Of course it may depend what the fibre is for , but with NGA it will done over a period of time for somewhere like Cheltenheam. . Its just not possible to do it all in one go . For a start there just isnt the man power to do it , and you cannot predict what obstacles will arise, but you can be sure there will be many. Also the local authourity are unlikely to give permission for all the street works to go ahead together.
Some cabs get installed before the main spine cables are even in place because of street works delays.
Not sure what you mean by `sleeve' but susspect its just a re-shell of the old cabinet to allow extra space for the cables to link to the FTTC cabinet.
All the FTTC cabinets require vents.
Edited by Ribble (Wed 21-Sep-11 13:24:15)