SJ-OTB-M21 Specifications
| Model | SJ-OTB-M21 |
| Type | Patch panel fiber optic, drawer type |
| Rack space | 3U, 19 inch |
| Capacity | 144 cores, SC/APC or SC/UPC duplex |
| Splice tray capacity | 12 fibers / tray; 24 fibers / tray |
| Adapters | FC, SC, ST, LC adapter options |
| Material | Cold-rolled steel |
| Dimension | 19″ × 3U × 400 mm |
| Operating temperature | −40 °C to +70 °C |
Key Features
- 144 cores in 3U — 144-fiber density in three rack units, one less than a 4U modular frame.
- Full drawer access — every splice tray slides out for splicing and inspection, even at 144 cores.
- Duplex standard — SC/APC or SC/UPC duplex adapter rows; FC, SC, ST, LC options.
- Flexible tray loading — 12 or 24 fibers per tray to match cable construction.
- Deep 400 mm chassis — working room for large-count cables and slack.
- Rated −40 °C to +70 °C — covers unheated distribution rooms.
Where the SJ-OTB-M21 Fits
- Distribution rooms — 144-fiber termination with sliding access to every tray.
- FTTH mainframes — dense feeder-to-drop termination in 3U.
- High-touch high-density sites — frequent adds, moves and changes on 144 fibers.
Prefer a modular 4U frame? See the BWN-ODF-144-A or 144-C. Need 288 cores? See the SJ-OTB-M22 5U. Browse our ODF optical distribution frames and the full fiber patch panel range.
Installation Notes
- Mount the panel in any standard 19-inch rack (3U); leave front clearance for the trays to slide fully out.
- Splice tray by tray: 12 or 24 fibers per tray, sleeves seated, slack coiled with controlled bends.
- Label each tray and port row before patching — 144 unlabeled fibers is a maintenance trap.
144-Core Options in the Range
| M21 (this model) | ODF-144-A | ODF-144-C | |
|---|---|---|---|
| Form | 3U drawer type | 4U modular, 400 mm deep | 4U modular, 340 mm deep |
| Capacity | 144 cores SC/APC·SC/UPC duplex | 144 cores SC/UPC duplex | 144 fibers SC/UPC duplex |
| Best for | Sliding access at 144 cores | Modular deep-chassis builds | Modular standard-depth builds |
Full range: fiber patch panel range
