May 22, 2024



ZyXEL GEPON OLT 1308S-22 is a mini chassis with a Layer 2 GEPON switch featuring 8 GEPON ports (including 3 PON modules), 4 Gigabit uplink ports (2 copper and 2 combo ports) and one 10/100 Mbps Ethernet port for out-of-band management. ZyXEL’s OLT-1308S-22 GEPON system (8-port GEPON Optical Line Terminal with 4-port GbE Switch) is located in the operator’s central office, while different types of Optical Network Units (ONU) are located at customer premises for FTTB/FTTH connections. The ZyXEL GEPON OLT 1308S-22 is connected by a single fiber to an optical power splitter that supplies the optical signal to as many as 512 sets of ONUs (each OLT PON port supports up to 64 ONU sets). For CPE compatibility, ZyXEL provides several models for different network architecture needs. [boxads]

  • 8 GEPON SFP open slots with DDMI support
  • 1000BASE-PX20 SFP for 20 km distance support
  • 2 Gigabit combo + 2 GbE SFP uplink ports compliant with IEEE 802.3/u/ab
  • Up to 4 trunking ports for uplinks
  • Support up to 64 ONUs per PON interface
  • Support FEC
  • Support AES or Triple Churning Encryption
  • Support 4 LLIDs per ONU
  • 16K MAC addresses table
  • Management through console, Telnet, SNMP or Web management
  • FTP for firmware upgrades
  • Configuration saving and retrieving
  • Overheat detection
  • LED indicators for link status
  • AC/DC power input for redundancy
  • PON port redundancy
  • Hot swappable fan module and PON modules

[adsense]High bandwidth

As demand for broadband services such as high-definition TV (HDTV), media-on-demand (MoD), Voice over IP (VoIP) and online gaming increases continuously, GEPON technology emerges to provide astounding 1.25Gbps bandwidth for both upstream and downstream, giving a 30Mbps bi-directional bandwidth to up to 32 subscribers each. It is a cost-effective access technology with a reliable and scalable carrier-grade Ethernet infrastructure that really addresses Triply Play service needs.

Cost-effective operations beyond initial fiber deployment

Construction of the fiber access network is the most labor-intensive task in FTTX projects and thus the most expensive. However, PON architecture requires less cost since it requires less fiber. PON networks use splitters to allow minimal fiber deployment in local loops. In addition, it requires no power between CO and network’s termination that lead to lowered maintenance costs.

20 km long distance coverage

On a PON network, subscribers must be within 20 km from the CO, depending on the total number of splits (distance decreases as splits increase). The OLT-1308S-22 supports a maximum distance of up to 20 km, and users can choose the different distances ONU type for 20 km deployment to adapt to the existing network structure.

High scalability and flexibility for easy installation and maintenance

Since ONU can be added to or removed from the network architecture easily and economically, its great flexibility is perfect for the deployment of different network architectures. FTTH deploys ONU in residences, while FTTN/FTTC is the combination of fiber and existing copper infrastructure. In addition, administrators can upgrade firmware, test loopbacks and detect failures remotely. [bodyads]

ZyXEL GEPON OLT Specifications:

Standard Compliance

  • IEEE 802.3ah
  • IEEE 802.3ab
  • IEEE 802.3 Ethernet
  • IEEE 802.3u Fast Ethernet
  • IEEE 802.3z Gigabit Ethernet
  • IEEE 802.3x Flow Control
  • IEEE 802.3ad LACP aggregation
  • IEEE 802.1d Spanning tree protocol
  • IEEE 802.1w Rapid spanning tree protocol
  • IEEE 802.1Q VLAN tagging
  • IEEE 802.1p QoS
  • IEEE 802.1X port authentication
  • IEEE 802.11 MIB

MAC and Packet Buffer

  • 16K MAC entries

Traffic Management and QoS

  • IEEE 802.1p QoS with 8 priority queues per port
  • IEEE 802.1Q tag-based VLAN
  • 2K static VLAN, up to 4K dynamic VLAN
  • Supports to GVRP, automatic VLAN member registration
  • IGMP v1 & v2

User Security and Authentication

  • MAC filtering per port, secure access to each port
  • Specific MAC forwarding per port: only specified MAC addresses can access the network (per lock)
  • Limits to the number of MAC address per port
  • 802.1X port-based security that prevent unauthorized client access to the network
  • Private VLAN provides security and isolation between ports on a switch that prevent users to snoop on each others’ traffic
  • VLAN stacking provides CVLAN and SVLAN to help separate different user traffic for security concern and also enable the flexible VLAN usage for users

Network Administration Security

  • User name/Password required for Web/Telnet/local console administrators
  • Two-level security by specific SNMP read/write community
  • SSH provides network security by encryption administration traffic

Network Management

  • Web-based management
  • Telnet CLI
  • SNMP v1, v2c & v3
  • RS-232 local console
  • Out-of-band management
  • NetAtlas PON, EPON manager

Remote ONU Management through OAM Channel

  • Firmware upgrade
  • Configuration/Provisioning
  • Status/Alarm report
  • Loop-back tests

ZyXEL GEPON OLT Hardware Specifications:

  • 2 embedded GEPON ports
  • 3 open slots for GEPON modules, each module supports 2 PON ports.
  • 8 GEPON SFP open slots with DDMI support
  • 1000BASE-PX20 SFP for distance up to 20 km
  • Wavelength: 1.31 um for upstream and 1.49 um for downstream
  • 4 GbE uplinks with 2-port RJ-45 1000BASE-T and 2 combo ports
  • One 10/100BASE-T for out-band management
  • 1 DB9 RS-232 for craft interface
  • 1 alarm input port
  • Power input:
    • AC: 100 V ~ 240 V
    • DC: -48 V
  • Power Consumption:
    • AC: 90Watt max
    • DC: 80Watt max
  • Transceiver:
    • Average output power: 5 dBm
    • Receiver sensitivity: -30 dBm [boxads]

Physical Specifications

  • Item Dimensions (WxDxH): 440 x 312 x 44 mm (17.32” x 12.28” x 1.73”)
  • Item Weight: 4500 g (9.94 lb.)
  • Packing Dimensions: 574 x 460 x 161 mm (22.59” x 18.11” x 6.34”)
  • Packing Weight: 6000 g (13.26 lb.)

Environmental Specifications

  • Operation temperature: 0°C to 45°C (32ºF to 113ºF)
  • Storage temperature: -40°C to 70°C (-40ºF to 158ºF)
  • Operation humidity: 10% ~ 90% (Non-condensing)
  • Storage humidity: Less than 95% RH (Non-condensing)


  • CE-EMC Class A
  • FCC Part15 Class A
  • CSA-International

Product Accessories

  • OFC-1300: Fan module
  • OLC-1302-22: OLT PON module, each module supports two PON ports
  • OPA-1300-DC: DC power module to support -48 V DC

ZyXEL GEPON OLT 1308S-22 Application Diagram:

ZyXEL GEPON OLT 1308S-22 Application Diagram
ZyXEL GEPON OLT 1308S-22 Application Diagram


Hi! I am Shahed Israr. I try to help GPON Technology users with their queries and provide them with relevant and accurate information to the best of my ability. My main goal is to assist and enhance GPON Technology user and help people find the answers they're looking for quickly and easily.

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Hi! I am Shahed Israr. I try to help GPON Technology users with their queries and provide them with relevant and accurate information to the best of my ability. My main goal is to assist and enhance GPON Technology user and help people find the answers they're looking for quickly and easily.

View all posts by Shahed →

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