Fidium & Consolidated Fiber Router Setup: Direct ONT Connect Guide
To connect your own router to Fidium Fiber (or Consolidated Communications), plug your router's WAN port directly into the 10GbE/2.5GbE Ethernet jack on the Adtran SDX 6205 or 6310 XGS-PON ONT. Fidium uses untagged Dynamic DHCP (IPoE) with zero PPPoE credentials, but you must release the old gateway's DHCP lease or power down the ONT for 15 minutes to clear MAC address locks.
- Pure Layer-2 Transparent Bridge: Fidium's Adtran SDX optical network terminals are dedicated optical bridges, allowing you to bypass the rented Attune WiFi gateway entirely with zero double NAT.
- Untagged Dynamic DHCP (IPoE): Unlike CenturyLink or Windstream, standard Fidium residential fiber requires no 802.1Q VLAN tagging on the WAN interface.
- Mandatory MAC Table Release: Fidium OLTs strictly bind the public IPv4 lease to the initial router's MAC address; release the WAN IP in the gateway GUI or power-cycle the ONT for 15 minutes before connecting your router.
- Native IPv6 /56 Prefix Delegation: Enable DHCPv6 client mode with IA-PD on your third-party router to receive up to 256 individual /64 local VLAN subnets.
Fidium Fiber Network Architecture: Adtran Optical ONTs
Fidium Fiber (the residential fiber-to-the-home brand of Consolidated Communications) serves major metropolitan and rural markets across Maine, New Hampshire, Vermont, California, Texas, Pennsylvania, and Illinois. Operating over symmetrical XGS-PON (10 Gigabit Passive Optical Network) and legacy GPON, Fidium delivers tiers from 100 Mbps up to 2 Gbps symmetrical.
At the customer demarcation, Fidium terminates optical fiber into a dedicated standalone Optical Network Terminal (ONT):
- Adtran SDX 6205: Standard 10G XGS-PON terminal featuring a single 100M/1G/2.5G/5G/10G multi-gigabit Base-T RJ45 Ethernet port.
- Adtran SDX 6310: Outdoor-rated or indoor hardened multi-gigabit optical receiver with dual auto-sensing multi-gig ports.
- Nokia G-010G-A: Legacy GPON unit (1 Gbps symmetric ceiling) found in early Consolidated fiber installations.
Crucially, these Adtran terminals are pure Layer-2 media converters, not routing gateways. They contain no firewall, no DHCP server, and no internal Wi-Fi radios. Therefore, you do not need to hunt through an ONT menu to configure 'Bridge Mode'—the ONT is already an unmanaged optical bridge.
The Fidium MAC Lockout: Clearing the DHCP Lease
The single most common stumbling block when setting up a personal router on Fidium is the OLT MAC Address Sticky Lock. Fidium's upstream Optical Line Terminal (OLT) and broadband access server (BRAS) assign a single public IPv4 address tied directly to the physical MAC address of the device plugged into the ONT.
If you simply pull the Ethernet cable out of the rental Attune router (typically an Adtran 854-v6 or Plume SuperPod) and insert it into your ASUS, UniFi, or pfSense WAN port, your router will fail to obtain a WAN IPv4 address (status indicator stays red/amber).
Step-by-Step Procedure to Clear the Fidium Lease:
- Graceful WAN Release (Recommended): Log into your existing Fidium/Attune gateway web interface (default IP
192.168.1.1). Navigate to WAN Status > DHCP Client and click Release Lease. Unplug the gateway immediately after releasing. - The 15-Minute Power-Cycle Flush: If you cannot access the gateway GUI, disconnect the power brick from the Adtran ONT. Leave the ONT completely powered off for 15 to 20 full minutes. This allows the upstream OLT ARP cache timer to expire and flush the old MAC binding.
