Side-by-side
| EPABX | IP-PBX | |
|---|---|---|
| Technology | Dedicated hardware exchange | Software on a server over the IP network |
| Extensions | Wired analog/digital handsets | IP phones, softphones, analog via FXS |
| Adding users | New extension cards and cabling | Add a user in software |
| Remote users | Not usually | Yes |
| Multiple offices | Separate systems | One system across branches |
| Built-in IVR, voicemail-to-email, call recording, reports | Rare / add-ons | Standard |
| Outside lines | Analog, PRI | SIP trunks, PRI, GSM, analog |
See the full feature table on our IP-PBX page.
When to upgrade
- You are adding staff or branches
- Staff need to work from home
- You need call recording, IVR or reports
- Your EPABX needs costly expansion cards or repairs
How to migrate
- Keep your lines: connect PRI via a PRI gateway or card, analog lines via an FXO gateway.
- Keep analog handsets via an FXS gateway, or replace them with IP phones.
- Move departments one at a time.
Frequently asked questions
Is an IP-PBX better than an EPABX?
For most growing businesses, yes: it scales more easily, supports remote and multi-office users, and includes advanced features. An EPABX can still suit a small, fixed office that only needs basic calling.
Can I use my existing analog phones with an IP-PBX?
Yes, through an FXS gateway, which connects analog phones and fax machines to the IP-PBX.
Can I keep my PRI and landlines?
Yes. PRI lines connect through a PRI card or PRI gateway; analog lines through an FXO gateway.