This data sheet provides a comprehensive technical overview of the Cisco GLC-BX-D20 and GLC-BX-U20 Bi-Directional (BiDi) SFP transceivers, including all high-performance variants available exclusively at SKYRS Pakistan.
The Cisco 1000BASE-BX-20D and 1000BASE-BX-20U are Small Form-Factor Pluggable (SFP) transceivers designed for single-strand, single-mode fiber (SMF) connectivity. By utilizing Wavelength Division Multiplexing (WDM), these modules allow for simultaneous transmit and receive functions on a single fiber strand, effectively doubling the fiber capacity of your existing infrastructure.
| Feature | GLC-BX-U20 (Upstream) | GLC-BX-D20 (Downstream) |
| Wavelength (TX) | 1310 nm | 1490 nm |
| Wavelength (RX) | 1490 nm | 1310 nm |
| Data Rate | 1.25 Gbps | 1.25 Gbps |
| Max Distance | 20 km (12.4 miles) | 20 km (12.4 miles) |
| Fiber Type | Single-Mode Fiber (SMF) | Single-Mode Fiber (SMF) |
| Connector | Simplex LC | Simplex LC |
| DOM Support | Yes (Digital Optical Monitoring) | Yes (Digital Optical Monitoring) |
At SKYRS, we maintain a robust inventory of 20km BiDi optics to suit various environmental and hardware requirements:
GLC-BX-D20 / GLC-BX-U20 (Commercial): Standard operating temperature range (0°C to 70°C) for indoor data centers.
GLC-BX-D20-I / GLC-BX-U20-I (Industrial): Ruggedized variants supporting -40°C to 85°C, ideal for outdoor enclosures or harsh industrial sites in Pakistan.
GLC-2BX-D / GLC-2BX-U (Compact): High-density variants that integrate two BiDi interfaces into a single SFP slot (requires compatible hardware).
Distance Scaling: Complementary 10km (BX10), 40km (BX40), and 80km (BX80) variants are also stocked for longer metropolitan links.
SKYRS offers specialized deployment services to ensure your single-fiber links are stable and efficient:
Paired Deployment: BiDi modules must be used in pairs. A GLC-BX-U20 at one end must always be connected to a GLC-BX-D20 at the other.
Fiber Verification: SKYRS technicians perform OTDR (Optical Time-Domain Reflectometer) testing to ensure the single fiber strand is free of significant splices or micro-bends that impact 20km transmission.
Port Insertion: Hot-swappable installation into SFP/SFP+ ports. We ensure the protective dust caps are only removed at the moment of connection to prevent contamination.
Simplex LC Patching: We provide the necessary Simplex LC-to-LC or Simplex LC-to-SC patch cords to match your existing ODF (Optical Distribution Frame) patch panels.
Correct software configuration is vital for long-distance link reliability. SKYRS provides the following specialized setup:
DOM/DDM Monitoring: Configuration of real-time monitoring to track laser output power, temperature, and supply voltage directly from the switch CLI.
Service Unsupported-Transceiver: Enabling Cisco-compatible high-performance optics in the IOS/NX-OS environment to ensure 100% uptime.
MTU and Speed Tuning: Hard-coding speed and duplex settings for legacy media converter links or configuring Jumbo Frames for high-speed trunking.
Error Reporting: Setting up SNMP traps for optical power loss (LOS) to alert administrators before a link fails.
Exclusivity: Technical consultation and on-site link certification are available exclusively for SKYRS customers across Karachi, Lahore, and Islamabad.
Are you seeking the best cisco equipment for your growing business? Skyrs stands as the premier cisco equipment series distributor Pakistan. We provide high-performance solutions for modern enterprises. Our inventory features Branded used Cisco switches for various industries. We serve Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad, and Peshawar. Customers can choose from Refurbished Cisco switches or a competitive Cisco box pack price.
The cisco GLC-BX-D20/U20 modules provide bidirectional communication over a single fiber strand. They operate on WDM technology to maximize your existing cable plant efficiency. Review the cisco GLC-BX-D20/U20 throughput limit in the official datasheet. These modules ensure a seamless cisco Migration for high-speed data environments.
Capacity: Access the cisco Switches cisco GLC-BX-D20/U20 datasheets download for full specs.
Upgrades: Perform a cisco EHWIC-3G-HSP memory upgrade to improve modular router efficiency.
Maintenance: Our team assists with the cisco EHWIC-3G-HSP ROMMON update process.
Licensing: Enable advanced features via cisco GLC-BX-D20/U20 security license activation.
Timeline: Plan ahead for the cisco GLC-BX-D20/U20 EOSL date 2025.
Costing: Request the cisco GLC-BX-D20/U20 used price 2026 for your next project.
Skyrs is the only vendor in Pakistan with specialized equipment for call center call centre in Pakistan. Our routing cisco equipment ensures crystal-clear voice and data transmission. We support high-density environments for software houses using Zoom and RingCentral. We provide used cisco switches in Karachi, Quetta, and KPK regions. Skyrs guarantees the best cisco price in Pakistan for all fiber modules.
The cisco GLC-BX-D20/U20 outperforms brands like Mikrotik, H3C, Aruba, Ruijie, Huawei, and Palo Alto. While Huawei offers similar modules, Cisco provides superior signal integrity over longer distances. Mikrotik provides affordable routing but lacks Cisco’s enterprise-grade optical redundancy. Furthermore, Aruba focuses primarily on wireless, making Cisco the preferred choice for fiber cisco Migration. Consequently, Cisco remains the gold standard for secure, modular wide-area networking.
Q: Where can I Buy cisco equipment Lahore/Islamabad? A: Skyrs offers direct delivery and expert installation in both major cities.
Q: How to reset cisco equipment and fiber modules? A: Use the switch console to clear the interface configuration or hardware reset.
Q: What is the cisco GLC-BX-D20/U20 PoE power budget? A: These SFP modules are for data transmission and do not consume PoE.
Q: Can I get a cisco GLC-BX-D20/U20 bulk quote? A: Yes, we offer special volume discounts for data center rollouts.
Q: Is there a cisco GLC-BX-D20/U20 rack mount kit download? A: SFPs insert into switch ports directly and do not require rack kits.
Product Resources:
Manufacturer Link: Cisco SFP Transceiver Official Page
Internal Link: Cisco SFP Modules at Skyrs.com.pk
Tags: #CiscoPakistan #FiberNetworking #CiscoSFP #CallCenterTech #RefurbishedCisco #CiscoKarachi #CiscoLahore
