QSFP-4X10G-LR-S-BCC | Cisco Compatible 40GB Single-Mode Breakout Transceiver - 10km (40GBASE-LR / 4x10GBASE-LR)

Q: Will this work in place of the Cisco QSFP-4X10G-LR-S?
A: Yes. The QSFP-4X10G-LR-S-BCC is engineered to the same QSFP+ MSA and IEEE 802.3ba 40GBASE-PSM4 specifications as the Cisco QSFP-4X10G-LR-S. It operates at 1310nm over single-mode fiber with identical 10km reach and four 10 Gbps lanes. The module is plug-and-play compatible, initializing and performing identically to the OEM transceiver without requiring configuration changes or forcing commands.

Q: Which Cisco platforms support this transceiver?
A: This module is compatible with Cisco platforms featuring QSFP+ ports that support 40GBASE-PLR4 or 4x10G breakout. Compatible platforms include Nexus 9300 and 9500 series data center switches, Catalyst 9300, 9400, 9500, and 9600 series campus switches, and other devices with QSFP+ interfaces supporting 40G Ethernet or 4x10G lane breakout functionality.

Q: What type of breakout cable is required for 4x10G connectivity, and can I mix breakout with native 40G links?
A: For 4x10G breakout, you need a 12-fiber parallel MPO-12 (APC) to 4x duplex LC breakout cable. Each duplex LC output connects to a 10GBASE-LR interface. Note that this module specifically requires APC-polished MPO connectors, unlike other 40G QSFP optics that use PC or UPC connectors. Each lane operates independently at 10 Gbps, allowing you to connect to four separate 10G ports on remote devices. Native 40G links require 12-fiber MPO parallel fiber with MPO-12 female connectors on both ends.

Q: What is the optical power budget and how does it determine the actual reach?
A: This module provides a minimum optical budget of 7 dB. Actual reach depends on fiber quality, connector loss, and splice loss. With typical G.652 single-mode fiber attenuation of approximately 0.4 dB/km at 1310nm and allowing for connector insertion loss, links up to 10km are achievable. For precise link engineering beyond 8km or in environments with older fiber or multiple patch panels, calculate total path loss including connectors and splices to ensure it remains within the 7 dB budget.

Q: Does this module support FEC, and is it compatible with OTU3 applications beyond Ethernet?
A: This module does not support FCoE (Fibre Channel over Ethernet). However, it does support multiple Layer 1 applications including 40G Ethernet at 41.25 Gbps line rate, OTU3 at 43.018 Gbps, OTU3e2 at 44.58 Gbps, and STM-256 at 39.81 Gbps. The four-lane architecture operates across a data rate range of 39.81 to 44.8 Gbps. FEC support depends on the host platform's capabilities; the transceiver itself is transparent to FEC encoding applied by the host equipment.