Cable Forum - View Single Post - 50M virgin media are replacing all the green boxes in my area

Sephiroth · 12-01-2012, 19:47

The cabs (apart from optical nodes) house amplifiers. These amplifiers are hooked up to the 48 or 16 (according to cab size) local users and the next cab further away from the optical node. Some of these amps are 15 or more years old and are thus potentially phutted.

The cabhave to be done in daylight and I've never seen VM give a warning.

The optical nodes may need more node devices fitted, more fibre pulled and tired lasers renewed. They deduce this from the SNR stats they collect.

The CMTSs at the VM end need the new higher capacity line cards and in some areas, new CMTSs have to be added to handle load.

Can 100 meg function without the cab upgrade? Badly, IMO, where a cab upgrade is needed. But prolly the optical node is more critical to 100 meg than the coax street cab.

Hope that explains more. Igni can amplify or correct anything I'bve not got right.

12-01-2012, 19:47	#51
Sephiroth Wisdom & truth Join Date: Jul 2009 Location: RG41 Services: RG41: 1Gig VOLT Rutland: Gigaclear 400/400 Posts: 13,205	Re: virgin media are replacing all the green boxes in my area The cabs (apart from optical nodes) house amplifiers. These amplifiers are hooked up to the 48 or 16 (according to cab size) local users and the next cab further away from the optical node. Some of these amps are 15 or more years old and are thus potentially phutted. The cabhave to be done in daylight and I've never seen VM give a warning. The optical nodes may need more node devices fitted, more fibre pulled and tired lasers renewed. They deduce this from the SNR stats they collect. The CMTSs at the VM end need the new higher capacity line cards and in some areas, new CMTSs have to be added to handle load. Can 100 meg function without the cab upgrade? Badly, IMO, where a cab upgrade is needed. But prolly the optical node is more critical to 100 meg than the coax street cab. Hope that explains more. Igni can amplify or correct anything I'bve not got right. __________________ *Seph.* My advice is at your risk.