- Call Fidium Tier-1 Tech Support: If the WAN port still fails to negotiate an IP after 20 minutes, call Fidium support (1-844-4-FIDIUM) and ask the representative to: 'Please break the active DHCP MAC binding on my PON port so my new firewall MAC can bind.'
Third-Party Router WAN Configuration (UniFi, ASUS, pfSense)
Once the MAC binding is cleared, connect a tested solid copper Cat6 or Cat6a patch cable from the Adtran ONT's 10GbE Ethernet port directly to the WAN / Internet port on your own router. Configure your router's WAN settings as follows:
| Configuration Parameter | Required Setting on Fidium | Technical Explanation |
|---|---|---|
| WAN Connection Type | Automatic IP / Dynamic DHCP (IPoE) |
Standard RFC 2131 DHCP; zero PPPoE usernames or passwords required. |
| 802.1Q WAN VLAN Tagging | Disabled (Untagged) |
Standard Fidium residential fiber hands off untagged traffic. (VLAN 201 is only used in legacy DSL/GPON transition zones). |
| WAN MTU Size | 1500 Bytes |
Full unfragmented Ethernet frames without PPPoE (1492) overhead. |
| DNS Server Assignment | 1.1.1.1 / 9.9.9.9 |
Override ISP upstream resolvers with encrypted, privacy-respecting DNS. |
| IPv6 Connection Mode | Native / DHCPv6 with IA-PD |
Delegates globally routable /56 IPv6 prefixes across your internal subnets. |
In your router settings (e.g., UniFi Network Settings > Internet > WAN or ASUS WAN > Internet Connection), confirm that the WAN port negotiates at 2.5 Gbps or 10 Gbps Full Duplex when subscribed to Fidium's 1-Gig or 2-Gig multi-gigabit packages.
IPv6 Prefix Delegation Setup for Multiple VLANs
Fidium natively routes IPv6 across its fiber footprint. Setting up IPv6 bypasses IPv4 NAT entirely, giving home devices end-to-end connectivity with lower latency for modern online gaming and cloud services:
- IPv6 Connection Type: Select DHCPv6 (do not use 6to4 or 6in4 tunnels).
- Prefix Delegation (IA-PD): Check the box for Request IPv6 Prefix and set the delegation size to /56.
- LAN IPv6 Configuration: Set internal LAN interfaces to SLAAC + Stateless DHCPv6. This instructs your router to advertise the delegated
/64subnets to all phones, PCs, and smart TVs automatically.
If you segment your network into multiple 802.1Q VLANs (e.g., VLAN 10 for Trusted PCs, VLAN 20 for IoT, and VLAN 30 for Guest), use our IPv6 Prefix Delegation Calculator to verify that each local VLAN receives a unique, unfragmentable /64 block.
Decommissioning the Attune / Plume Rented Hardware
Bypassing the Fidium rental router eliminates the monthly hardware fee and ensures full control over your firewall rules, local DNS, and guest Wi-Fi. Follow these closing steps:
- Delete the Attune / HomePass App Account: Inside the Fidium Attune app, dissociate your home network and remove your account. This prevents the cloud management system from attempting to query or reconfigure your gateway.
- Power Down Rented Mesh Extenders: Disconnect any auxiliary Plume or Adtran wireless pods located throughout the building to prevent co-channel RF interference with your new Wi-Fi 6E/7 access points.
- Verify Public IPv4 Address: Check your third-party router's WAN IP. If it begins with
192.168.x.xor10.x.x.x, your router is connected to another gateway rather than the ONT. A valid Fidium WAN IP will be a public routable address (e.g.,66.x.x.x,64.x.x.x, or72.x.x.x). - Return Rental Equipment: Request a prepaid UPS return label from Fidium customer service to return the gateway and pods, confirming the equipment serial numbers on your receipt to avoid unreturned hardware charges.
