Top Picks at a Glance (DSL Only)
| Modem | DSL Standard | Built-in Router | Best For | Notes |
|---|---|---|---|---|
| 1. Zyxel C3000Z | VDSL2 | Yes (AC2400) | Best CenturyLink-approved DSL modem | Officially approved by CenturyLink |
| 2. CenturyLink C4000LG | VDSL2 | Yes (AC1900) | ISP-provided option (available refurb) | CenturyLink's own gateway |
| 3. Actiontec C3000A | VDSL2/ADSL2+ | Yes (AC3000) | Best for higher-speed DSL tiers | Compatible with most CenturyLink DSL plans |
| 4. ZyXEL C2100Z | VDSL2 | Yes (N600) | Budget pick for slower DSL | Older but reliable for plans under 100 Mbps |
| 5. Netgear DM200 | VDSL2/ADSL2+ | No (modem only) | Standalone DSL modem + your own router | Best flexibility if you already own a router |
These picks are for CenturyLink DSL service only. Do not purchase a DSL modem if you have Quantum Fiber — see the section below.
Our Picks in Detail
- Yes (AC2400)
- Best CenturyLink-approved DSL modem
- Yes (AC1900)
- ISP-provided option (available refurb)
- Yes (AC3000)
- Best for higher-speed DSL tiers
- Yes (N600)
- Budget pick for slower DSL
- No (modem only)
- Standalone DSL modem + your own router
DSL vs. Quantum Fiber: Which Service Do You Have?
CenturyLink/Lumen operates two entirely different types of internet service in different regions, and the equipment requirements are incompatible:
- CenturyLink DSL: Internet delivered over copper telephone lines. Uses ADSL2+ (for plans up to ~40 Mbps) or VDSL2 (for plans up to ~100+ Mbps). Requires a DSL modem with PPPoE support. You can buy your own compatible modem and save ~$15/month in rental fees.
- Quantum Fiber (formerly CenturyLink Fiber): Internet delivered over fiber-optic cable to an ONT (Optical Network Terminal) installed at your home. The ONT is the functional modem — it converts optical signals to Ethernet. You cannot replace or supplement the ONT with any third-party device. Quantum Fiber customers can only add their own Wi-Fi router behind the gateway in passthrough or bridge mode.
To confirm which service you have: look at the cable going to your modem. If it is a thin telephone-style DSL cable (RJ-11), you have DSL. If it is a black or white fiber cable entering an ONT box (often mounted on a wall with an Ethernet cable running to the router), you have Quantum Fiber. Your monthly bill type will also indicate which service you are on.
Why CenturyLink DSL Needs PPPoE
PPPoE (Point-to-Point Protocol over Ethernet) is an authentication mechanism that CenturyLink uses to verify your account before granting internet access on their DSL network. Unlike cable ISPs where the modem is provisioned by MAC address, CenturyLink DSL requires you to enter a username and password in your modem's WAN settings. This is typically your CenturyLink email address and your account password.
When setting up a new DSL modem, look for the WAN or Internet settings section. Select PPPoE as the connection type and enter your CenturyLink credentials. If you have never set up DSL before or do not know your PPPoE credentials, call CenturyLink at 1-800-244-1111 — support can confirm your username and reset your password. The PPPoE login is distinct from the password you use to log in to CenturyLink's website, though some accounts use the same credentials.
How to Activate Your Own DSL Modem on CenturyLink
- Confirm you have CenturyLink DSL service (not Quantum Fiber). Check your service address and bill type.
- Purchase a compatible DSL modem from the approved list. The Zyxel C3000Z is the most commonly recommended CenturyLink-compatible third-party DSL gateway.
- Connect the modem to your telephone DSL line using an RJ-11 cable (not Ethernet). If you have a DSL splitter or filter on the line, connect to the filtered outlet.
- Access the modem's admin panel (typically 192.168.1.1 or as specified in the manual).
- Configure the WAN/Internet connection type as PPPoE. Enter your CenturyLink username and PPPoE password.
- Call CenturyLink support at 1-800-244-1111 to notify them you are using your own modem and to confirm the line settings (VDSL2 profile, SNR margin). They may need to push updated configuration to your line.
- Return your rented modem to a CenturyLink store or via the prepaid return label CenturyLink provides.
Rental Fee Savings for CenturyLink DSL
CenturyLink's modem rental fee is approximately $15/month — $180/year. A DSL modem like the Zyxel C3000Z costs roughly $100–150 and will last many years on a relatively stable DSL infrastructure. At $15/month in savings, a $120 modem breaks even in 8 months. Over 3 years, you save approximately $420 compared to continuous rental.
One consideration: if CenturyLink DSL is available in your area but you are on an older ADSL2+ plan rather than VDSL2, you may be leaving significant speed on the table compared to the fiber alternative. If Quantum Fiber is available at your address, the monthly cost difference versus DSL may be small, and the significant speed improvement (typically 100 Mbps to 1 Gbps vs. 20–100 Mbps for DSL) often makes the upgrade worthwhile before investing in new DSL hardware.
Frequently Asked Questions
What type of modem does CenturyLink DSL require?
CenturyLink DSL requires a DSL modem with PPPoE (Point-to-Point Protocol over Ethernet) support — not a cable DOCSIS modem. The DSL signal comes over your phone line, not a coax cable. Make sure any modem you buy specifically supports ADSL2+, VDSL2, or both depending on your CenturyLink DSL tier.
Can I use my own modem with Quantum Fiber (CenturyLink fiber)?
No. Quantum Fiber uses a fiber-optic connection with an Optical Network Terminal (ONT) installed at your home. The ONT converts fiber signals to Ethernet — it is the functional equivalent of a modem and cannot be replaced by a third-party device. Quantum Fiber customers can add their own router behind the Quantum gateway in bridge/passthrough mode, but cannot replace the ONT itself.
Does CenturyLink DSL require a PPPoE username and password?
Yes — CenturyLink DSL uses PPPoE authentication. When setting up a new modem, you will enter your CenturyLink username (usually your email address) and password in the modem's WAN or DSL settings. Call CenturyLink at 1-800-244-1111 if you have never set up DSL before and do not know your PPPoE credentials.