Getting a Quote for a Business Phone System: What to Ask For

2026-11-05　　Views:

A phone system quote is easy to produce and hard to compare, because two quotes for the same business rarely cover the same thing. One includes the licences and the install, another includes the handsets but not the trunk, a third prices the hardware at a discount that requires a multi-year commitment nobody mentioned in the meeting. Getting a useful quote means specifying the scope yourself rather than letting each supplier describe their own package.

Write the requirement before you request the price

The single biggest reason quotes cannot be compared is that each supplier was answering a different question. Before asking anyone for a number, write down what you need in your own terms. This is not a technical document — it is a list that stops the quote drifting toward whatever that supplier sells well.

A workable version is short:

How many extensions now, and how many in two years
How many concurrent calls you expect at the busiest point
How many simultaneous outbound calls during campaigns
How many existing phone numbers to keep
How many analogue devices will remain, and what they are
How many sites, and whether each must keep working if the WAN fails
Whether calls need to be recorded, and for which lines
Which existing systems must integrate — directory, CRM, booking system

That list is enough to get comparable quotes, and it is what the IP-PBX buying guide builds on with the full question set.

Ask for the quote broken into line items

A single total tells you nothing. Ask for a breakdown, and specify the categories you want to see separately. These are the ones that matter:

Line item	What to specify	Why it is separate
Hardware	Model and quantity, plus what is included	Model choice determines capacity limits
Software licences	What is licensed, how many, and for how long	Often the recurring cost that is forgotten
Trunks / channels	Initial quantity and the cost of adding more	Usually recurring, and often the largest line
Handsets	Quantity, model, and whether they are included	Bigger than expected in most first quotes
Installation	Scope, who does it, and what it includes	Varies enormously in what is inside
Maintenance and support	What is covered and the response commitment	Recurring, and different tiers cost different amounts
Number porting	Whether it is included and who does it	Often excluded
Training and documentation	Who is trained and what they get	Frequently assumed and frequently absent

The row that causes the most trouble later is usually the one for what happens after year one. Ask specifically for the recurring monthly or annual figure, with everything itemised, so that two proposals can be compared on the same basis.

Ask the questions that reveal what is not in the price

Some costs do not appear on a quote because they only arise in particular circumstances. Ask about them directly:

What happens to the price if we exceed the concurrent call or channel count — is there a per-call charge, a per-channel charge, or a licence tier
What is the charge for adding an extension after go-live
What is the charge for a support call, and what is included in the maintenance tier
What happens to the subscription if we reduce the number of extensions mid-term
Is there a minimum term, and what is the early termination position
What are the recurring charges from the carrier as opposed to from you

Question one is the most important, because consumption-based voice billing is common and it can move the cost structure significantly. The IP-PBX cost guide covers the line items organisations most often discover late.

Compare on the same basis

When you have several quotes, normalise them before comparing. Convert everything to the same period. Separate one-off from recurring. Note what each quote assumes about who does the work — if two suppliers price the same scope differently because one includes configuration and the other does not, the comparison is meaningless until you adjust it.

Then look for what is missing rather than what is present. A quote that is obviously cheaper is often cheaper because it excludes the things you did not know to ask about.

Decide what you are optimising for

There is no single cheapest option, only a cheapest option for a particular priority. Some organisations optimise for the lowest total cost over five years, some for the least disruption to change, some for the shortest support response time, and some for the smallest number of vendors to deal with.

Say which one you are optimising for when you request the quote, because it changes what a good answer looks like. A supplier optimising for low total cost will propose a different structure from one optimising for a smooth migration, and both are being reasonable.

Validate the model against your requirement

Whatever the quote says, check the model's published limits against your requirement — users, IP extensions, trunks, built-in FXS/FXO ports and concurrent calls are separate ceilings. The OM series model comparison lists them per model. This check takes two minutes and it catches the case where a quote is technically fine but the model is at its limit on day one.

A quote that will not separate one-off cost from recurring cost is not a quote. It is a first page, and it is not a number you can put in a budget.

Frequently asked questions

How much should a business phone system cost?

It depends on extension count, concurrent call load, hardware, licences and recurring charges, so a single number would be misleading. What is worth doing is getting quotes that separate one-off from recurring, then comparing the same scope across suppliers.

Are hidden costs really a problem?

They are common, and they come from a predictable set of places: consumption-based calling charges, adding extensions later, support outside the maintenance tier, early termination, and carrier charges that the supplier does not control but is still easiest for you to deal with.

Should I ask for a three-year total?

Yes, if the quote is monthly or annual. It surfaces the recurring-versus-one-off distinction immediately and it stops a cheap first year being compared against a complete one.

Is a subscription better than buying the hardware?

It depends on how the organisation treats the system. Subscriptions reduce the upfront cost and shift the refresh cycle to the vendor, but they lock in a recurring relationship and make exit a negotiation. Purchasing puts the refresh decision in your hands and makes exit cheaper.

Conclusion

A comparable quote comes from a clear requirement and a structured request, not from more suppliers. Write down what you need, ask every supplier for the same eight line items, ask the questions about what happens after year one, and normalise before comparing. Then check the model's published capacity limits against the requirement. With that groundwork, the quotes become a decision rather than a set of incomparable numbers.

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