Fidium Fiber Hardware, Port Speeds & Network Parameter Matrix
| Equipment Model | Hardware Class | Ethernet Port Speed | VLAN Tagging | WAN Protocol |
|---|---|---|---|---|
| Adtran SDX 6205 | XGS-PON Terminal | 1x 10G/5G/2.5G/1G RJ45 | Untagged (0) | Dynamic DHCP (IPoE) |
| Adtran SDX 6310 | XGS-PON Terminal | 2x 10G Multi-Gigabit | Untagged (0) | Dynamic DHCP (IPoE) |
| Nokia G-010G-A | GPON Terminal | 1x 1 Gbps Gigabit RJ45 | Untagged (0) | Dynamic DHCP (IPoE) |
| Adtran 854-v6 | Attune Wi-Fi 6 Gateway | 1x 2.5G WAN + 4x 1G LAN | Bypass Hardware | Return for Credit |
| Plume SuperPod | Attune Mesh Extender | 2x 1 Gbps Gigabit RJ45 | Bypass Hardware | Power Down / Return |
Fidium Fiber Own Router Setup Checklist
- Locate the Adtran SDX 6205 or 6310 optical ONT and verify solid green Power and Optical lights.
- Access your current Attune gateway GUI at 192.168.1.1 and click 'Release DHCP Lease' before disconnecting.
- If no GUI access is available, disconnect the Adtran ONT power cord for 15 to 20 minutes to clear the upstream MAC table.
- Run a Cat6 or Cat6a patch cord directly from the ONT 10G/2.5G Ethernet jack to your router WAN port.
- Set your router WAN connection type to Automatic IP / Dynamic DHCP (leave 802.1Q VLAN tagging disabled).
- Enable Native IPv6 DHCPv6 client with /56 Prefix Delegation to allocate IPv6 across local VLAN subnets.
- Verify your router pulls a public WAN IPv4 address and test wired throughput at speedtest.net.
Frequently Asked Questions
Do I need a modem to use my own router on Fidium Fiber?
No. Fiber networks do not use modems. Fidium provides an Optical Network Terminal (ONT) such as the Adtran SDX 6205, which translates fiber optic pulses into Ethernet. You plug your router directly into the ONT's Ethernet port with an ordinary Cat6 patch cable.
Does Fidium Fiber require a PPPoE username and password?
No. Fidium uses standard IPoE/Dynamic DHCP. Your router will automatically acquire a public IP address from Fidium's DHCP server as long as the ONT's previous MAC lock has expired.
What VLAN ID does Fidium Fiber use for internet?
Standard Fidium residential fiber does not use VLAN tagging on the WAN port (leave VLAN tagging disabled or set to 0). Only certain legacy DSL-conversion GPON zones in Consolidated legacy markets use VLAN 201.
Why does my router fail to get an internet IP from the Fidium ONT?
Fidium's Optical Line Terminal binds your IP to the MAC address of the previous router. Power down the ONT for 15 to 20 minutes to clear the ARP cache, or contact Fidium tech support to manually clear the MAC table.
Related Router Setup & Engineering Guides
- Kinetic by Windstream Fiber: ONT & Own Router Setup Guide — Connect your own router to Kinetic by Windstream fiber. Step-by-step setup for Nokia and Adtran ONTs, Sagemcom Fast 5380 bridge mode, and VLAN 201 tagging.
- TDS Telecom Fiber: Calix ONT Direct Connect & Actiontec Bridge Mode — Learn how to use your own router with TDS Telecom fiber. Configure direct Calix GigaPoint ONT connections or set the Actiontec T3200 gateway into transparent bridge mode.
- Sonic 10G Fiber Router Setup: Use Your Own Router with the ONT — Connect your own router directly to Sonic 10G fiber. Step-by-step setup for Adtran XGS-PON ONTs, DHCP lease release, and bypassing the rented eero gateway.
- How to Set Up a Router — Set up a home or small office router from scratch: connect WAN/ONT cables, release ISP DHCP leases, configure WPA2/WPA3 WiFi, and harden admin access.