VSOL 4-Port GPON OLT in Kenya

The VSOL 4-Port GPON OLT, model V1600G0-B, is a professional Layer 3 Optical Line Terminal designed for FTTH, FTTB, FTTO, ISP, enterprise and broadband access networks. It combines four GPON PON interfaces with Gigabit Ethernet and 10 Gigabit SFP+ uplinks in a compact 1U rack-mount chassis, making it suitable for growing fibre operators that require higher subscriber capacity and stronger uplink performance.

Each GPON port supports a maximum 1:128 optical split ratio, giving the four-port platform a theoretical capacity of up to 512 ONT positions. The OLT supports 2.488 Gbps downstream and 1.244 Gbps upstream per GPON interface, transmission distances of up to 20 km, and Class B+, C, C+, C++ and C+++ GPON optical modules. 

The V1600G0-B also includes Layer 3 routing, VLAN and QinQ functionality, DBA, QoS, multicast, DHCP functions, ACLs, IPv6, ONT auto-discovery, remote ONT upgrades, RADIUS, TACACS+, SNMP, WEB, SSHv2 and CLI management. 

Key Specifications

VSOL's current V1600G0-B documentation confirms the four GPON ports, 1:128 splitting, 104 Gbps backplane, 47.616 Mpps forwarding rate, four uplinks and GPON optics ranging from B+ through C+++. 

What Is the VSOL V1600G0-B?

The VSOL V1600G0-B is the central active device installed at an ISP POP, server room or fibre headend to control GPON subscriber connections.

Four GPON PON Ports

The V1600G0-B provides four GPON PON interfaces. 

This gives an ISP flexibility to assign different PON ports to different estates, neighbourhoods, apartment blocks, business customers or future expansion areas.

Subscriber Capacity

Depending on the selected split ratio:

The 512 figure is a theoretical optical endpoint count. Actual network design should consider the optical power budget, ONT registration limits, service bandwidth, subscriber traffic and required performance margin.

1:64 vs 1:128 GPON Splitting

Although the OLT supports up to 1:128, a lower split such as 1:16, 1:32 or 1:64 may provide better optical margin and more capacity per subscriber.

GPON Port Speed

Each GPON PON interface supports approximately:

VSOL lists these speeds in the official V1600G0-B specification. 

The available capacity on each PON is shared among connected ONTs.

20 km Transmission Distance

The VSOL V1600G0-B supports GPON transmission distances of up to 20 km, subject to the overall optical budget. 

Actual distance depends on:

• Fibre attenuation

• PLC splitter loss

• Connector loss

• Adapter loss

• Fusion-splice loss

• GPON optical module class

• ONT receiver sensitivity

• Engineering safety margin

A proper optical power-budget calculation should therefore be completed before deployment.

GPON Operating Wavelengths

The V1600G0-B uses 1490 nm transmit and 1310 nm receive wavelengths. 

Supported GPON Optical Modules

One of the major advantages of the V1600G0-B is its support for several GPON optical classes.

VSOL officially lists all these module classes. 

Higher optical-budget modules can provide additional margin for networks with larger splitter ratios, longer distances or greater passive losses.

GPON C++ and C+++ Modules

The V1600G0-B can be ordered with GPON C++ and C+++ SFP modules as accessories. 

The correct module should be selected according to the calculated optical loss rather than simply choosing the strongest available optic.

Four Uplink Interfaces

The V1600G0-B provides four uplink ports.

The two optical slots can support 1GE SFP or 10GE SFP+ modules. 

10G SFP+ Uplink Support

10G uplinks are particularly valuable where the subscriber base is expected to grow.

They allow the OLT to connect to:

• MikroTik core routers

• Aggregation switches

• Data-centre switches

• ISP backbone networks

• Redundant upstream fibre paths

A 10G uplink provides substantially more headroom than a single Gigabit uplink when several PON ports are carrying active subscriber traffic.

104 Gbps Backplane Bandwidth

These figures are published by VSOL for the V1600G0-B. 

Layer 3 Routing

The V1600G0-B combines OLT functionality with Layer 3 routing capabilities.

It supports:

• Static routing

• RIP v1/v2

• RIPng

• OSPF v2/v3

• ARP Proxy

• IPv6 routing

VSOL specifically describes the platform as combining an L3 router with an L2 OLT and supports dynamic routing for automatic uplink route switching. 

VLAN Support

The OLT supports up to 4096 VLANs. 

An ISP can therefore separate:

• Residential Internet

• Business Internet

• CCTV

• IPTV

• Voice

• Network management

• Enterprise services

T-CONT DBA

GPON uses T-CONT Dynamic Bandwidth Allocation to manage upstream bandwidth between multiple ONTs.

