Getting an accurate phone system quote is a process that requires some in-depth knowledge. Because communication networks are precise things that require tight configuration, the company needs to have everything out on the table for the installer before getting started. Every job is different, and these subtle factors can alter the estimate quite a bit, so every answered question counts.
For one, a company needs to be able to tell the installer why they need a new setup in the first place. If difficulties with existing technology are the reason for the switch, then being able to target these issues for the installer will go a long way to narrowing down the equipment that will be needed. In addition, the business will need to have a solid idea of short range internal growth before getting a phone system quote. This is because some setups are better at scaling than others, and outgrowing a network shortly after it is installed will gouge the business unnecessarily. This will also determine whether an installer will push for a PBX or VoIP product, as the former is excellent at handling medium-sized companies, while the latter can easily deal with hundreds of employees at once.
The installer will also prefer to know what kind of equipment is already in place at the company. If the technology in place is still pretty current, it may be able to be assimilated into the new network, which would save some money.
It is possible to get a pretty accurate estimate over the phone now, and this should be done instead of looking for prices online as they can be too vague. Because there are many things that must be weighed in, speaking to a live person about it will produce the most thorough results.