Application console
2 port epon olt jobs become purchase lines
A 2 port epon olt brief starts from the site, not from a catalog photo. Write the building, the split, the power that is already in the rack, and the ONT fleet that must range. LinkScope Sourcing 07 turns those notes into questions plants can answer. It does not design the outside plant and it does not claim a surveyed route.
- Site. Cabinet, MDU basement, campus closet or temporary hut.
- Split. 1:32 or 1:64, and which port is the spare.
- Power. -48 VDC present, or 100-240 VAC only.
- Fiber. Single-mode G.652 to the splitter, SC/APC or the connector already spliced.
Site constraints that change a two-port EPON buy
- A
Small ISP cabinet
Background for a planning scenario: one cabinet serves a street with fewer than 64 homes and the operator wants a spare PON port. Process: the brief states 2 PON ports, EPON rather than GPON, a 1:32 split on port 1, and port 2 dark until a second splitter is spliced. Result: plants quote a two-port EPON chassis and list a second splitter as excluded, so the dark port is not priced as if it were lit.
- B
MDU basement
Count apartments, riser pairs and the rack unit height that is free. A 1U pizza box and a 2U box with a deeper power shelf do not occupy the same rails. Temperature questions for a closed basement often start from an indoor band such as 0 °C to 50 °C. If the room exceeds that, the plant has to state its range. Do not paste an outdoor -40 °C to 65 °C line onto an indoor SKU.
- C
Campus closet
The uplink may be a short run to a building switch. Record whether that jumper is single-mode or multimode, and keep it off the PON face. Impedance and VSWR are radio-cable checks. They do not describe an EPON port. MIMO and channel width belong to a wireless line and should not be copied into this brief.
- D
Temporary hut
A short-term build still needs a destination, a requested date, and a note that the date is for the hut install rather than for a multi-year spare pool. Ask whether the chassis is new or refurbished, and whether the warranty follows the hut or the serial number after the hut is removed.
Single-mode access fiber versus multimode inside the closet
Side A, single-mode: EPON to the subscriber uses single-mode fiber because splitter loss and optical budget are planned on that plant. A 1:32 splitter already consumes a large part of a typical class, so the chassis class has to be stated in dB against that loss, not assumed. Side B, multimode: a closet patch from the OLT uplink to a nearby switch can be multimode if both cages say so. Buying a multimode jumper does not change the PON wavelength. Keep the two purchases on separate lines.
New chassis versus a refurbished two-port unit
Side A, new: license, firmware and support are easier to attach to a current model string. Side B, refurbished: a legacy EPON ONT fleet sometimes ranges only on an older control revision, and a refurbished unit can be the practical line if condition, hours if known, and remaining support are written for that serial. The desk does not grade either side. It keeps them from sharing one price cell.
Documents to attach in words: splitter drawing, ONT model list, rack elevation, power one-line, and the temperature the room actually sees. Delivery stages are document review, shipment, incoming power-up, and a ranging test you define. Continue with the inquiry rows or send the site notes.
Compatibility questions for an installed EPON fleet
Which ONT models must range?
List vendor and model. “EPON ONT” is not a test target. Ask the plant whether DBA and FEC settings are required for those models, and whether a firmware pair is known. Host compatibility remains a supplier statement until you run the ranging test you specified.
What optical numbers are in the class?
Ask for transmit power and receiver sensitivity in dBm and for the optical budget in dB on the two ports. A family page that only says “class B” is incomplete if B and B+ differ by several decibels in public discussion. The plant maps the label to its table.
What must not be imported from other telecom lines?
Power over Ethernet budgets, runtime of a UPS, and antenna gain are real telecom questions on other buys. They are noise on a 2 port epon olt line unless you are also buying a rectifier, a battery plant or a radio. If you are, give them separate lines and separate suppliers when the quotations come from different plants.
Who accepts the site?
Name the person who signs the port map and the person who signs the incoming check. This page does not replace that sign-off. Measurement accuracy of a handheld power meter is the meter’s calibration question, tracked separately from the chassis datasheet.
Describe the site bill in the form
There is no file upload. Write the 2 port epon olt scope, splitter ratio, power, quantity, US destination and requested timing in the box. If a drawing exists, name it and say which revision the plant should follow. A later message can carry the file on the work email you provide.
Optional budget still needs a currency and a per-chassis or whole-order basis. Supplier preference is high-end, mid-range, budget or undecided. It does not rank plants.