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LMJ for Telecoms
High-count jointing in the chamber.
The Large Mass Joint (LMJ) is a re-enterable splice closure for high fibre counts — multiple trays and generous slack storage for main trunk and distribution jointing.
At a glance
| Specification | Value |
|---|---|
| Type | Large mass joint |
| Seal | Mechanical, re-enterable |
| Capacity | High fibre counts, multi-tray |
| Mount | Underground / aerial |
- UK WarehousedSame-week dispatch
- In-house engineersTechnical specs & support
- End-to-end BOM fulfilmentKitted, staged, delivered
- 120+ network buildersTrust Altnets to deliver
Key features
Built for how it gets installed.
LMJ is one of the 22 cable types we carry across our Enclosures range — chosen for the way you actually deploy.
High fibre count capacity
Multiple splice trays
Re-enterable mechanical seal
Generous slack storage
Why Altnets
The clever choice for network builders.
Deep UK stock
300,000+ sqft of warehousing and 4,000+ pallet positions — same-week dispatch on most line items.
Engineers, not order-takers
In-house technical team to validate specs, propose alternatives and de-risk your build before it ships.
BOM, kitted & staged
Multi-vendor consolidation, phased deliveries and project staging built into every order.
UK & worldwide reach
Air, sea and road freight with full export documentation and flexible incoterms for global rollouts.
Applications
Where lmj earns its keep.
Trunk and backbone jointing
Carriageway chambers
Metro fibre routes
Network expansion
Have a question?
Let's get your network moving.
Tell us what you're building. We'll come back with a quote, lead times, and a plan.
- [email protected]
- +44 (0) 20 3997 8994
- Brighton · United Kingdom
More Enclosures
Other cable types
AFN
Aerial fibre node for the last mile.
Tenio
Modular single-ended splice closure.
CFN
Compact node for high drop counts.
BUDI Box
Below-ground distribution interface.
Cableloks
Mechanical cable seal, no heatshrink.
CCE
External building entry and test point.
CCP
Compact customer connection point.
CCP XL
Higher-capacity customer connection point.
CMJ
Compact re-enterable mass joint.
CNC
Weatherproof cable network closures.
CWB
Building entry point on the wall.
FDN
Distribution node for built-up areas.
FFE
Facade-mounted fibre connection point.
FIST MSC
Modular splice closure that adapts.
HST
Hardened terminals for every deployment.
MCCE
Building entry for up to 12 customers.
MDU Series
Last-mile enclosures for MDUs.
MMJ
The mid-size mass joint.
Mounting Brackets
Secure support for enclosures and boxes.
OTE
Plug-and-play optical termination.
Port Opening Tools
Open closure ports safely.