VSOL 8-Port GPON OLT in Kenya

The VSOL 8-Port GPON OLT, commonly represented by the V1600G1-B, is a professional Layer 3 Optical Line Terminal designed for medium and large FTTH, FTTB, FTTO, ISP, enterprise and broadband access networks. It provides eight independent GPON interfaces together with Gigabit Ethernet and 10 Gigabit uplinks, allowing an operator to manage a large subscriber base from a compact 1U platform. 

Each GPON port supports a maximum 1:128 optical split ratio. The platform provides the standard GPON line rates of approximately 2.488 Gbps downstream and 1.244 Gbps upstream, supports transmission distances of up to 20 km, and works with GPON optical-module classes from B+ through C+++. 

The V1600G1-B also combines its GPON access functionality with Layer 3 routing, VLANs, QinQ, T-CONT DBA, multicast, DHCP services, ACLs, IPv6, RADIUS, TACACS+, ONT auto-discovery and multiple management methods. VSOL has since introduced the newer V1600G1-R as the cost-effective successor to the V1600G1-B, adding a 240 Gbps backplane and more flexible 10G-capable uplinks, but the V1600G1-B remains an important and widely deployed 8-port VSOL GPON platform. 

Key Specifications

VSOL's official documentation confirms eight GPON ports, four GE RJ45 uplinks, two 1GE SFP ports, two 10GE SFP+ interfaces, 104 Gbps switching capacity and a 1:128 maximum split ratio. 

What Is the VSOL V1600G1-B?

The V1600G1-B is installed at the service-provider side of a GPON network and manages subscriber ONTs through the passive Optical Distribution Network.

Eight GPON Ports

The OLT provides eight independent GPON interfaces, allowing an ISP to split its fibre network into several distribution zones. 

Subscriber Capacity

At different split ratios:

The 1,024 figure is a theoretical optical endpoint count, calculated from eight ports at the maximum supported 1:128 split. Actual subscriber design should also consider optical loss, ONT registration limits, aggregate traffic, package speeds and uplink capacity. The official V1600G1-B specification confirms a maximum split ratio of 1:128 per GPON port. 

1:64 vs 1:128 Splitting

Although 1:128 is supported, 1:16, 1:32 or 1:64 may be preferable where the operator wants better optical margin and fewer subscribers sharing a PON.

GPON Port Speed

Each GPON interface provides the standard GPON line rate:

These rates are specified in VSOL's V1600G1-B datasheet. 

The bandwidth on each PON is shared among the connected ONTs.

20 km Transmission Distance

VSOL specifies a maximum GPON transmission distance of 20 km. 

Actual usable distance depends on:

• Fibre attenuation

• PLC splitter insertion loss

• Fusion-splice loss

• Connector and adapter losses

• Optical-module class

• ONT receiver sensitivity

• Engineering safety margin

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

GPON Operating Wavelengths

VSOL lists 1490 nm TX and 1310 nm RX for the V1600G1-B. 

Supported GPON Optical Modules

The V1600G1-B supports multiple optical-budget classes.

This wide optical-module support allows operators to select optics according to splitter loss and network reach. 

GPON C++ and C+++ Modules

VSOL specifically lists C++ and C+++ GPON SFP modules among the available accessories for the V1600G1-B. 

The strongest optic should not automatically be selected; the correct choice should follow the calculated optical loss.

Eight Uplink Interfaces

The V1600G1-B provides a particularly flexible uplink configuration.

This configuration is confirmed by VSOL's official product page and datasheet. 

10G SFP+ Uplinks

The two 10GE SFP+ interfaces are important for an OLT that may serve several hundred active subscribers.

They can connect the OLT to:

• MikroTik core routers

• Aggregation switches

• Data-centre switches

• ISP backbone routers

• Redundant fibre uplinks

A 10G uplink provides considerably more traffic headroom than a single Gigabit uplink.

104 Gbps Backplane Bandwidth

VSOL's current V1600G1-B product table lists 104 Gbps backplane capacity, while official datasheet revisions show forwarding values around 65.472 to 68.448 Mpps. 

Layer 3 Routing

The VSOL V1600G1-B combines Layer 2 OLT functions with Layer 3 routing.

Supported routing functions include:

• Static routing

• RIP v1/v2

• RIPng

• OSPF v2/v3

• ARP Proxy

• IPv6 routing

VSOL describes the platform as an L3 router + L2 OLT, with dynamic routing used to protect uplink data transmission. 

VLAN Support

The OLT supports up to 4096 VLANs. 

This makes it possible to separate:

• Residential Internet

• Business Internet

• IPTV

• CCTV

• VoIP

• Management traffic

• Enterprise customers

T-CONT Dynamic Bandwidth Allocation

GPON uses T-CONT DBA to dynamically assign upstream bandwidth among subscriber ONTs.

