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it_consultant wrote: » If you already have a digital cable plant then Avaya is the way to go since you can easily integrate the SIP phones without having different features available depending on whether you are digital or SIP. Nortel and NEC offer this too but the SIP phones have extra features that their digital phones don't. Obviously Cisco is all SIP so you wont be able to reuse the existing cable plant for digital phones if you have one. Remember that digital phones are much cheaper, so unless you are going over the WAN or something you normally don't actually need a SIP phone. I think gaining Avaya certs is not easy, but learning the equipment is, they are my preferred phone switch.
unclerico wrote: » I work with extreme switches and I am not a very big fan of them. Every last one of them will be replaced with Juniper or Cisco depending on the requirements.
it_consultant wrote: » When we say digital we are talking about phones that talk over a 4 pin cable plant (Over H.232 or whatever the protocol is) as opposed to a 2 pin analog plant. SIP phones run on the corporate ethernet. Digital phones (through Avaya) have all the same features of the IP phones except that they run on the 4 pin instead of ethernet. Using something like Avaya you can run all three technologies over the same phone switch depending on the cabling available. This is impossible on Cisco and harder to do on NECs etc. You can make your career on Avaya alone. Once you learn call routing logic and phone-tree's you will be a step above most of the pros I work with.
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