BOM WORKFLOW
gpon epon onu
A gpon epon onu line on a bill of materials is two families until the PON type is chosen. GPON follows the ITU-T G.984 discussion buyers already use for framing and management. EPON follows the IEEE 802.3 point-to-multipoint discussion. The wavelengths people quote are often similar. The framing, the line rate, and the management path are not. LinkScope Sourcing 09 keeps those lines apart so a quotation cannot slide from one family to the other without a written deviation.
Trace columns for every BOM line
| Column | What to write | What a mismatch means |
|---|---|---|
| PON family | GPON or EPON, not a blended label. | The OLT port you already own may reject the other family. |
| Line rate | Ask whether a GPON offer is using the often-cited 2.488 / 1.244 Gbit/s pair, or another rate. Ask the EPON offer for its rate in the same units. | A shared “gigabit” word can hide different optical rates. |
| Wavelength | Upstream, downstream, and any 1550 nm overlay, in nanometres, from the model sheet. | An overlay port is a different BOM line from an ONU that carries no RF video. |
| Optical class | The class name and the loss budget in dB the sheet ties to that class. A 28 dB B+ figure is a public talking point, not this desk’s test. | A shorter class can fail after the same splitter. |
| UNI and voice | Port count, port speed, and POTS count. Confirm a “4 2” faceplate against the sheet. | A cheaper line with fewer voice ports is a different product. |
| Evidence | Datasheet revision, and any authorization file for the exact model. | A photo or a family page does not fill this column. |
Single-mode fiber is the plant these access units are usually written against. If a line was copied from a multimode transceiver bid, mark it and remove it from the ONU comparison. Optics economics for a short data-hall link do not set the loss budget of a splitter-fed drop.
Open choices before you accept an alternative
Will the OLT speak to this family?
Write the OLT vendor, the port type, and the software release. Ask the ONU supplier which releases they have actually answered. Host compatibility is that pair. It is not a connector photo, and this desk does not certify the pair.
Is the alternative the same optical class?
If a factory offers a different class, put the loss budget in dB beside the original class. Include splitter loss and the measured or designed drop loss if you have it. Do not average the two prices while the class differs.
Does management stay in the same family?
GPON buyers often ask about OMCI. EPON buyers often ask about a different operations path. Switching families to chase a unit price also switches the management work your team keeps. That is a lifecycle cost, even when the enclosure looks the same.
Which commercial fields are still blank?
Currency, per-unit or whole-order basis, Incoterm, freight, duties, accessories, and the lead-time anchor. Leave a blank cell blank. An invented number will make the side-by-side look finished when it is not.
Start the rows from the inquiry cards, then send them through the brief form. Standards pages checked on 2026-10-27 are question sources. They do not approve a substituted model.
Submit the BOM rows for factory quotes
Paste one row per ONU line. Mark GPON and EPON as separate lines even when the faceplates look alike. The form has no upload slot; a spreadsheet can follow the opening reply if you say it is coming.