Imagine a business uses an old phone system. Its calls often fail, and to make repairs, it costs money. So, the owner now wants a better system. But the owner worries that changing it could cause the business to lose its phone numbers.
When you are selling UCaaS, find out what problems the business has. Then explain to them how much the new system costs and how to change systems without stopping calls. This guide explains how to sell UCaaS to small and midsize businesses, from telecom lead generation to planning a smooth migration.
Which Legacy Phone System Businesses Should You Target First?
You should target small and midsize businesses that use old phone systems. It’s better if the small businesses that are growing or opening new offices do so. It means they may need a better phone system.
CallingAgency contacted small businesses with old phone systems, growing teams, or multiple offices. In eight months, the campaign booked 106 meetings and found more than 72 potential customers who were a good fit.
Don’t add a business to your customer list immediately. Check these three things first:
- Does the business use an old PBX, key phone system, or traditional phone lines?
- Is the business opening a new office, hiring more staff, having phone problems, or paying high repair costs?
- Who makes decisions about the phone system? Is it the owner, IT manager, or office manager?
The FCC reported 8.6 million traditional business phone lines in June 2025. This was 18.2% fewer than the previous year. This data says that traditional phone lines are becoming less common now, but some small businesses still use them.
For example, an accounting firm is opening a second office. Its owner wants employees in both offices to communicate easily. This is the time when you can offer them UCaaS.
Not every business with an old phone system is ready to switch. You need to ask about their current system and the problems they are facing, then give your offer.
What Trigger Events Make a Legacy Business Ready to Switch?
Even a legacy business can switch to a new phone system when their landline service or phone service is ending. Other reasons can be that their old system is no longer supported, they are moving to a new office, or maybe they are hiring more employees.
Cisco has stopped supporting its CUCM 12.5 phone system since August 31, 2025. This means Cisco no longer provides support for this version. For example, a law firm uses Cisco CUCM 12.5 to manage its phone calls. But Cisco no longer supports this version. In that case, the firm will have to switch to a newer phone system.
Even Mitel has stopped giving technical support to an old phone system called MiVoice Office 250 since June 30, 2026.
AT&T has also received permission to stop some traditional landline services for about 90,000 customers in parts of 18 states, starting November 15, 2026. This means some customers may need another legacy phone service. It does not affect every customer in those states.
Trigger Table for Legacy Phone Accounts
| Trigger | How to spot it | What to ask |
| Landline shutdown | The customer receives a shutdown notice. | “Has your phone provider sent you a shutdown notice?” |
| PBX support ending | The customer uses a Cisco, Avaya, Mitel, or NEC system. Check its model and support date. | “What phone system model do you use?” |
| Office move | The company is moving or opening another office. | “Will the new office need a phone system?” |
| More employees | The company is hiring more staff. | “How many employees will you add this year?” |
Always keep a record of those signs that helped you get customers. Sometimes a business using an old phone system may not need a new one if the system works well. So, this cannot be the reason every time.
Who to Contact at a Business Still on an Old PBX
If a business is still on an old PBX, contact its IT manager or operations manager first. They may know if the business has problems with its phone system. And about the cost, talk to the owner. They can assure you whether the business can buy a new system.
In CallingAgency’s Orlando Telecom campaign, we contacted IT managers, operations managers, and owners. From there, we learned that in small businesses, office managers make most deals with the phone company.
| Role | Main concern | What to ask |
| IT manager | System support | “Does the manufacturer still support your PBX?” |
| Operations manager | New offices and staff | “How will staff answer calls at the new office?” |
| Owner | Cost and risk | “How much does your phone system cost each month?” |
| Office manager | Daily phone problems | “Who do you call when the phones stop working?” |
You can find the right person on LinkedIn or the company’s website. If they are not available there, call the company and ask, “Who manages your phone system?”
The IT manager may know about phone problems. So, ask him about it. But to know about the cost of a new system, you have to contact the owner.
How to Open the First Call With a Legacy PBX Prospect
To open the first call with a legacy PBX project, start by explaining why you are calling. For example, the business may be opening a new office or maybe its old phone system is losing support. In that case, you can ask how their current phone system is going and what their future plans are.
Here’s an example call you can follow:
Rep: Hi {{FirstName}}, I heard you’re opening a second office. Will you use your current phone system there?
Prospect: We haven’t decided yet.
Rep: Would you like to have a short call to discuss your options?
Let’s say the business’s phone system is losing support. In that case, mention that system’s model and the date when its support ends. Or let’s say the business received a notice about the end of its landline service or phone service. At that time, you can ask them what the notice says.
If you don’t have any answer as to why the business might need a new system, ask the business about its plans. If the prospect says their current system works well, ask them whether the manufacturer still provides support for it.
Qualification Checklist
Before booking a meeting, check these four things:
- Who makes the decision?
- Which phone system do they use?
- How much do they pay?
- Can you arrange a meeting?
Write down the answers in your customer record system (CRM). It must include the phone company’s name, current system, contract end date, and reason why the business wants a change.
