Independent sourcing partner for Fiber Optic Equipment · factory quotations compared on the same wavelength, fiber, reach, host, and destination

EXACT-MODEL EVIDENCE

wholesale cwdm sfp module

A wholesale cwdm sfp module decision is a document check, not a carton photo. This guide lists the cells a buyer should close before an alternate wavelength or an alternate EEPROM is accepted. LinkScope Sourcing 02 does not test the module and does not rank factories.

Evidence tray with unlabeled CWDM modules and blank datasheet tabs

Cells that stay open until a document names the model

  1. Grid and nominal wavelength

    Ask whether the offer follows 20 nm CWDM spacing and which of 1271 nm to 1611 nm it actually is. Write one nanometer value. A range such as “upper CWDM” hides a mux slot. Water-peak fiber limits the lower band; say if the plant is G.652.D or an older fiber that should stay at 1471 nm and above.

  2. Optical budget versus route loss

    Collect minimum transmit power, receiver sensitivity, and overload. Add mux insertion loss and connectors. A worked check: 3 dB mux loss, 1.5 dB of patches, and 8 dB of fiber is 12.5 dB before margin. If the module budget on the datasheet is 11 dB, the route does not close, regardless of the carton price.

  3. DOM bytes and temperature

    If monitoring matters, ask for temperature, voltage, bias current, Tx power, and Rx power, and which host command reads them. Pair that with the case-temperature window: 0 °C to 70 °C versus −40 °C to 85 °C. A commercial part in an outdoor cabinet is a deviation, not a footnote.

  4. EEPROM and condition

    Record the host platform and software release. Ask whether the identity bytes are the OEM code that platform expects or a generic MSA identity. Separate new-build from a pulled module by stating condition, warranty months, and whether the code was rewritten. A matching LC latch is not that evidence.

Choices that remain open, and how to treat an alternate

Single-mode CWDM versus a grey multimode optic

CWDM on this page assumes single-mode fiber and a mux. An 850 nm multimode SFP can be the right part for a short hall and the wrong part for a colored metro lateral. Keep the two in different columns. Do not let a lower multimode figure replace a missing 1551 nm channel.

Ask: fiber mode, nm, mux slot, loss sum, host release, new or pulled.

OEM-coded versus compatible

OEM coding may align with a vendor support policy. A compatible code may be acceptable when that exact host has been accepted by the buyer's change process. Neither statement is proven by a wavelength match. Request the coding note tied to the part code, and keep warranty language next to it.

Reject a substitute that changes nm, rate, or EEPROM without a new row.

What a standard page does not do

ITU-T G.694.2 is a wavelength-grid question source. IEEE 802.3 describes grey Gigabit Ethernet reaches, not your mux. A public ITU optical-fibre recommendation page checked on 2026-10-27 does not certify the module a factory names next week. FCC equipment-authorization rules may apply to some intentional radiators and not to this passive optical question. Ask the supplier which document, if any, attaches to the exact model.

Bind every claim to manufacturer + model + date of the datasheet.

The route context sits on the application page. Send the closed cells through the RFQ desk or start from the inquiry rows.

Request an evidence review, not a catalog download

There is no line-card file on this page. Paste the channel list, the host, the quantity, and the destination. The desk will ask factories for documents tied to those lines. It will not invent a datasheet.

Please enter your name.
Please enter a valid work email.
Please enter your company.
Describe the specification, quantity, destination, and delivery timing.

Submitting lets the desk review the brief and contact factories. Read the Privacy Policy. Stock, price, compatibility, and compliance stay unconfirmed until a named supplier answers the exact module.