What is the difference between GPON and EPON?

GPON offers higher downstream bandwidth and better QoS. EPON provides symmetric bandwidth at lower cost. GPON supports split ratios up to 1:128 for wider coverage.

Which ONU/ONT is compatible with my OLT?

Our L880G and L801 series ONUs support XPON dual-mode and work with Huawei, ZTE, FiberHome and other major OLT brands. Contact support to confirm compatibility.

What is the difference between SC/APC and SC/UPC connectors?

SC/APC (Angled Physical Contact) and SC/UPC (Ultra Physical Contact) are two common fiber optic connector polish types. The key difference is the end-face angle.SC/UPC: Flat end-face with slight curve, return loss ≥50dB. Used for general-purpose data transmission. Blue color.SC/APC: 8° angled end-face, return loss ≥60dB. Used for RF video transmission (CATV) and PON networks. Green color.They are NOT interchangeable — mixing them can damage the connector end-face.

How do I choose the right fiber optic splitter for my network?

Choosing the right fiber optic splitter depends on several factors:Type: PLC splitters offer better performance for FTTx; FBT splitters suit smaller setupsRatio: Common ratios: 1×2, 1×4, 1×8, 1×16, 1×32, 1×64Package: ABS box (indoor), Mini steel tube (tight spaces), LGX cassette (rack mount)Connector: SC/APC for CATV, SC/UPC for dataFor GPON/EPON FTTH deployments, a 1×8 or 1×16 PLC splitter with SC/APC connectors is recommended.

What is the maximum distance for fiber optic transmission?

Fiber optic transmission distance depends on fiber type and equipment:Single-mode fiber (OS2): Up to 40km+ without amplificationMulti-mode fiber (OM1-OM5): 300m to 550m at 10GbpsGPON: Typically 20km reachEPON: Typically 20kmXGS-PON: Up to 40km1550nm wavelength has lower attenuation (≈0.2dB/km) vs 1310nm (≈0.35dB/km). For standard GPON FTTH, 20km is typical from OLT to ONU.

How do I configure an ONU/ONT for my fiber network?

Configuring an ONU/ONT involves these steps:Connect: Plug fiber cable into PON port, Ethernet to your router/PCPower on: Wait for PON LED to turn solid (optical signal received)Access web: Set PC to same subnet (192.168.1.x), open ONU IP (usually 192.168.1.1)Configure WAN: Set connection type (PPPoE, DHCP, or Static IP) per ISP requirementsRegister: Some ISPs require registration via serial number, LOID password, or MAC address

What is XGS-PON and how is it different from GPON?

XGS-PON (10 Gigabit Symmetric PON) is the next-generation PON technology offering 10Gbps symmetric bandwidth. Key differences from GPON:Speed: GPON = 2.5Gbps down / 1.25Gbps up. XGS-PON = 10Gbps both directionsWavelength: XGS-PON uses 1577nm down / 1270nm up (different from GPON's 1490nm/1310nm)Coexistence: XGS-PON can share the same fiber with GPON via WDMXGS-PON ONUs work with dual-mode OLTs but need an XGS-PON port for 10G speeds. Ideal for 4K/8K streaming, cloud computing, and enterprise use.

How Many Homes Can One OLT Port Serve?

In GPON networks, one OLT port typically serves 32 to 128 homes, depending on the split ratio. A 1:32 splitter is most common for FTTH deployments. With XGS-PON, one port can serve 256+ subscribers. Actual capacity depends on bandwidth per user — if each user needs 100Mbps, a GPON port (2.5Gbps down) handles ~25 users at peak. For our 2-port EPON OLT (L202), each port supports up to 64 ONUs, giving a total of 128 homes per device.

How Is GPON Data Secured on Fiber Optic Networks?

GPON uses AES-128 encryption to secure downstream data. Each ONU receives only its own data — the OLT encrypts traffic with a unique key per ONU. Upstream data is inherently secure because each ONU transmits in its assigned time slot. AES encryption is enabled by default in most OLTs like our EPON/GPON models. For additional security, MAC address filtering and ONU authentication are supported.

Is Fiber Optic Cheaper Than Copper in the Long Run?

Yes. While fiber optic cabling costs 20-30% more upfront, its total cost of ownership (TCO) over 10 years is 40-60% lower than copper. Fiber supports 40Gbps+ bandwidth vs copper's 10Gbps limit, has 25+ year lifespan (copper: 5-10 years), and needs no signal repeaters for up to 40km. For ISPs, the breakeven point is typically 2-3 years. Our single-mode fiber patch cables and splitters provide reliable long-term infrastructure.

