Cisco QSFP-100G-CWDM4-S Compatible, 100G QSFP28 CWDM4 Transceiver — 2km SMF, 1271–1331nm, Duplex LC
Warranty: Lifetime
Coded for Cisco (Arista / Juniper coding on request). Compatible with Cisco QSFP-100G-CWDM4-S. CWDM4 MSA — pair with another CWDM4 optic at the far end.
Third-party 100G QSFP28 CWDM4 optical transceiver, fully compatible with Cisco QSFP-100G-CWDM4-S, delivering single-mode 100G connectivity up to 2km at lower cost than LR4. — the sweet spot for runs too long for SR4 multimode but shorter than a full 10km LR4. Operates on four CWDM wavelengths (1271 / 1291 / 1311 / 1331nm) multiplexed onto a duplex SMF pair via LC. Hot-pluggable, QSFP28 MSA compliant, DOM/DDM diagnostics. Ideal for spine-to-spine across a large facility, intra-campus 100G, and medium-reach DCI.
Key Specs
- Form factor: QSFP28; Rate: 100Gb/s (4x25G NRZ)
- Media: G.652 SMF; Wavelengths: 1271 / 1291 / 1311 / 1331nm (CWDM4 MSA)
- Reach: 2km; Connector: Duplex LC; Diagnostics: DOM/DDM
- Standards: 100G CWDM4 MSA; SFF-8636/8665; ITU-T G.694.2 CWDM grid (CWDM4 optical spec is the MSA, not IEEE)
- Power: 3.5W max
- Condition: New, third-party compatible
| Platform family | Coding (OEM part it presents as) | Status |
|---|---|---|
| Cisco Nexus 9000/3000, Catalyst 9k (100G) | Cisco QSFP-100G-CWDM4-S | Coded / confirmed |
| Arista 7000 series | Arista QSFP-100G-CWDM4 | Coded / confirmed |
| Juniper QFX series | Juniper QSFP-100G-CWDM4-C / -IT / -ET | Coded / confirmed |
| Mellanox / NVIDIA Spectrum | Coding available on request | — |
EEPROM / Coding Notes
Pre-programmed to present as Cisco QSFP-100G-CWDM4-S. CWDM4 follows the CWDM4 MSA, not an IEEE standard — for guaranteed interop, pair with another CWDM4 MSA optic at the far end (do not mix with LR4; the wavelength plans differ).
Q&A
Q: What is the difference between CWDM4 and LR4?
A: CWDM4 reaches 2km at lower cost; LR4 reaches 10km. Choose CWDM4 when the run is under ~2km and budget matters.
Q: Single-mode?
A: Yes — SMF, duplex LC.
Q: Will it work with an LR4 on the far end?
A: No — match CWDM4 to CWDM4; the wavelength plans differ.
Q: Does it support DOM?
A: Yes.
Coded for Cisco (Arista / Juniper coding on request). Compatible with Cisco QSFP-100G-CWDM4-S. CWDM4 MSA — pair with another CWDM4 optic at the far end.
Third-party 100G QSFP28 CWDM4 optical transceiver, fully compatible with Cisco QSFP-100G-CWDM4-S, delivering single-mode 100G connectivity up to 2km at lower cost than LR4. — the sweet spot for runs too long for SR4 multimode but shorter than a full 10km LR4. Operates on four CWDM wavelengths (1271 / 1291 / 1311 / 1331nm) multiplexed onto a duplex SMF pair via LC. Hot-pluggable, QSFP28 MSA compliant, DOM/DDM diagnostics. Ideal for spine-to-spine across a large facility, intra-campus 100G, and medium-reach DCI.
Key Specs
- Form factor: QSFP28; Rate: 100Gb/s (4x25G NRZ)
- Media: G.652 SMF; Wavelengths: 1271 / 1291 / 1311 / 1331nm (CWDM4 MSA)
- Reach: 2km; Connector: Duplex LC; Diagnostics: DOM/DDM
- Standards: 100G CWDM4 MSA; SFF-8636/8665; ITU-T G.694.2 CWDM grid (CWDM4 optical spec is the MSA, not IEEE)
- Power: 3.5W max
- Condition: New, third-party compatible
| Platform family | Coding (OEM part it presents as) | Status |
|---|---|---|
| Cisco Nexus 9000/3000, Catalyst 9k (100G) | Cisco QSFP-100G-CWDM4-S | Coded / confirmed |
| Arista 7000 series | Arista QSFP-100G-CWDM4 | Coded / confirmed |
| Juniper QFX series | Juniper QSFP-100G-CWDM4-C / -IT / -ET | Coded / confirmed |
| Mellanox / NVIDIA Spectrum | Coding available on request | — |
EEPROM / Coding Notes
Pre-programmed to present as Cisco QSFP-100G-CWDM4-S. CWDM4 follows the CWDM4 MSA, not an IEEE standard — for guaranteed interop, pair with another CWDM4 MSA optic at the far end (do not mix with LR4; the wavelength plans differ).
Q&A
Q: What is the difference between CWDM4 and LR4?
A: CWDM4 reaches 2km at lower cost; LR4 reaches 10km. Choose CWDM4 when the run is under ~2km and budget matters.
Q: Single-mode?
A: Yes — SMF, duplex LC.
Q: Will it work with an LR4 on the far end?
A: No — match CWDM4 to CWDM4; the wavelength plans differ.
Q: Does it support DOM?
A: Yes.