The V1600G1-B supports both T-CONT DBA and GEM port traffic management. 

This helps operators provide different subscriber packages while efficiently sharing the PON upstream capacity.

QoS Support

The V1600G1-B supports QoS classification based on:

• Port

• VLAN ID

• TOS

• MAC address

This is useful for giving higher priority to business traffic, voice, IPTV or network-management services.

ONT Auto Discovery and Remote Management

The OLT supports:

• ONT auto-discovery

• Link detection

• Online ONT configuration

• Remote software upgrades

• User management

• Alarm management

Centralized management reduces the amount of field configuration needed when adding new FTTH subscribers.

DHCP Features

VSOL lists all these DHCP capabilities for the V1600G1-B. 

Multicast and IPTV

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

This allows efficient delivery of multicast services such as IPTV.

Security Features

VSOL also promotes flexible firewall policies for protecting the platform against network attacks. 

IPv6 Support

The V1600G1-B supports several IPv6 features.

Management Options

VSOL has also refreshed the web interface for its GPON OLT series, with an updated WebUI introduced in late 2025 to simplify common configuration workflows. 

Dual Power Supply Options

The V1600G1-B supports several power configurations.

The supported AC range is approximately 100–240 V AC, while DC configurations support around -36 to -75 V DC. 

45 W Power Consumption

The V1600G1-B consumes approximately 45 W. 

For ISP installations, it is recommended to provide:

• UPS backup

• Surge protection

• Proper grounding

• Stable AC or DC supply

• Adequate rack ventilation

1U Rack-Mount Design

The compact format is suitable for ISP POPs, server rooms, estate network rooms and telecom racks.

VSOL V1600G1-B vs New V1600G1-R

VSOL introduced the V1600G1-R as the newer replacement generation for the V1600G1-B.

The newer R-series improves internal switching performance and uplink flexibility while retaining the same eight-port GPON access architecture. 

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

VSOL 8-Port GPON OLT vs 16-Port GPON OLT

GPON vs EPON

The V1600G1-B complies with GPON standards in the ITU-T G.984 family. 

Watch VSOL 8-Port GPON OLT

https://youtu.be/YD5CQLOJWNQ

The VSOL V1600G1-B 8-Port GPON OLT offers substantially more access capacity than a 2- or 4-port GPON platform. Eight PON interfaces allow the operator to separate subscribers into multiple fibre distribution zones, while support for 1:128 splitting provides a very high theoretical endpoint density. The OLT also supplies 2.488 Gbps downstream and 1.244 Gbps upstream per GPON interface. 

Its uplink architecture is equally important for a growing ISP. Four Gigabit RJ45 ports, two Gigabit SFP slots and two 10GE SFP+ interfaces provide several options for connecting the OLT to MikroTik routers, aggregation switches and backbone fibre infrastructure. Layer 3 routing, VLANs, QinQ, DBA and IPv6 further increase the flexibility of the platform. (Vsolcn)

For complete GPON deployment, Fiber Optics Kenya can supply the VSOL 8-Port GPON OLT together with GPON optical modules, GPON/XPON ONTs, PLC splitters, ODFs, FAT boxes, fibre closures, ADSS and armoured fibre cables, patch cords, fusion-splicing equipment and PON testing tools.

Applications of VSOL 8-Port GPON OLT

Medium and Growing ISPs

Eight PON interfaces provide substantial capacity for residential and commercial subscriber expansion.

FTTH Networks

The OLT can serve several FTTH distribution branches from a single central POP.

Residential Estates

Separate PON interfaces can serve individual estate zones.

Apartment Developments

Different PON ports can be allocated to apartment blocks or towers.

FTTB Networks

The platform can provide fibre-to-the-building access for commercial and residential developments.

FTTO Networks

Business customers can be connected through dedicated GPON branches.

Enterprise Networks

The OLT is suitable for passive optical LAN applications in large organizations.

Campus Networks

Eight PON ports provide flexibility for connecting several buildings.

Hotels and Resorts

GPON can transport broadband, IPTV, VoIP and other IP services.

CCTV Networks

The passive optical network can also carry large IP surveillance deployments.

Example 8-Port GPON Network Design

Typical FTTH Architecture

Installation Considerations

Recommended Accessories

Why Buy VSOL 8-Port GPON OLT from Fiber Optics Kenya?

Frequently Asked Questions

What is the VSOL 8-Port GPON OLT?

The VSOL 8-Port GPON OLT is a Layer 3 GPON Optical Line Terminal with eight PON interfaces, commonly represented by the V1600G1-B platform.

How many GPON ports does it have?