Huawei HG8310M GPON ONU Setup Guide 2026

1. Introduction

The Huawei HG8310M is a compact, single-port GPON Optical Network Unit (ONU/ONT) engineered for high-density Fiber-to-the-Home (FTTH) deployments. Built around the proven EchoLife platform, it delivers up to 2.488 Gbps downstream / 1.244 Gbps upstream over a single fiber while keeping power consumption and footprint to a minimum. Internet service providers, FTTH integrators and enterprise networks choose the HG8310M because it is inexpensive (around $45), highly compatible with multi-vendor OLTs, and trivial to provision in bulk. This 2026 guide walks through specifications, hardware, installation, OLT registration, LED diagnostics and troubleshooting.

2. Key Specifications

Parameter	Specification
Device Type	GPON ONU / ONT
GPON Port	1 × GPON, SC/APC connector
Ethernet Port	1 × GE RJ45 (10/100/1000 Mbps auto-negotiation)
Optical Standard	ITU-T G.984 (GPON), Class B
Power Supply	5–12V DC external adapter
VLAN	IEEE 802.1Q tagging andamp; trunking
IP Protocol	IPv4 / IPv6 dual stack
Management	OMCI (TR-069 capable platform), SNMP
Authentication	SN / LOID / Password
Dimensions (approx.)	100 × 75 × 25 mm

3. Hardware Overview

The front panel carries four status LEDs — PWR (power), LOS (loss of signal), PON (registration state) and LAN (Ethernet link). The rear panel hosts the GPON optical port (SC/APC, dust cap fitted from the factory), the single Gigabit RJ45 LAN port, the DC power jack and a recessed reset button. The chassis is fan-less ABS plastic with a wall-mount keyhole, making it suitable for installation inside fiber distribution boxes or behind a customer ONT shelf. Always remove the SC/APC dust cap and verify the ferrule is clean before inserting the patch cord.

4. Installation Steps

Connect the fiber: Plug the SC/APC fiber patch cord into the GPON port. Keep the bend radius above 30 mm and avoid kinking the drop cable.
Connect the network cable: Run a Cat5e/Cat6 cable from the GE LAN port to the customer router/PC or to a switch uplink.
Power on: Attach the 5–12V DC adapter. The PWR LED should light immediately and the PON LED will begin to blink as the unit attempts to register with the OLT.

5. Configuration andamp; OLT Registration

The HG8310M is a managed ONU — the OLT pushes its service profile via OMCI, so most provisioning happens on the OLT side, not on the device. Choose one of three authentication modes:

SN authentication: Read the serial number (printed on the label, format HWTCxxxxxxxx) and bind it to a GPON line profile on the OLT.
LOID authentication: Assign a Logical ONU ID (and optional password) when the operator uses LOID-based provisioning.
Password authentication: Configure the GPON registration password to match the OLT's expected value.

After authentication, create the service flow and map the customer VLAN using IEEE 802.1Q. Typical residential profiles use a single tagged VLAN for Internet; triple-play deployments add separate VLANs for VoIP and IPTV. IPv6 is enabled through the OLT service profile when dual-stack is required.

6. LED Status Indicators Guide

LED	State	Meaning
PWR	Green (solid)	Power is on and normal
PWR	Off	No power — check the adapter
LOS	Off	Optical signal received normally
LOS	Red (blinking)	No / weak optical signal received
PON	Blinking	Registering / authenticating with the OLT
PON	Green (solid)	Successfully registered with the OLT
LAN	On / blinking	Ethernet link active / data traffic
LAN	Off	No Ethernet link detected

7. Troubleshooting

LOS is red: The ONU is not receiving optical power. Check the fiber connection, clean the SC/APC ferrule, verify the drop cable for breaks/bends, and confirm the OLT PON port is enabled. Measure receive power (it should typically be between andminus;8 dBm and andminus;28 dBm).
PON keeps blinking (never registers): Authentication is failing. Re-check the SN/LOID/Password matches the OLT binding, confirm the ONU is not already registered on another port, and ensure the GPON line/service profile exists on the OLT.
LAN not working: Confirm the LAN LED is on, swap the Ethernet cable, check VLAN/service-flow configuration on the OLT, and verify the connected device's IP settings (DHCP vs. static).

8. Common Compatible OLTs

As a standards-based GPON ONU, the HG8310M interoperates with most major OLT platforms:

Huawei MA5680T, MA5683T, MA5608T (native, recommended)
ZTE C300 / C320
Fiberhome AN5516 series

For the most reliable OMCI behaviour and management features, pairing with a Huawei MA56xx OLT is recommended.

9. Conclusion

The Huawei HG8310M remains one of the best-value 1GE GPON terminals for FTTH and enterprise fiber links in 2026: compact, low-power, multi-vendor compatible and easy to provision at scale. If you are deploying or expanding a GPON network, it is a dependable, low-cost endpoint.