GLC-EX-SMD-BCC | Cisco Compatible 1GB Single-Mode ER - 40km (1000BASE-EX)

Q: Will this work in place of the Cisco GLC-EX-SMD?
A: Yes. The GLC-EX-SMD-BCC is fully compatible with the Cisco GLC-EX-SMD. It conforms to the 1000BASE-EX standard, operates at 1.25 Gbps over single-mode fiber with a 1310nm wavelength, and uses the SFP form factor. The module is plug-and-play in any Cisco device that specifies the GLC-EX-SMD.

Q: Which Cisco platforms support this transceiver?
A: Any Cisco switch, router, or network appliance with a Gigabit Ethernet SFP slot that supports 1000BASE-EX will accept this module. This includes catalyst switches, ASR and ISR routers, and nexus platforms with GbE SFP ports. Confirm your platform datasheet lists 1000BASE-EX or GLC-EX-SMD compatibility.

Q: What fiber type and distance does this support?
A: This module requires standard single-mode fiber (SMF, typically 9/125 µm) and reaches up to 40km. The 1310nm DFB laser provides sufficient link budget for extended reach applications. For links shorter than a few kilometers or back-to-back connections, insert a 5dB inline optical attenuator at each receiver to avoid saturating the PIN photodetector.

Q: How do I access the Digital Optical Monitoring data?
A: The module implements the SFF-8472 MSA for DOM. Use your switch CLI (Cisco IOS show interfaces transceiver, NX-OS show interface transceiver details) or SNMP to read the five monitored parameters: transmit optical power, receive optical power, module temperature, laser bias current, and supply voltage. These values update in real time and can feed into monitoring tools for threshold alarms.

Q: Can I hot-swap this module, or must I power down the switch first?
A: The SFP form factor is hot-swappable by design. You can insert or remove this module from a live port without powering down the chassis or affecting adjacent interfaces. Cisco IOS and NX-OS will detect the module insertion and bring the link up automatically once fiber is connected. No reboot or manual interface reset is required.