|reply to raytaylor |
Re: Fibre / GPON forums
said by raytaylor:Most commonly for copper there are two primary cables, one from the CO to the cross-connection box (X-Box or B-Box) which is referred to as the facility 1 (F1) and another cable from the crossbox to the serving terminal and from there its dropped to the customer, this cable is known as the facility 2 (F2).
I imagine that with copper telephone plant, a subscriber's telephone line can be patched into multiple different trunk cables as it goes back to the telephone exchange.
Lets say a technician is dispatched to install service to a customer at 1010 main street from a terminal behind the customers business, connected through a crossbox behind a building at 400 Main Street, the technicians assignments might look like this.
BF1 CA 2 PAIR 1247 BP 247
AF2 R400MAINS PAIR 35 R1010MAINS BP 10
This advises the technician he is installing 555-1212, utilizing buried F1 cable 2 pair 1247, which will appear in the crossbox on binding post 247, from there he will place a cross jumper (PXJ) to a aerial F2 cable identified by the crossbox address on pair 35 which will appear within a terminal located to the rear of 1010 main street on binding post 10.