It has 8 GPON ports. 

What is the maximum split ratio?

The maximum supported split is 1:128 per GPON port. 

How many ONTs can it theoretically serve?

At eight ports and 1:128 splitting, the theoretical maximum is 1,024 optical endpoint positions.

How many ONTs can it serve at 1:64?

At 1:64 across eight ports, the theoretical total is 512 endpoints.

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 fibre distance?

VSOL specifies up to 20 km.

What wavelengths does it use?

It uses 1490 nm downstream and 1310 nm upstream. 

What connector does it use?

VSOL specifies SC/UPC on the PON interface. 

What fibre type does it use?

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

Does it support Class B+ optics?

Yes.

Does it support C+ optics?

Yes.

Does it support C++ optics?

Yes.

Does it support C+++ optics?

Yes. VSOL lists B+, C, C+, C++ and C+++ optical classes. 

How many uplinks does it have?

The V1600G1-B provides eight uplink interfaces: four GE RJ45, two 1GE SFP and two 10GE SFP+. 

Does it support 10G uplinks?

Yes. It has two 10GE SFP+ uplinks. 

What is its backplane bandwidth?

The V1600G1-B has 104 Gbps of backplane bandwidth. 

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 VLANs?

Yes. Up to 4096 VLANs are supported. 

Does it support QinQ?

Yes. 

Does it support T-CONT DBA?

Yes. 

Does it support ONT auto-discovery?

Yes.

Can ONTs be upgraded remotely?

Yes. Remote software upgrading is supported. 

Does it support DHCP Snooping?

Yes.

Does it support DHCP server and relay?

Yes.

Does it support DHCP Option 82?

Yes. 

Does it support multicast?

Yes. IGMP Snooping and up to 2,048 multicast groups are supported.

Does it support IPv6?

Yes. The platform supports IPv6 routing, NDP, ACLs, RIPng, OSPFv3 and MLD Snooping. 

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 standard 1U 19-inch chassis. 

What are the dimensions?

Approximately 442 × 319 × 43.6 mm. 

What is the power consumption?

Approximately 45 W. 

Does it support AC power?

Yes, approximately 100–240 V AC. 

Does it support DC power?

Yes, approximately -36 to -75 V DC. 

Can it use redundant power?

Yes. Single AC, dual AC, dual DC and AC+DC configurations are supported.

Is there a newer VSOL 8-port GPON model?

Yes. VSOL has introduced the V1600G1-R as the newer successor to the V1600G1-B, with 240 Gbps backplane bandwidth and four flexible SFP/SFP+ uplinks. 

Is it suitable for FTTH?

Yes. FTTH and fixed broadband are primary applications of the platform. 

Is it suitable for a growing ISP?

Yes. Eight GPON ports, 10G uplinks and Layer 3 routing make it suitable for medium and growing ISP networks.

Can it work with MikroTik?

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

Is it an EPON OLT?

No. The V1600G1-B is a GPON OLT.

Can EPON-only ONUs work with it?

No. Use GPON-compatible ONTs or properly verified XPON devices operating in GPON mode.

Do you supply GPON ONTs?

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

Do you supply GPON optical modules?

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

Do you supply 10G SFP+ modules?

Yes. Compatible 10G uplink modules can be supplied.

Do you supply PLC splitters?

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

Do you supply ODFs?

Yes. Rack-mounted and wall-mounted ODFs can be supplied.

Do you supply FAT boxes?

Yes. Empty and loaded FTTH FAT boxes can be supplied.

Do you supply fibre optic cables?

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

Do you supply fusion-splicing equipment?

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 8-Port GPON OLT?

Yes. Professional GPON OLT configuration, ONT provisioning, VLAN setup, routing, uplink configuration and FTTH 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 8-Port GPON OLT provides a scalable platform for medium and growing fibre operators that require significantly more capacity than 2- or 4-port systems. The established V1600G1-B combines eight GPON ports, 1:128 splitting, 2.488 Gbps downstream, 1.244 Gbps upstream, two 10GE SFP+ uplinks, Layer 3 routing, 4096 VLANs, QinQ, T-CONT DBA, multicast, IPv6 and centralized ONT management in a compact 1U chassis. 

For new deployments, the newer V1600G1-R is also worth considering because it retains eight GPON ports while increasing the backplane to 240 Gbps and providing four flexible SFP/SFP+ optical uplinks. 

Contact Fiber Optics Kenya for VSOL 8-Port GPON OLTs, GPON PON modules, GPON/XPON ONTs, 10G SFP+ modules, PLC splitters, ODFs, FAT boxes, fibre optic cables, professional OLT configuration, installation support, testing equipment, bulk orders and nationwide delivery across Kenya.