GPON VoIP Bridge ONT with 2.5GbE LAN

The Zyxel PM5311-T0 GPON VoIP Bridge ONT comes with one 2.5GbE LAN port for the downlink interface. Service providers can deliver premium services to customers with demands for reliable high-bandwidth and high-speed internet without altering the existing GPON network infrastructure.

  • Gigabit fiber
  • 2.5GbE LAN
  • Compact size
  • OMCI protocol
  • OPAL platform
  • VoIP SIP protocol
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Future-proof investment during service upgrade

Thanks to its superior interoperability, the PM5311-T0 can connect to any layer-3 devices such as routers, Wi-Fi APs, and home gateways. Given the rapid evolution of WLAN technology and gateway interface requirements, service providers can always deliver premium services with cutting-edge technology without changing the entire fiber network infrastructure.

2.5GbE LAN interface for optimal bandwidth utilization

Equipped with one 2.5GbE LAN port, the PM5311-T0 empowers service providers to fully utilize the existing GPON network while delivering premium services to meet the rising demands for reliable and high bandwidth connections.

Zyxel OPAL firmware achieves superior flexibility and shortens time to market

Compliant with the same OPAL firmware trunk applied in all Zyxel CPEs, the PM5311-T0 inherits a rich, field-proven feature set for guaranteed same user experience after migrating to new devices.

OMCI remote management for lower OPEX

Supporting OMCI, the PM5311-T0 significantly simplifies deployment complexity and lowers operating and maintenance costs with its remote management capabilities.

System specifications

GPON compliance
  • Complies with ITU-T G.984
  • DS/US speed: 2.488/1.244 Gbps
  • Wavelength: 1490 nm (DS) & 1310 nm(US)
  • Complies with class B+ type PMD
  • Physical distance reach to 20 km
  • Dynamic Bandwidth Allocation (DBA)
  • Configurable AES DS and FEC DS/US
  • GPON Encapsulation Method (GEM) supports Ethernet packet
  • Supports GEM header removal/insertion and data extraction/segmentation (GEM SAR)
  • Supports up to 32 T-CONs each with priority queues (US); supports up to 256GEM ports
Layer 2 networking features
  • Multicast transparent
  • IPv6 address transparent
Feature capability
  • VLAN IEEE 802.1Q
  • Ethernet port based VLAN tag and untag
  • Supports protocol based VLAN
  • 1:1 VLAN, N:1 VLAN, VLAN transparent bridge
  • Per-port QoS and CoS mapping according to IEEE 802.1q and IEEE
  • 802.1p priority
  • Section Initiating Protocol (SIP), RFC3261
  • Codec: G.711 a/u (64K), G.726 (32K), G.722, G.729
  • Echo cancellation
  • Fax/modem detection and pass-through
  • Voice Active Detection (VAD)
  • Comfort Noise Generator (CNG)
  • Dynamic jitter buffer
  • DTMF detection and generation
  • DTMF relay by in-band and out-of-band
  • SIP account (URL type included)
  • On-hook, off-hook and flash detection
  • Caller ID
  • Call transferring
  • Call hold/Call retrieve
  • Three way conference
  • Call waiting
  • Standard OMCI (ITU-T G.988)
  • Firmware upgrade via HTTP/HTTPS/OMCI

Hardware specifications

  • WAN: One gigabit optical interface SC/APC
  • LAN: One 100M/1G/2.5G Gbps RJ-45 port
  • FXS: One RJ-11 port
  • Reset: One reset/restore factory default button
  • Power switch: One push type button
  • LED indicators:
    • Power
    • PON
    • LAN
    • FXS

Power consumption

  • Power supply: 12 V DC/1 A
  • 12 Watt max

Physical specifications

  • Item dimensions (WxDxH): 124 x 107 x 33 mm (4.88” x 4.21” x 1.3”)
  • Item weight: 146 g (0.32 lb.)
  • Packing dimensions (WxDxH): 215 x 135 x 43 mm (8.46” x 5.31” x 1.69”)
  • Packing weight: 353 g (0.78 lb.)

Environment specifications

Operating environment
  • Temperature: 0°C to 40°C (32ºF to 104ºF)
  • Humidity: 10% to 90% RH (non-condensing)
Storage environment
  • Temperature: -30°C to 70°C (-22ºF to 158ºF)
  • Humidity: 10% to 95% RH (non-condensing)


  • FCC

Package contents

  • Power adapter
  • Ethernet cable
  • Quick Start Guide

*Please note that all specifications are subject to change without prior notice.

PM5311-T0 application diagram


File type Model Version Release date Language Download
Datasheet PM5311-T0 1 English
Quick Start Guide PM5311-T0 003 English

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