The VSOL V1600G0-B supports T-CONT DBA and GEM port traffic management. 

This helps operators efficiently share upstream PON capacity while supporting different subscriber profiles.

QoS

The OLT supports QoS based on:

• Port

• VLAN ID

• Type of Service

• MAC address

This is useful for prioritizing business Internet, IPTV, VoIP, CCTV or network-management traffic.

ONT Auto Discovery

The V1600G0-B supports:

• ONT auto-discovery

• Link detection

• Online ONT configuration

• Remote software upgrading

• Alarm management

This enables network administrators to provision and maintain subscribers centrally from the OLT.

DHCP Functions

VSOL lists all four functions in the official specification. 

Multicast and IPTV

The OLT supports IGMP Snooping and up to 2,048 multicast groups. 

This makes the platform suitable for multicast applications such as IPTV.

Security Features

VSOL also highlights flexible firewall protection designed to resist different network attacks. 

IPv6 Support

The V1600G0-B supports several IPv6 functions.

Management Options

These options allow both local and remote configuration and monitoring.

Dual Power Options

The V1600G0-B supports flexible power configurations.

Dual-power configurations can improve network availability in ISP POPs and telecommunications rooms.

Power Specifications

Compact 1U Rack Design

The V1600G0-B uses a standard 1U 19-inch rack-mount chassis. 

Its compact design makes it suitable for small and medium ISP POPs as well as full data-centre racks.

VSOL 4-Port GPON OLT vs 2-Port GPON OLT

VSOL 4-Port GPON OLT vs 8-Port GPON OLT

GPON vs EPON

The V1600G0-B complies with ITU-T G.984.x GPON standards. 

Watch VSOL 4-Port GPON OLT

https://youtu.be/uLlQJSRmKbo

The VSOL V1600G0-B 4-Port GPON OLT provides considerably more subscriber density than a typical EPON platform of the same PON-port count. With four GPON ports and support for up to 1:128 optical splitting, the OLT can provide as many as 512 theoretical optical endpoint positions while allowing the operator to divide the network into four independent fibre distribution branches. 

Its uplink architecture also makes the platform suitable for growing ISP networks. Two Gigabit RJ45 interfaces and two SFP/SFP+ interfaces provide a combination of copper and fibre connectivity, including support for 10G uplinks toward MikroTik routers, aggregation switches or ISP backbone equipment. The OLT also provides 104 Gbps backplane bandwidth and Layer 3 dynamic routing capabilities. 

For complete FTTH deployment, Fiber Optics Kenya can supply the VSOL V1600G0-B together with GPON C+ / C++ / C+++ PON modules, GPON/XPON ONTs, PLC splitters, ODFs, FAT boxes, fibre closures, ADSS fibre cables, FTTH drop cables, patch cords, fusion-splicing equipment and fibre testing tools.

Applications of VSOL 4-Port GPON OLT

Small and Medium ISPs

Provides a scalable four-port GPON platform for growing subscriber networks.

FTTH Networks

Suitable for residential fibre broadband deployment.

Residential Estates

Different PON ports can serve separate estate zones.

Apartment Networks

Can support multiple apartment blocks or residential towers.

FTTB Networks

Provides fibre-to-the-building connectivity.

FTTO Networks

Suitable for offices and business customers.

Enterprise Networks

Supports high-capacity passive fibre access across large organizations.

Campus Networks

Four GPON ports can serve different buildings or departments.

Hotels and Resorts

Supports broadband, IPTV and other IP services over fibre.

CCTV Networks

GPON infrastructure can transport large IP-surveillance deployments.

Example Four-Port GPON Network Design

Typical FTTH Architecture

Installation Considerations

Recommended Accessories

Why Buy VSOL 4-Port GPON OLT from Fiber Optics Kenya?

Frequently Asked Questions

What is the VSOL 4-Port GPON OLT?

It is the VSOL V1600G0-B, a four-port Layer 3 GPON Optical Line Terminal for FTTH and fixed broadband networks. 

How many GPON ports does it have?

It has 4 GPON PON ports. 

What is the maximum split ratio?

The maximum specified split ratio is 1:128 per GPON port. 

How many ONTs can it theoretically serve?

At 1:128 across four ports, the theoretical maximum is 512 optical endpoint positions.

What is the downstream GPON speed?

Approximately 2.488 Gbps per PON. 

What is the upstream GPON speed?

Approximately 1.244 Gbps per PON. 

What is the maximum transmission distance?

VSOL specifies up to 20 km. 

What wavelengths does it use?

It uses 1490 nm downstream and 1310 nm upstream.

Which connector does the GPON interface use?

VSOL specifies SC/UPC. 