If the business wants a new phone system, arrange a meeting. If it doesn’t want one yet, contact it again later.
How Do You Sell the Migration Instead of the Features?
To sell the migration, you need to explain to the prospect how their business can switch to UCaaS solutions. You need to assure them too that they don’t have to worry about losing phone numbers, stopping calls, or buying unnecessary new equipment.
Here are some of the factors you need to keep in mind:
- Keep the same numbers: The business can usually keep its current phone numbers when switching to UCaaS solutions. Under US rules, moving simple phone numbers must take one business day or less. Other number transfers may take up to four business days. The full switch to UCaaS may take longer.
- Keep calls working: Test the new phone system before using it. If possible, keep the old system working until the new one is working properly.
- Keep old phones: Ask the new provider if the business’s current phones will work with UCaaS.
Follow these four steps while you are selling this migration:
- Write down the business’s phone numbers and the features it uses, like call recording, call routing, etc.
- Ask the new phone company if the business can keep its current numbers.
- Set a date for the business for when it will start using UCaaS solutions.
- Test the new system by making calls, receiving calls, transferring calls, and call forwarding. Once the new one works properly, turn off the old system.
Also, check whether fax machines, alarms, and elevator phones will still work. Some may need traditional phone lines. Most importantly, the business must have a good internet connection.
Finally, compare the costs of both systems. See what brings in total after calculating the old system’s phone bills, repair costs, and equipment costs. Then calculate the UCaaS monthly fees, setup costs, and support fees. And find the difference in cost between the two systems.
How to Follow Up Across Calls, Email and LinkedIn
Be it on calls, email or LinkedIn, follow up with the buyer at the right time. It could be just before their phone system’s support ends, when their contract expires, or when they open a new office.
When you make your first call, save certain details in your customer record system, allowing CRM integrations. Record which phone system they use, they might need a new system, some important dates, the person’s job role, etc. Based on these details, plan when to contact the buyer again. You can also use B2B lead generation services if you are facing issues in recording details or reaching the prospect.
On each channel, you must have the conversation differently:
- Call: Call when an important date is near. Here, you can ask if they have decided to change their phone system.
- Email: Send a short email when you have to ask about their plans.
- LinkedIn: Use this platform to share helpful information, such as a notice about old phone systems or a guide to switching systems.
Give the buyer something helpful each time. For example, you can explain how to keep their phone numbers when switching systems.
After each contact, record their answer and your next step through CRM integrations. If the buyer wants to wait until their office lease ends, contact them closer to that date. If they ask you to stop contacting them, respect their decision.
When a Legacy Account Isn’t Worth Chasing Yet
Understand that a legacy account isn’t worth chasing yet, maybe because they are not ready to buy a new phone system. There can be more reasons. Such as:
- The business might have just bought a new phone system, so they don’t need another one yet.
- Their contract might not have ended and changing phone companies before the time may cost them extra money.
- Their current system works well and they have no problems, so they don’t need to change anything.
Handle the sales objections from these small businesses and don’t pressure them to buy your legacy phone service. Ask when they might be ready to change their phone system and contact them just before that due time.
It will be better if you write down the reasons why each business isn’t ready to switch. Also, write down when their contract ends. Then set a reminder to contact those small businesses again later.
Conclusion
To sell UCaaS, you need to understand what the business needs. Then find out how much their current system costs. Then explain to them how UCaaS can help the business. You should also assure them how to switch without losing phone numbers or interrupting calls.
However, check the internet and existing phones before switching. Then test the new system and then you can turn off the old one. If the business isn’t ready, ask when they might switch. Record that date and contact them again at that time.
Always focus on solving the buyer’s problem, not just selling the legacy phone service. Also, you must make the switch easy and help the business choose the right phone system.
Frequently Asked Questions
Is the PBX being phased out?
The government has not banned all PBX phone systems. However, some old systems are losing support, and some phone companies are ending traditional phone services. For example, Cisco stopped supporting the CUCM 12.5 phone system. AT&T has also asked to stop providing traditional copper phone service in some areas of 18 US states.
How do you sell VoIP to small businesses?
To sell VoIP solutions to small businesses, first find out why the business might need a new phone system. The reason can be that they may be moving to a new office, or their old phone system may no longer get support. Then ask the person in charge of the phones how much the business pays and who decides whether to buy a new system. Then explain how much the new system may cost and what it can do.
What replaces an on-premise PBX?
Businesses can choose between two ways to replace an on-premise PBX. It’s either Hosted PBX or UCaaS. Both let businesses use an online phone system. Meanwhile, UCaaS lets employees make video calls and send messages too. What the business will choose depends on its needs and which phones it already has.
What do you say when a prospect says their PBX still works?
When a prospect says their PBX still works, ask “Does the company still support your phone system?” and “When does your phone contract end?” If support has ended, explain that fixing problems may be harder. If the business doesn’t need a new system now, just save the details and contact them again later.
