'm working voice on what was prior to now just a knowledge network, what becomes of my telecom workforce?

this is a tricky one. Some IT executives who propose transitions to IP voice cite the cost discounts their agencies will adventure by using laying off the telecom workforce. so as to store their jobs, the telecom group of workers individuals regularly reply through attacking the viability of IP voice to be able to postpone the tasks. a hit transitions have blanketed a awareness of this conflict and handled it. In some circumstances, pass-practicing IT and telecom team of workers has resulted in a great deal greater mobile and facts service. This merging of staff may no longer be viable in all circumstances, but it surely executives should still anticipate that the conflict will come up and plan for the way to take care of it.

What happens to QoS after I flow traffic off to my carrier provider?

It might go appropriate out the window except you're making preparations together with your provider. You deserve to let the provider recognize that you are transporting voice to its network and ask how the provider can assure the traffic will get precedence remedy.

The service could have a community that uses the same priority markers you use to your LAN or might be in a position to map your precedence scheme into its precedence scheme. The skill will seemingly charge you further, however the service should include measurable provider-degree ensures to provide you with some diploma of comfort that voice may be handled smartly.

Does 911 nonetheless work?

It had superior. The technology exists so that when an end consumer takes his phone and strikes it to a further office, the 911 device is aware of about the new location, and emergency personnel can find the grownup. counting on whose equipment you purchase, updating the place database may require guide entries or it might restrict the variety of times a phone can also be moved per day.

be trained more about this topicnice question is still for VoIP

half 1 of this series

is this a home made assignment?

part 2

clients hoping SIP's the answer

half three.

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