What type of fibre does it use?

It is specified for 9/125 µm single-mode fibre. 

Does it support GPON C+ optics?

Yes.

Does it support C++ optics?

Yes.

Does it support C+++ optics?

Yes. VSOL lists support from B+ through C+++. 

How many uplink ports does it have?

It provides four uplinks: two Gigabit RJ45 and two SFP/SFP+. 

Does it support 10G SFP+?

Yes. 

What is the backplane bandwidth?

The V1600G0-B is specified at 104 Gbps.

What is the forwarding rate?

Approximately 47.616 Mpps. 

Does it support VLANs?

Yes. It supports up to 4096 VLANs, VLAN translation and QinQ.

Does it support DBA?

Yes. It supports GPON T-CONT DBA. 

Does it support ONT auto-discovery?

Yes. 

Can ONTs be upgraded remotely?

Yes. Remote software upgrading is supported.

Does it support Layer 3 routing?

Yes. Static and dynamic routing are supported. 

Does it support RIP?

Yes, including RIP v1/v2 and RIPng. 

Does it support OSPF?

Yes, including OSPF v2/v3. 

Does it support IPv6?

Yes. IPv6 routing, NDP, ACL and multicast functions are supported. 

Does it support DHCP?

Yes. DHCP server, relay, snooping and Option 82 are supported. 

Does it support SNMP?

Yes.

Does it support WEB management?

Yes.

Does it support CLI?

Yes.

Does it support SSH?

Yes, including SSHv2. 

Does it support RADIUS and TACACS+?

Yes. 

Is it rack mounted?

Yes. It uses a 1U 19-inch standard rack chassis. 

What is the power consumption?

Approximately 35 W.

Does it support AC power?

Yes, 100–240 V AC.

Does it support DC power?

Yes, -36 to -75 V DC on compatible configurations. 

Can it use dual power supplies?

Yes. Configurations include dual AC, dual DC and AC+DC. 

Is it suitable for FTTH?

Yes. VSOL specifically positions the platform for FTTH and fixed broadband deployment. 

Is it suitable for a growing ISP?

Yes. Four GPON ports, 1:128 splitting and 10G uplinks provide substantial room for subscriber growth.

Can it work with MikroTik?

Yes. MikroTik routers can be used upstream for PPPoE, routing, authentication, queues and subscriber bandwidth management.

Is this an EPON OLT?

No. The V1600G0-B is a GPON OLT.

Can EPON-only ONUs work with it?

No. Use GPON-compatible ONTs or verified XPON devices that support GPON operation.

Do you supply GPON ONTs?

Yes. Fiber Optics Kenya can supply compatible GPON and XPON ONTs.

Do you supply GPON SFP modules?

Yes. B+, C+, C++ and other compatible GPON optical modules can be supplied.

Do you supply PLC splitters?

Yes. 1x2, 1x4, 1x8, 1x16, 1x32 and 1x64 splitter options can be supplied.

Do you supply ODFs and FAT boxes?

Yes. Rack ODFs, fibre termination boxes and FAT boxes can be supplied.

Do you supply fibre optic cable?

Yes. Outdoor, ADSS, armoured and FTTH drop cables can be supplied.

Do you supply fusion-splicing tools?

Yes. Fusion splicers, cleavers, strippers and splice-protection accessories can be supplied.

Do you supply fibre testing equipment?

Yes. Optical power meters, PON meters, VFLs and OTDRs can be supplied.

Can you configure the VSOL V1600G0-B?

Yes. Professional GPON OLT configuration, ONT provisioning, VLAN setup, routing, uplink configuration and FTTH network commissioning support is available.

Do you deliver outside Nairobi?

Yes. Fiber Optics Kenya supplies fibre optic products and equipment throughout Kenya.

Contact Fiber Optics Kenya

Fiber Optics Kenya
Lyric House
7th Floor Room S9
Kimathi Street
Nairobi

Phone: +254 704 991 492
Email: info@fibreopticskenya.co.ke

The VSOL V1600G0-B 4-Port GPON OLT provides a powerful and scalable platform for small, medium and growing FTTH networks. Its combination of four GPON ports, up to 1:128 splitting, 2.488 Gbps downstream, 1.244 Gbps upstream, 10G SFP+ uplinks, Layer 3 routing, VLAN, QinQ, T-CONT DBA, IPv6 and centralized ONT management makes it suitable for professional ISP deployments. 

Contact Fiber Optics Kenya for VSOL 4-Port GPON OLTs, GPON SFP modules, GPON/XPON ONTs, PLC splitters, ODFs, FAT boxes, fibre cables, OLT configuration, installation support, testing equipment, bulk orders and nationwide delivery across Kenya.