Kitz Forum

Broadband Related => FTTP Rollout => Topic started by: craigski on January 24, 2022, 08:31:10 AM

Title: Fibre slack on pole?
Post by: craigski on January 24, 2022, 08:31:10 AM

I walked around village at weekend, and noticed a few of the poles with fibre seem to have some an additional bobbin type device that seems to be used to store some 'slack' in fibre. I couldn't work out why only some of the poles have this device? An example below.

Title: Re: Fibre slack on pole?
Post by: craigski on January 24, 2022, 08:46:53 AM

I found this (bottom of page 17), says its an ELM, and brief description, but I'm still curious why/when its used, as only on some of the poles near me.

https://www.millsltd.com/media/mills_physical_infrastructure_access_pia_equipment_catalogue.pdf

Title: Re: Fibre slack on pole?
Post by: Weaver on January 24, 2022, 09:53:11 AM

Is that lit fibre? If so, what is the limit on radius of curvature?

Title: Re: Fibre slack on pole?
Post by: craigski on January 24, 2022, 10:14:10 AM

Yes, its fibre. I have found out its a Fibre Locking Mechanism FLM (not ELM), and I would assume any radius is within spec of cable.

https://www.comtecdirect.co.uk/product/opt-fibre-locking-mechanism-for-ultra-lightweight-overhead-cables/PG6518/820214

"The FLM provides an effective solution that isolates the termination of the fibres, either spliced or connectorised, in the fibre enclosure from the 'in span' environmental loading (ice and winding)"