Replacing a business phone system usually means replacing every phone on every desk. That is expensive, wasteful and disruptive. E-MetroTel Green Migration takes a different approach: upgrade the system behind your phones, keep the phones your team already knows, and replace only what truly needs replacing.
This guide explains how a PBX migration works for NEC, Avaya, Nortel and Panasonic systems, and how it protects the investment you have already made.
Key takeaways
- Green Migration upgrades your phone system while keeping many of your existing NEC, Avaya, Nortel and Panasonic phones.
- You can move to the cloud or stay on-premises, and add modern features at your own pace.
- Keeping working phones lowers cost, reduces electronic waste and avoids retraining your team.
What Is Green Migration?
Green Migration is E-MetroTel’s way of modernizing a legacy phone system without a full rip-and-replace. Your old PBX is replaced by a modern, supported platform, while compatible desk phones stay where they are. It upgrades what matters, replaces only what is necessary, supports what you already own, and protects your investment for the long term.
Why Replacing Every Phone Costs More Than You Think
- Hardware cost: new phones for every user add up quickly.
- Electronic waste: working phones end up in storage or landfill.
- Retraining: staff need time to learn new phones and new button layouts.
- Disruption: a big switchover affects customers and daily work.
Upgrade Paths by Phone Brand
NEC
Keep your NEC digital and IP phones while we upgrade the system behind them, in the cloud or on-premises with Galaxy appliances. Learn more about NEC migration.
Avaya
Our DSM16 card and InfinityCX software support Avaya IP and digital phones, so you can move to a modern system without expensive reprogramming and with minimal downtime. Learn more about Avaya migration.
Nortel
XSTIM technology supports the features of Nortel’s legacy phones, including the M2000, M3000, T7000 and IP Phone 2000 series. Your team keeps familiar workflows while the system behind them is modernized. Learn more about Nortel migration.
Panasonic
Panasonic NS700 and NS1000 systems and KX-DT, KX-NT and KX-T phones are supported, whether digital, IP or SIP. Move to the cloud or a Galaxy appliance while keeping familiar features and button layouts. Learn more about Panasonic migration.
Cloud or On-Premises: Your Choice
Every business is different. Choose the deployment that fits yours:
- Cloud phone system: no server to maintain, easy to scale across locations.
- On-premises with Galaxy appliances: full control and data on site.
- Hybrid: combine both for redundancy and flexibility.
How a Green Migration Works
- Assess: we review your current system, phones and wiring.
- Plan: choose cloud, on-premises or hybrid, and decide which phones to keep.
- Migrate: compatible phones connect to the new platform with minimal disruption.
- Grow: add modern features now, and replace phones only when you choose to.
Frequently Asked Questions
What is a PBX migration?
A PBX migration moves your business phone service from an older phone system to a newer one. With Green Migration, many of your existing phones can move with you.
Can I keep my existing desk phones?
In many cases, yes. Many NEC, Avaya, Nortel and Panasonic digital and IP phones can connect to an E-MetroTel platform. Our team can confirm which of your models are supported.
Should I choose cloud or on-premises?
Cloud suits businesses that want less equipment to manage. On-premises suits businesses that want full control or need to keep data on site. Hybrid gives you both.
Will my business experience downtime?
Migrations are planned to keep disruption to a minimum, and because staff keep their familiar phones, there is little or no retraining.
Upgrade Confidently and Protect What You Own
Green Migration helps you upgrade with confidence, replace only what is necessary, support the phones you already own, and protect your investment for years to come.












